To see the other types of publications on this topic, follow the link: Pipe industry.
Dissertations / Theses on the topic 'Pipe industry'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Pipe industry.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Shih-Yun, Liu. "Slurry dewatering in the pipe jacking industry." Thesis, University of Leeds, 2010. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619040.
Full text
2
Påhlsson, Carl. "Improved pipe support design for the process industry to reduce mechanical loads on pumps." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-44338.
Full textAbstract:
This master thesis has been written to develop a new pipe support for pipe systems in the process industry. The purpose was to relieve pumps or other sensitive equipment from elevated forces or moments that may cause failure. The elevated forces or moments occur due to the weight of the piping, the weight of the medium and expansion due to elevated temperatures. The support is mainly designed to be implemented in a 90 degree bend but they can also be implemented in straight pipes with small adjustments of the attachment between the support and the pipe. Six different complete concepts were developed and put through different elimination matrices and evaluated against a requirement specification. The final design was calculated to withstand the forces and moments from a worst case scenario. The concept is in need of further development and testing before it can be implemented in projects. It is necessary to investigate if the clamps can withstand the working load in the new design. The concept should also be tested possibly by a prototype.
3
Edward, Stuart James. "The design of a new pipe measuring system for oil and/or natural gas exploration." Thesis, Queensland University of Technology, 2000.
Find full text
4
Berglund, Daniel. "Life cycle assessment comparison of CIPP lining and traditional pipe replacement." Thesis, KTH, Miljöstrategisk analys (fms), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-169935.
Full textAbstract:
During the so-called “Miljonprogrammet”, over a million homes were built in Stockholm. As the buildings mature, parts of the buildings reach their technical life times and it is time to renovate them. At a time when the environmental impact of humans is a hot topic, it is appropriate to take the environment into account when deciding upon which restoration method to use. The sewage pipes are one of the important building parts in need of repair. This can be achieved by for example traditional pipe replacement or Cure-In-Place-Pipes (CIPP-lining).The goal of this study is to investigate and compare the environmental impact of traditional pipe replacement versus the use of the relining method CIPP lining by conducting a comparative life cycle assessment (LCA). The methods differ in the way that traditional pipe replacement demolishes the outer layers of the bathrooms and remove the old pipes to replace with new and restore the surface layers while CIPP-lining renovates the pipes from the inside with the use of a flexible liner.The purpose of the study has been to clarify the differences in environmental impacts of the different methods in a clear and easily understood way and thereby also simplify the decision-making process of property owners in need of renovation.With aid of the guidelines in ISO standards 14040 and 14044 a correct methodology has been used to ensure that the level of this work will be as high as possible. In combination with the software SimaPro specifically developed to handle the creation of various forms of life cycle assessments and the ISO standards a complex system been analyzed in detail.The results of the study show that CIPP-lining generally cause less environmental impacts than the traditional pipe replacement method. The analysis of 14 selected impact categories show that CIPP lining is preferable in 13 categories and that the traditional pipe replacement is preferable in 1 category. The sensitivity analysis show that the results change drastically depending on how much of the materials and energy used to demolish and reconstruct the outer layers of the bathroom one chooses to allocate to the new sewer pipes.The results show that the CIPP-lining results are dependent on the consumables and the liner assembly processes while the energy usage of the production process does not have a large impact on the results. For the traditional pipe replacement the results show that the consumable process is clearly the biggest impact while the piping production inflicts the least impact on the result.
5
Yardi, Chaitanya Narendra. "Design of regulated velocity flow assurance device for petroleum industry." Texas A&M University, 2004. http://hdl.handle.net/1969.1/1527.
Full textAbstract:
The petroleum industry faces problems in transportation of crude petroleum be-
cause of the deposition of paraffins, hydrates and asphaltenes on the insides of the
pipeline. These are conventionally removed using either chemical inhibitors or mechani-
cal devices, called pigs, which travel through the pipeline and mechanically scrape away
the deposits. These pigs are propelled by the pipeline product itself and hence travel at
the same velocity as the product. Research has indicated that cleaning would be better
if the pigs are traveling at a relatively constant velocity of around 70% of the product
velocity.
This research utilizes the concept of regulating the bypass flow velocity in order to
maintain the pig velocity. The bypass flow is regulated by the control unit based on
the feedback from the turbine flowmeter, which monitors the bypass flow. A motorized
butterfly valve is used for actually controlling the bypass flow.
In addition to cleaning, the proposed pig utilizes on-board electronics like accelerom-
eter and pressure transducers to store the data gathered during the pig run. This data
can then be analyzed and the condition of the pipeline predicted.
Thus, this research addresses the problem of designing a pig to maintain a constant
velocity in order to achieve better cleaning. It also helps gather elementary data that
can be used to predict the internal conditions in the pipe.
6
Howell, Clarence III. "Implementing the Six Sigma Breakthrough Management Strategy to Reduce Bowed Pipe Defects in the Oil and Gas Industry, a Black Belt’s Approach." Youngstown State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1593025696718874.
Full text
7
Yarime, Masaru. "From end-of-pipe technology to clean technology effects of environmental regulation on technological change in the chlor-alkali industry in Japan and Western Europe /." Maastricht : Maastricht : Universiteit Maastricht ; University Library, Maastricht University [Host], 2003. http://arno.unimaas.nl/show.cgi?fid=6566.
Full text
8
Lima, Luiz Eduardo Melo. "Análise do modelo de mistura aplicado em escoamentos isotérmicos gás-líquido." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264105.
Full textAbstract:
Orientador: Eugênio Spanó RosaTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica
Made available in DSpace on 2018-08-18T15:26:34Z (GMT). No. of bitstreams: 1 Lima_LuizEduardoMelo_D.pdf: 3018902 bytes, checksum: ac45ca48369c0c21398892fa2f7de5ac (MD5) Previous issue date: 2011
Resumo: Escoamentos gás-líquido são frequentemente encontrados na natureza, bem como em diversas aplicações industriais. Na área de produção de petróleo, por exemplo, em sistemas de elevação natural ou artificial (gas-lift contínuo ou intermitente), gás e óleo escoam simultaneamente em tubulações. A previsão de escoamentos gás-líquido torna-se necessária à viabilidade técnica-econômica de muitos processos industriais, por exemplo, na indústria de petróleo devido ao aumento do consumo mundial de combustíveis e a descoberta de novos campos petrolíferos. Em escoamentos gáslíquido, as fases se distribuem espacialmente e temporalmente ao longo da tubulação dependendo das vazões, propriedades físicas das fases e das características da tubulação, entre outros parâmetros. A combinação destes fatores gera diversos padrões de escoamento gás-líquido que podem ser agrupados em três classes principais: disperso, separado e intermitente. Os principais objetivos deste trabalho são o desenvolvimento e a análise de uma modelagem unidimensional em regime permanente, baseada no modelo de mistura, que permita a simulação de escoamentos isotérmicos gás-líquido em tubulações com seção transversal circular constante, considerando a fenomenologia envolvida nestes escoamentos. Dentre as contribuições obtidas com a realização deste trabalho destacam-se: a identificação das vantagens e limitações do modelo; as análises de suas formulações, dos parâmetros de fechamento e de sensibilidade às variáveis relacionadas aos padrões; a proposição de um método de solução para um modelo fenomenológico de força de atrito na parede, aplicável aos diversos padrões de escoamento gás-líquido. Os resultados do modelo de mistura foram comparados contra dados experimentais do gradiente de pressão de escoamento nos padrões disperso, separado e intermitente, em diversas inclinações de tubo. Além disto, foram realizadas análises envolvendo transição de padrão de escoamento num tubo vertical. Os resultados obtidos demonstraram que o modelo de mistura captura de forma satisfatória o gradiente de pressão para os diversos padrões de escoamento gás-líquido, num único algoritmo de integração
Abstract: Gas-liquid flows are often found in nature as well as in various industrial applications. In the oil production, for example, in natural or artificial lift systems (continuous or intermittent gas-lift), gas and oil flow simultaneously in pipes. The prediction of gas-liquid behavior becomes necessary for technical and economic viability of many industrial processes, for example, the oil industry due to the increase of world oil consumption and the discovery of new oilfields. In gas-liquid flow, the phases are distributed spatially and temporally along the pipe depending on the flow rate, phase's physical properties and pipe characteristics, among other parameters. The combination of these factors creates different gas-liquid flow patterns that can be grouped into three main classes: dispersed, separated and intermittent. The main objectives of this work are the development and analysis of a steady one-dimensional modeling, based on the mixture model, which allows the simulation of isothermal gas-liquid flow in pipes with constant circular cross section, considering the phenomenology involved in these flows. Among the contributions obtained in this work stand out: to identify the advantages and limitations of the model; the analysis of their formulations, closing parameters and sensibility to variables related to the patterns; to propose a solution method for a phenomenological model of the wall friction force, applied to the different gas-liquid flow patterns. The mixture model results were compared against pressure gradient experimental data from flow in the dispersed, separated and intermittent patterns, in different pipe inclinations. In addition, it was performed an analysis of the flow pattern transition in a vertical pipe. The results showed that the mixture model captures satisfactorily the pressure gradient for different gas-liquid flow patterns, in a single integration algorithm
Doutorado
Termica e Fluidos
Doutor em Engenharia Mecânica
9
O'Grady, Erin L. "The implementation of a Kanban system in a multi-facility organization with a shared tooling constraint." Ohio : Ohio University, 2001. http://www.ohiolink.edu/etd/view.cgi?ohiou1174065058.
Full text
10
Balogh, George W. "Entrepreneurs, city builders, and pine forest industries in south Arkansas, 1881-1963 /." Full-text version available from OU Domain via ProQuest Digital Dissertations, 1992.
Find full text
11
Lima, P. C. R. "Modelling of transient gas-liquid flow and pigging in pipes." Thesis, Cranfield University, 1999. http://hdl.handle.net/1826/4176.
Full textAbstract:
More
and more transient gas-liquid operations in pipes are being successfully applied in the oil
and gas industry. Pigging in two-phase pipelines, to remove liquid accumulation or for cleaning
purposes, is an important transient operation. Another important operation is the injection of (-)-as
to transport the accumulated liquid in the pipeline to process facilities. Analysis of such transient
two-phase flow in a pipeline is necessary not only for designing the liquid and (Yas handling
facilities, but also for safe operating procedure. In pipeline-fiser system such operations cause
even more severe changes in flow conditions.
A two-fluid model has been developed to determine the transient behaviour of fluids during these
operations.T he derived one-dimensionasl et of equationsf or each flow pattern describet he flow
of fluids in all regions. Semi-implicit finite difference schemes were used to solve the initial and
boundary value problem for each phase of the process- gas/pig injection, gas shut-in, slug
production and gas flow out of the system.
An extensive experimental program has been carried out to acquire two-phase transient flow and
pigging data on a 67 m long, 0.0525 m diameter, 9.9 m high pipeline-riser system. A computer
based data acquisition system has been utilised to obtain rapidly changing and detailed information
of the flow behaviour during the transient tests. The model results compare well with the
experimental data for characteristics such as inlet pressure, hold-up and pig velocity.
12
Casanova, Vanessa Dubois Mark R. "Three essays on the pine straw industry in a Georgia community." Auburn, Ala., 2007. http://repo.lib.auburn.edu/2007%20Fall%20Dissertations/Casanova_Vanessa_8.pdf.
Full text
13
Leung, Ho-yin. "Crisis management in Hong Kong : a case study of short pile problems in public housing /." Hong Kong : University of Hong Kong, 2002. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25138674.
Full text
14
Goh, Jung Hean. "Real time water pipes leak detection using electromagnetic waves for the water industry." Thesis, Liverpool John Moores University, 2011. http://researchonline.ljmu.ac.uk/6013/.
Full textAbstract:
This project concerns the use of an electromagnetic sensor for the detection of leaks/cracks in water pipes. As old metal pipes corrode they start to become brittle, resulting in the potential for cracks to appear in the pipes. In addition corrosion can build up resulting in a restricted flow of water in the pipe. Using an electromagnetic (EM) wave sensor to monitor the signal reflected from the pipes in real time, provides the necessary information to determine where a leak in the pipe has occurred. Analysis of the reflected signal can provide the operator with information about the condition and position of a leak within the pipe. This is the first time research has been carried using EM waves for leak detection in water pipelines. This project involves the design and construction of an EM sensor operating at frequencies in the range of 240MHz to 560MHz, and at a power of OdBm. The sensor is launched into the water pipeline through any existing hydrant and is moved along the pipeline to check for leaks. The simulation software High Frequency Structure Simulator (HFSS) was used to model the pipe section as a circular waveguide cavity, and also for antenna simulation. The monopole and loop antenna were designed to determine the best antenna for this project. The printed circuit board (PCB) design package Eagle was used to provide the surface mount layout for the sensor, and the PCB board was fabricated by using a computer numerical control (CNC) routing machine. Finally the graphical interface package LabVIEW was used to control the frequency sweep for the sensor and to capture the data from the sensor. Based on the findings of this project, the EM wave sensor could be used to determine a leak up to a 0.9 correlation limit using low cost RF electronic devices.
15
Mason, Nicholas Scott. "The asset lives of plastic pipes : technical and economic factors affecting the in-service life of pressurised polymer pipes in the water industry." Thesis, Imperial College London, 1998. http://hdl.handle.net/10044/1/8218.
Full text
16
Whyte, David. "Power, ideology and the regulation of safety in the post-Piper Alpha offshore oil industry." Thesis, Liverpool John Moores University, 1999. http://researchonline.ljmu.ac.uk/5020/.
Full text
17
Sanders, Joseph Michael Burgess. "Techniques to determine the remaining in-service life of polymer pipes for the water industry." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/6135.
Full textAbstract:
Polymer pipes have been used in water distribution networks in the UK since the 1950’s. Prior to this, the water system implemented in the Victorian era had served the country for over 100 years. In more recent times, the Victorian pipe system has undergone extensive renovation. Much of this has required the replacement of the old network using polymer pipes, which are expected to have a working life of 50-100 years. The value of using polymer water pipes has been studied for many decades. Specifically, research has used set conditions to determine overall pipe in-service lifetime. However, these set conditions often do not mirror reality; in-service pipes experience and must cope with, different loads, varying soil types and changeable chemical composition of water additives. As a result, water companies currently have no methodology to accurately determine the remaining in-service life of their polymer pipes. Currently, a water pipe is only replaced when it has failed, or is deemed to have reached the end of its in-service life. The ability to do small scale tests to obtain accurate service life information would greatly benefit the planning of works and the locating of sites where pipes are no longer fit for service. This in turn would improve cost effectiveness of pipe replacement works and importantly, maintain good customer-relations. This thesis aimed to review how different techniques could be utilised to predict the overall lifetime of polymer pipes under various, more realistic conditions, and to critically assess each for suitability and accuracy. To thoroughly investigate each of these techniques, tests were carried out on polyethylene pipes. Two different polyethylene grades currently used by Thames Water were tested: PE100 used mostly as the central main pipeline and PE80 used to connect the mains to the customer. Accelerated ageing was employed to artificially age pipe material for varying periods of time and under different stresses and temperatures. In order to quantify the incurred effects upon the polymer pipe, specific markers pertaining to polymer carbonyl content, crystallinity, density and susceptibility to thermal oxidation were subsequently investigated. Extrapolation methods were then used to identify suitable markers for determining remaining in-service lifetime of polymer pipe. The results presented in this thesis are of numerous chemical evaluations carried out on various aged polyethylene samples. The identification and subsequent use of appropriate chemical evaluation techniques allowed the generation of a method that ranked pipes in terms of replacement priority. Furthermore, these results indicate that polyethylene degrades via a different mechanism in Arkopal as compared with water; it appears that Arkopal promotes polymer chain disentanglement, not oxidation-related embrittlement.
18
梁浩然 and Ho-yin Leung. "Crisis management in Hong Kong: a case study of short pile problems in public housing." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B31966871.
Full text
19
Burton, Joanne. "Soil Nitrogen Dynamics Under Adjacent Native Forest and Hoop Pine Plantations." Thesis, Griffith University, 2007. http://hdl.handle.net/10072/365851.
Full textAbstract:
Single-species plantation forests have become the dominant source of inputs for the Queensland forest industry. Almost a quarter (50,000 ha) of the Queensland plantation estate is accounted for by plantations of the nitrogen (N) demanding species, hoop pine (Araucaria cunninghamii). The majority of the hoop pine estate was originally native forest, and is currently moving into the second rotation phase. The future of plantations of this N demanding species is dependent on the long-term maintenance of soil N cycling and availability. Land-use change can impact soil N dynamics; however there is currently limited knowledge of how the land-use change from native forest (NF) to first rotation (1R) hoop pine plantation and subsequent second rotation (2R) hoop pine plantation, and the associated disturbance due to site preparation have influenced soil N transformations and availability. The objectives of this study were to examine the impact of land-use change from 1) NF to 1R hoop pine plantation, and 2) 1R hoop pine plantation to 2R hoop pine plantation on soil N dynamics. The impact of the current 2R residue management strategy was also examined. The study was conducted in adjacent NF, 1R hoop pine plantation, and 2R hoop pine plantation (5-year old) in Yarraman State Forest, south-east Queensland. A laboratory incubation using the 15N isotope dilution method was undertaken in order to examine the impact of land-use change and residue management on gross N transformations. Results showed that land-use change had a significant impact on soil N transformations. The conversion of the NF to the 1R hoop pine plantation significantly reduced the availability of NH4+-N and NO3- -N. It also decreased the rate of gross N mineralisation (measured under anaerobic conditions) and gross nitrification (measured under aerobic conditions). This result was related to lower soil, litter and root C:N ratios in the NF compared to the 1R hoop pine plantation, indicating a reduction in organic matter quality associated with the land-use change. The conversion of 1R to 2R hoop pine plantation resulted in an increase in the gross rate of ammonification. This was attributed to an increase in mineralisation of native organic N associated with changes in soil physical conditions and microclimate as a result of harvesting. Residue management was found to have no significant influence on the soil N transformations in the 2R plantation approximately five years after establishment. A second study focused on quantifying the impact of land use and residue management on soil soluble organic N (SON) pools using a variety of extraction methods, including water, hot water, 0.5 M K2SO4, 2 M KCl and hot KCl. Both land use and residue management were found to have a significant influence on the size of soil SON pools. The conversion of NF to 1R hoop pine plantation tended to result in a decrease in the amount of soil SON and the potential to produce SON. This reduction coincided with increased soil, litter and root C:N ratios, and may therefore be the result of a decline in organic matter quality and quantity. The conversion of 1R to 2R hoop pine plantation generally resulted in a reduction in the amount of SON. Residue management also had a significant influence on soil SON pools, which tended to be higher in windrows of harvest residues than in tree rows. The impact of land-use change on the size, activity, and composition of the soil microbial community was examined using fumigation-extraction, CO2 respiration, and community level physiological profiling (CLPP) techniques. Landuse change from NF to 1R hoop pine plantation resulted in a reduction in microbial biomass and activity, and a shift in soil microbial community composition. While the conversion from 1R to 2R hoop pine plantation appeared to have no significant influence on the size and activity of the soil microbial community, there were some indications of a difference in community composition. Soil microbial biomass and activity tended to increase as the quality and quantity of organic matter input increased. An 18-month field-based study was conducted using the in-situ incubation method to examine the impact of land-use change on seasonal N dynamics. The results of this study were consistent with results from the laboratory studies. In general, the rate of N transformations and size of soil mineral N pools and microbial biomass were lower in the 1R soil compared to the NF soil. The 1R soils tended to have lower total C and total N, and higher C:N ratios compared to the NF soil, indicating that lower rates of N transformation and N availability in the 1R soil may be a result of significant reductions in organic matter quality and quantity. While the difference in the rates of net N mineralisation and net nitrification among the plantation soils were statistically insignificant, over the 18-month sampling period more N was mineralised and nitrified in the 2R soil compared to the 1R soil. Residue management also influenced the total amount of N transformed over the sampling period, with more N tending to be mineralised and nitrified in soil under windrowed residues compared to soil under tree rows. Seasonal fluctuations in soil N dynamics tended to be controlled by temperature and soil moisture. From these results, it was concluded that land-use change and residue management had a significant impact on soil N dynamics. This was possibly associated with shifts in the quality and quantity of organic inputs, soil microbial properties and microclimate conditions. Results from this study indicate that land-use change and residue management may have implications for the long-term productivity of the soil resource. Future studies are required to improve the understanding of the chemical and biological mechanisms driving changes in soil N dynamics.Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Griffith School of Environment
Faculty of Science, Environment, Engineering and Technology
Full Text
20
Rocha, Michelle Roberta, and 羅慧欣. "Pleasure imagination play in Hong Kong : a case study of the establishment of the PIP cultural industry." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hdl.handle.net/10722/192775.
Full text
21
Torres, Montiel Saudith Marcela. "Estudio de evaluación económica de una secuencia minera para un modelo de Stock Pile generado bajo simulación condicional." Tesis, Universidad de Chile, 2018. http://repositorio.uchile.cl/handle/2250/159411.
Full textAbstract:
Tesis para optar al grado de Magíster en MineríaEl ciclo de planificación estratégica permite alinear el desempeño del plan acorde a las directrices corporativas, generando un proceso de trabajo que controla el riesgo y maximiza los resultados. La estrategia de las empresas mineras que consideran incluir stock de largo plazo en los planes de vida de mina abre una ventana para generar procesos que cubren distintas etapas de la evaluación de proyectos mineros. Los stock piles cumplirán una función determinada para la mayor parte de las estrategias de la planificación minera, sin embargo el manejo de eso tiene asociado un costo alto de recuperación. Este trabajo ilustra un escenario en el que se considera un stock pile como reserva en el LOM (Life of Mine), se presentan tres casos de modelación para dicho stock (modelo con información Histórica, modelo con muestreos y modelos de simulación condicional), se desarrolla una secuencia minera parametrizada de la misma forma para todos los casos de modelo y se evalúa económicamente el comportamiento para cada escenario, buscando ilustrar la viabilidad de un proyecto minero, basado en un stock pile.
22
Garnit, Sadok. "Etude d'un système de génération d'électricité comportant une pile à combustion PEM et un générateur d'hydrogène pour la voiture électrique." Paris, ENMP, 2002. http://www.theses.fr/2002ENMP1118.
Full text
23
Shiner, Justin. "Place as occupational histories : an investigation of the deflated surface archaeological record of Pine Point and Langwell Stations, Western New South Wales, Australia /." Oxford : Archaeopress, 2008. http://catalogue.bnf.fr/ark:/12148/cb41263603m.
Full text
24
Eriksson, Daniel. "Wood - an anatomical structure in the tree and an engineering material in industry : prediction of material properties in managed Scots pine stands in the forest /." Umeå : Dept. of Forest Ecology and Management, Swedish University of Agricultural Sciences, 2008. http://epsilon.slu.se/200873.pdf.
Full text
25
Gullmark, Tina, and Albert Zeneli. "Från naturlig råvara i skog till furu som slutprodukt : Kartläggning av talltimrets försörjningskedja." Thesis, Högskolan i Gävle, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-27558.
Full textAbstract:
Stora Enso is today one of the four largest companies in the swedish forest industry. The company's business is spread all over the world, but it’s headquarters are located in Sweden and Finland. Stora Enso Skog is part of the company's global organization for wood supply to Swedish sawmills, paper mills and pulp mills. As all companies, regardless of industry, are part of a supply chain, an impact on and by other performers in the chain occurs. It is this influence that determines the prerequisites and starting points for effective processes and flows. The supply chain between forests and industry, on the other hand, is complex as tree as a raw material source are generally difficult to specify. The purpose of this case study is, therefore, to map the supply chain of the pinetree-timber at the “Dalälven” area from forest harvesting to measurement and sorted stock at the sawmill. Based on this objective, a delimitation has been made in such a way that the case study is performed only after pinetree-timber as a product. By dividing this pinetree-timber process into three parts; the harvesting process, the transport process and the measurement process an observation and semi-structured interviews was made with closely related staff as well as the transport partner Westan Logistik. The answers from interviews constituted an empirical comparison that was then compared to reviewed secondary data in the form of different literary theories. The results are visualized through a process flowchart, a information flowchart, a value-flow analysis, and a leadtime analysis, which have shown, among other things, that the value-creating activities (V) are less compared to non-value-creating activities (I) and the necessary non-value creation activities (N) in the pine-tree timber process. Even the leadtime proportion is greatest in the non-value-creating activities. The results provided the basis for an analysis and, last but not least, conclusions could be drawn. Because the raw material is complex, and the pinetree-timber process contains many performers, it can be a challenge to get a smooth and efficient flow through the supply chain. Interviews and theories have shown that the physical as well as the informative flow has difficulties which, for instance, slow down the process more than necessary. It is therefore interesting to see through a mapping how these can be improved and have a higher level of efficiency.
26
Schwab, Olaf Sebastian. "An agent-based forest sector modeling approach to analyzing the economic effects of natural disturbances." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/2921.
Full textAbstract:
This dissertation describes the development of CAMBIUM, an agent-based forest sector model for large-scale strategic analysis. This model is designed as a decision support tool for assessing the effect that changes in forest product demand and resource inventories can have on the structure and economic viability of the forest sector. CAMBIUM complements existing forest sector models by modeling aggregate product supply as an emergent property of individual companies’ production decisions and stand-level ecological processes. Modeling the forest products sector as a group of interacting autonomous agents makes it possible to introduce production capacity dynamics and the potential for mill insolvencies as factors in modeling the effects of market and forest inventory based disturbances.
This thesis contains four main manuscripts. In the first manuscript I develop and test a dispersal algorithm that projects aggregated forest inventory information onto a lattice grid. This method can be used to generate ecologically and statistically consistent datasets where high-quality spatial inventory data is otherwise unavailable.
The second manuscript utilizes this dataset in developing a provincial-level resource dynamics model for assessing the timber supply effects of introducing weevil-resistant spruce. This model employs a stand-level approach to simulating weevil infestation and associated merchantable volume losses. Provincial-level impacts are determined by simulating harvest activities over a 350 year time horizon.
In the third manuscript I shift the focus to interactions between forest companies. I analyze the effects of strategic decisions on sector structure by developing CAMBIUM as an agent-based model of competition and industry structure evolution. The forest sector is modeled as a group of autonomous, interacting agents that evolve and compete within the limitations posed by resource inventories and product demand.
In the final manuscript I calibrate CAMBIUM to current conditions in the British Columbia forest sector. Industry agents compete for roundwood inputs, as well as for profits in finished product markets for pulp, panel products, and lumber. To test the relevance and utility of this model, CAMBIUM is used to quantify the cumulative impacts of a market downturn for forest products and mountain pine beetle induced timber supply fluctuations on the structure of the forest sector.
27
Lindqvist, Sven. "En teoretisk modell av furu för en effektiv produktion av attraktiv furuparkett. : -En studie i effektivt råvaruutnyttjande." Thesis, Linnéuniversitetet, Institutionen för skog och träteknik (SOT), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-96976.
Full textAbstract:
Wood has in several ways become a sought after material, much thanks to the materials advantages from a sustainability point of view. There are several indicators that this will continue and that the competition of the raw material will increase. The efficient utilization of raw materials is considered central, both from a societal perspective but also for the individual company, which can increase their profitability with a well considered wood. The complexity of the raw material puts great demand on knowledge and logistics to achieve an efficient utilization. This study is a case study that investigates the requirements of the wood for the production of pine parquet at the parquet producer Berg & Berg. To clarify the consumers need, a literature study about the customer preferences about floor has been carried out. To be able to develop a descriptive model on which timber best meets the requirements, from production as well as the customers’ needs, a literature study about pines wood property has been done. This examines how the wood properties vary within logs, between individual trees and between stands. In addition, a description is made of how the raw material is handled by the forest and sawmill industry with the help of literature studies. The wood properties that are important for the customer when buying flooring is the visual appearance in which an even distribution of knots is the most desirable. Dry knots create problems with rework in the production. The most suitable wood is obtained from stands with a lower site index. It’s the middle part of the trunk that meets the requirements for an even knot structure with a larger green-knot zone with a lower proportion of juvenile wood. A one-sided focus on increased volume and lower production costs in forestry and sawmill industry, as well as information barriers between different players in the production chain, makes it more difficult to efficiently utilize the raw material where a more customer oriented range is received. With good knowledge about wood properties, a simple tree model can be derived. For a producer, the tree model can simplify the communication with wood suppliers to obtain a more customer oriented wood.
28
Banda, Méndez José Carlos. "“Siempre de pie, nunca de rodillas” : construcción, enunciación y reproducción de la identidad k´ana en Espinar." Master's thesis, Pontificia Universidad Católica del Perú, 2018. http://tesis.pucp.edu.pe/repositorio/handle/123456789/13796.
Full textAbstract:
En esta tesis, se discuten y analizan las distintas narrativas sobre la identidad k´ana en Espinar.
La dimension étnica está cada vez más presente en las narrativas identitarias y ello se ha visto
impulsado por los conflictos sociales ocurridos en las últimas décadas. Por esta razón, es
importante discutir los distintos usos políticos de estas narrativas. Para ello, debemos
aproximarnos a las fronteras étnicas y concebir estas narrativas como producciones elaboradas
por sujetos con plena agencia. Asimismo, debemos comprenderlas como discursos que son
producto de un pasado histórico, pero también recreados en un contexto social marcado por
los conflictos sociales producto de la actividad minera. El análisis cualitativo nos ha permitdo
identificar estos usos y reconocer que las narrativas identitarias se entrelazan en una arena de
negociación política en la que se busca ejercer poder y legitimar proyectos politicos. Es decir,
las narrativas identitarias sobre lo k´ana en Espinar recrean distintas narrativas históricas bajo
una negociación política que busca legitimar un poder actual.Tesis
29
Ferreira, Jéssimon. "Sistemas capacitivos aplicados na avaliação da umidade relativa de madeira de pinus." Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2903.
Full textAbstract:
Este trabalho tem como propósito, caracterizar um sensor capaz de identificar o estado de umidade da madeira de Pinus da espécie Elliotti. O sensor projetado, foi implementado por duas placas metálicas de formato geométrico retangular formando um componente bipolar capacitivo. Para condicionar os sinais do sensor, foi implementado um circuito elétrico em ponte e integrado o sensor capacitivo nesse circuito elétrico que será alimentado por uma fonte de energia elétrica em corrente alternada (VCA) de alta frequência. O objetivo dessa integração, é obter nos ramos da ponte uma variação de sinal elétrico, em função da variação da reatância capacitiva entre as placas do sensor. A reatância capacitiva, é uma propriedade elétrica identificada na madeira quando essa atua como dielétrico entre as placas metálicas do sensor, e poderá sofrer variações em função da variação de umidade dos corpos de prova. Com a variação da reatância elétrica da madeira de pinus, foi possível registrar a variação da umidade dos corpos de prova tendo como parâmetro as variações dos sinais elétrico fornecidos pela ponte em função da reatância capacitiva. Para se obter os registros e realizar um método de comparação entre a umidade dos corpos de prova e sinal elétrico, os corpos de prova foram inicialmente saturados com água e durante um processo de secagem, foram coletados valores de leitura das grandezas elétrica envolvidas durante intervalos de tempos iguais até atingir o peso de massa seca. O diferencial desse trabalho em relação a outros do mesmo tema, é a sua capacidade de identificar em apenas uma ação, sem a utilização de processos destrutivos, pequenas áreas úmidas dentro de uma área de maior dimensão do material analisado. Os resultados obtidos, poderão ser visualizadas através de quadros, tabelas e gráficos.This work proposes to characterize a sensor able to identify the Pinus wood moisture status of the Elliotti species. The designed sensor was implemented by two metal plates of rectangular geometric shape forming a bipolar capacitive component. To conditionate the sensor signals, a bridged electric circuit has been implemented and the capacitive sensor integrated into this electrical circuit to be fed by a high frequency alternating current power source (VCA). The purpose of this integration is to obtain in the bridge’s branches an electric signal variation, as a capacitive reactance variation function between the sensor plates. Capacitive reactance is an electrical property identified in the wood when it acts as a dielectric between the sensor metal plates, and may suffer variations depending on the sample humidity variation. With the Pinus wood electric reactance variation, it was possible to record the humidity variation of the samples having as a parameter the electric signals variations provided by the bridge as a capacitive reactance function. In order to obtain the records and perform a comparison method between the humidity of the samples tests and the electrical signal, the samples were initially saturated with water and during a drying process, and the values of the electrical quantities involved were collected during equal time periods, until reaching the dry mass weight. The differential of this work in relation to others of the same theme, is its ability to identify in only one action, without destructive processes usage, small humid spots within a larger area of the analyzed material. The obtained results can be visualized through tables, tables and graphs.
30
Bellot-Gurlet, Ludovic. "Caractérisation par analyse élémentaire (PIXE et ICP-MS/-AES) d'un verre naturel, l'obsidienne : application à l'étude de provenance d'objets archéologiques." Phd thesis, Université Joseph Fourier (Grenoble), 1998. http://tel.archives-ouvertes.fr/tel-00759897.
Full textAbstract:
L'obsidienne a été utilisée comme matière première de l'industrie lithique au cours de périodes préhistoriques. Ce matériau possède des propriétés spécifiques qui caractérisent son lieu d'origine. La rareté de ses sources et l'intérêt dont l'obsidienne a fait l' objet par le passé en font pour le préhistorien un marqueur remarquable d'échanges et de contacts humains à grande distance. Nous montrons les avantages relatifs, pour la détermination de la composition chimique, de l'analyse sous faisceau d'ions par PlXE -Particle InducedX-ray Emission-, qui permet des mesures non destructives, et par plasma couplé par induction : ICP-AES -Inductively Coupled Plasma-Atomic Emission Spectrometry- et ICP-MS -Inductively Coupled Plasma-Mass Spectrometry-, qui nécessitent des prélèvements réduits mais donnent accès à un large spectre d'éléments. En Amérique andine (Colombie, Equateur) où les données sur la circulation de l'obsidienne étaient encore très limitées, nous avons apporté des données nouvelles sur les sources et commencé l' exploitation (PlXE, ICP) de plusieurs collections de pièces archéologiques préhispaniques. Les mesures par ICP ont permis une caractérisation plus complète des sources de la région. Nos résultats constituent la base de données la plus détaillée disponible à ce jour. Au Proche-Orient (Syrie, Turquie), nous avons apporté des informations sur cinq sites néolithiques de la moyenne vallée de l'Euphrate (10400-4500 ans av. J.-C). Nos résultats ICP confirment la prééminence de la Cappadoce comme source d'obsidienne au cours de cette période et l'émergence d'apports d'Anatolie orientale. Ils montrent aussi la difficulté de discriminer entre elles, par leurs compositions, plusieurs sources anatoliennes. En raison des difficultés de distinction entre sources, nous avons proposé l'utilisation d'une double caractérisation -composition chimique/datation par traces de fission- pour l'ensemble ColombielEquateur, et dans certains cas au Proche-Orient.
31
Lamoureux, Carole. "Le tuyau de fonte mussipontain à la conquête du monde. Pont-à-Mousson et sa politique exportatrice (1856-1970)." Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUL052.
Full textAbstract:
Créée en 1856 à Pont-à-Mousson (Meurthe-et-Moselle actuelle), la société du même nom (abrégée PAM) se spécialise dans la production de tuyaux en fonte pour l’adduction de l’eau et du gaz. Alors qu’elle doit encore se faire un nom, l’entreprise est confrontée à un marché intérieur contraint. Sa stratégie intègre un recours continu à des ventes hors métropole, à la fois à l’étranger et dans les colonies. La politique exportatrice qu’elle développe est poursuivie tout au long de sa croissance. Devenue un groupe reconnu pour sa gestion financière et son activité à l’international, PAM fusionne avec Saint-Gobain en 1970. L’abondance de ses archives permet d’interroger les raisons et les modalités de son dynamisme à l’exportation. Il s’agit alors de comprendre ce que recouvre cette activité et ce qu’elle implique. En tant qu’axe stratégique, le développement et la place de la politique exportatrice au sein de l’entreprise constituent le premier objet d’analyse. Entre variations du contexte international et critères industriels internes, l’exportation mussipontaine varie selon des facteurs nombreux. L’organisation et les moyens déployés par PAM pour conquérir les marchés hors métropole forment le deuxième volet d’investigation. Le dispositif commercial et les fournitures obtenues sont abordés dans leurs généralités et par l’approfondissement de cas d’étude. À chaque étape, les retombées de la politique exportatrice sont estimées. Les résultats industriels et financiers tendent alors à préfigurer les modalités de son maintien. La place de l’exportation dans l’image et la culture de l’entreprise fait quant à elle figure tant d’incidence que de facteur de continuitéFounded in 1856 in Pont-à-Mousson (current Meurthe-et-Moselle), the company of the same name (abbreviated PAM) specialized in the production of cast iron pipes for water and gas supply. While it still had to make a name for itself, the firm was faced with a constraint domestic market. Its strategy included the continued use of sales outside mainland France, both abroad and in the colonies. The export policy it developed was continued throughout its growth. PAM became a group renowned for its financial management and international activity, and merged with Saint-Gobain in 1970. The abundance of its archives makes it possible to investigate the reasons and modalities of its export dynamism. It is then a case of understanding what this activity covered and what it involved. As a strategic axis, the development and role of the export policy within the firm are the first object of analysis. Between changes in the international context and internal industrial criteria, PAM’s export varied according to many factors. The organization and means deployed by PAM to conquer markets outside mainland France form the second field of investigation. Its sales force and the supplies obtained are discussed in general terms and by the deepening of case studies. At every stage, the impact of the export policy is estimated. The industrial and financial results then tend to foreshadow the modalities of its maintenance. The place of the export policy in the image and culture of the firm seems to be both an impact and a continuity factor
32
Raynal, Caroline. "Frottement avec glissement de polymères fondus : filières à haute et basse énergie de surface." Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10002.
Full textAbstract:
Nous analysons l'ecoulement de polymeres fondus de grandes masses moleculaires dans des contractions brusques. Dans des filieres a haute energie de surface, un glissement macroscopique se manifeste pour des debits moderes lors de l'ecoulement oscillant. Pour des debits du meme ordre, un regime instable se developpe en amont de la contraction. Dans ce memoire, une etude experimentale detaillee de l'ecoulement oscillant a ete menee pour deux polyethylenes et les resultats obtenus pour l'un des produits ont permis de valider un modele theorique. Pour trois familles de polymeres, deux polyethylenes, un polybutadiene et cinq polydimethylsiloxanes, un nombre de weissenberg critique a ete mis en evidence pour le declenchement de l'instabilite amont. Dans des filieres a basse energie de surface, un glissement a lieu des les faibles regimes d'ecoulement. Ce glissement retarde le defaut de fissuration et supprime l'ecoulement oscillant. En vue d'ameliorer le procede d'extrusion, il est tres interessant d'etudier de telles filieres et de mieux comprendre les ecoulements mis en jeu. Aussi, avons-nous determine les courbes de frottement en termes de contrainte et de longueur d'extrapolation pour trois polymeres en ecoulement dans une filiere fluoree. Par ailleurs, differents composes quasi-cristallins ont ete etudies. Les essais en filiere ainsi que les analyses par mouillage ont montre que ces materiaux ne favorisent pas particulierement le glissement
33
Hoarau, Quentin. "Out with the Pipes, in with the Plugs : On the Economics of the Energy Transition in the Automobile Sector Interactions between electric mobility and photovoltaic generation Network tariff design with prosumers and electromobility: Who wins, who loses Stranded to be? Diesel ban and used car markets. Coordination of abatements and policies with sector coupling technologies." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASI006.
Full textAbstract:
Le développement de la mobilité électrique est le principal compromis technologique qui peut permettre au secteur automobile de réduire drastiquement ses émissions de gaz à effet de serre et de polluants locaux. Du retrait des véhicules thermiques à l'intégration des véhicules électriques dans le système électrique, cette thèse étudie plusieurs aspects économiques de cette transition énergétique.Le premier chapitre étudie empiriquement les effets des politiques urbaines de restriction de circulation des véhicules les plus polluants, en analysant le comportement de vendeur de voitures sur les marchés locaux de l’occasion.Le deuxième chapitre étudie théoriquement les conditions optimales de l’électrification du parc automobile. Il donne notamment des recommandations quant à la coordination de politiques sectorielles. Le troisième poursuit en détaillant les interactions entre mobilité électrique et énergie photovoltaique. Il développe un cadre d’analyse mettant en évidence les conditions techniques et économiques de ces interactions donnant lieu à une synergie.Le quatrième chapitre discute des effets distributifs de la tarification de l’accès aux réseaux électriques en présence de développement conjoint de la mobilité électrique et sources de production d’électricité décentraliséeThe development of electric mobility is the main technological compromise that will allow the automobile sector to drastically reduce its emissions of greenhouse gases and air pollutants. From the ban of thermal vehicles to the integration of electric vehicles in the power sector, this dissertation investigates several economic aspects of this transition.First, it empirically studies the impacts of urban policies that limit the access of most polluting vehicles by analyzing the behavior of car sellers on second-hand markets. Then, it theoretically precises the optimal conditions of the electrification of the automobile fleet how governments may plan support policies for electric vehicles that take into account their interaction with the power system.Third, it investigates the interaction between electric mobility and photovoltaic energy. It develops a systematic framework that enlightens technical and economic conditions of synergy.Fourth, it discusses the distributional effects from tariff design of power network with both distributed energy resources and electric mobility
34
Hu, Fu-Wen, and 胡福文. "A Study on Automation of Pipe Bender Industry Using Machine Vision." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/kvt33z.
Full textAbstract:
碩士崑山科技大學
機械工程研究所
97
In the early stage, the techniques of image processing were only confined its operation in simple image input, image saving, image output and external communication that fundamental function and its equipments. After the image digitalization, in recent years, because of computer improvement of software and hardware, to make image saving, image transmission , image recognition, image compression techniques, communication of multi-media, network and various using fields are vigorously prompt development. Nowadays, the techniques of image processing have extensively utilized for various subjects and daily life, besides greatly elevate the quality, speed, efficiency of image processing. Particularly, image processing were used on a mass of machine vision system for industry, commerce and Robot. The main points of this thesis are for studying the development and using of machine vision; Additionally, to emphasize the studying of automation for using machine vision to pipe bender, so then to raise automation of pipe bender and quality of pipe bending, to lower the manufacturing cost of pipe bender, to elevate further the competition of Taiwan pipe bender industry.
35
YEH, TZU-JUNG, and 葉次榮. "A Pilot Study of Industry 4.0 Implementation for Traditional Steel Pipe Plant." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/ny5qcb.
Full textAbstract:
碩士醒吾科技大學
資訊科技應用系
105
ABSTRACT This project has been introduced industrial 4.0 standard packages into a Pipe manufacturing company. This starter kits include internet-router, WIFI Access Point, Device-controller, IP-camera which cooperated with company’s existing ERP system. There are two main parts in this system, data-package and image-processing. The findings tell the disadvantages of introducing industrial 4.0 packages facing the difficulties to identify PLC which adopting old protocol could not be getting through. However, the image-processing module makes it up which help management level monitoring and analyzing WYSWYG data. Furthermore, the data-package module had been testing with CNC and pulling machine which demonstrates the functions of clouding data process is working fir this unit. The conclusions of the research are: PLC data-package functions depending on the PLC’s specification, Image-processing could be a supportive tool and even a major technique for industrial 4.0, The APP and Website are useful tools for employee to use. Key Words: Industrial 4.0, Image processing, Data package.
36
Lin, Chen-Jeng, and 林澄政. "Signal analysis of ultrasonic Nondestructive Inspection for Pipe Weld Applied in Nuclear Industry." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/91740137442152940498.
Full textAbstract:
碩士國立中央大學
土木工程研究所
82
The subject for evaluation and signal analysis of ultrasonic nondestructive inspection technique for pipe weld applied in nuclear industry had been studied for many years. In this subject, intergranular stress corrosion cracking (IGSCC) have critical effect to the safety of nuclear industry. In this thesis, automatic ultrasonic inspection scanning system was used to conduct experiments on a series of flat and curved specimens with various kinds of counter bore and notches as artificial defect near weld root. Through scanning imagine and signal analysis, some inspection procedures and data analysis methods are proposed for the IGSCC inspection. Those experience and conclusions can be ultilized in operator training or performance demonstration for industries. Furthermore, in the identification of inspection signals , four different analysis methods: (1) Scanning imagine method; (2) Time characteristic analysis; (3) Autocorrelation analysis; (4) Wavelet transform analysis were applied to scanning signal. These four methods can identify three reflectors separately. Especially, wavelet analysis methods can show time domain and frequency domain messages in a contour which can give us more messages for identification of signal characteristic and worth further investigation in the future. Combining the analysis results obtained from those four different methods, an evaluation table is designed for engineer or inspector to be a reference on identifying the reflector type from a scanning signal.
37
Kuo, Chiang-Pin, and 郭江屏. "A case study of Business Operation Strategy for Concrete Pipe Manufacturing Industry in Taiwan." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/14338895036934680745.
Full textAbstract:
碩士長榮大學
經營管理研究所
94
The purpose of this study is to explore business operation strategy for concrete pipe manufacturing industry in Taiwan. Base on Porter’s structural analysis of industries (five forces), Ansoff’s SWOT analysis, as well as Weihrich’s TOWS Matrix, this paper concludes main findings as following: 1. Vision of a company leader makes changes. No benefits will be made when a company goes in an easy way. Operational effectiveness is no longer a perfect choice for business. Strategy should be applied in operation. 2. Well-planned supply chain management and good economy of scale maintain profitability. By producing cheaper products with higher process efficiencies, gaining lower cost materials, low cost strategy for concrete pipe manufacturing industry may gain significant market share and sustain a competitive advantage. 3. Unique offerings can not only charge a premium price for products, but also keep customers loyalty to company. With nearing nero switching cost, low product differentiation, unique attributes of products easily contribute customers loyalty to brand in concrete pipe manufacturing industry. 4. Vertical integration and entry into new industries or businesses may position company in a better future and provide company capabilities to defense against the operational difficulties due to the industry matures and market declining.
38
廖敏雄. "A Study of Theory of Constraints Applied to Production Management in Heat Pipe Industry." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/71099572814786032779.
Full textAbstract:
碩士國立交通大學
管理學院高階主管管理碩士學程
95
Estimating the thermal requirement for desktops, heat pipe suppliers adopt thermal modules with heat pipes instead of traditional thermal modules. Owing to tremendous production capacity increase in the first half of 2005, thermal module suppliers covet the big market, so they start to make their own heat pipes to have vertical integration and lower the cost. The industry pattern changes from the demand exceeding the supply to the supply exceeding the demand, from mass production to small quantity but large variety, and from planning production to build-to-order. The industry faces severe challenge. The first priority target is how to enhance customer satisfaction to win more orders. In order to satisfy customer demand, the business must provide the services that emphasize on the three key factors：cost, quality and delivery. However, the price is fixed based on the market mechanism, so no matter how much the cost is, when there is no big difference in price and quality between competitors, the delivery and the accuracy become the most key factors when getting orders. Therefore, the direct strike is the production planning and management. When the market competition is getting fiercer, the production planning and management not only get more complicated, but also become the focus to win or loss. How to react effectively is the mission for managers who are indispensable and devoted. Dr. Goldratt provides easy and practical production planning and management theory in Drum-Buffer-Rope (DBR). After the development for two decades, DBR becomes the best solution for industries. Therefore, this research is to build up the DBR model through the DBR implementation, and provide the case of how one heat pipe company can shorten the production cycle effectively, lower down the stock and increase the delivery accuracy.
39
YANG, HSIU-WEN, and 楊琇文. "A Study of Operation Strategy for the Steel Pipe Industry: The Case of D Company." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/dnjkhy.
Full textAbstract:
碩士國立高雄大學
國際高階經營管理碩士在職專班(IEMBA)
105
With the advent of global competitive steel market that has been gradually saturated, the steel industry needs to rethink about how to deal with the new different steel industry to develop new markets that stimulates steel demand continued to grow. Taiwan is an Island-type economy which needs to develop international economy through international trade. At present, the Taiwan steel market is facing saturation and low price competition. Moreover, the domestic labor, land, and energy costs have steadily increased. It not only needs to face competition in the domestic market, but also to actively expand the international market. To deepen this concept, therefore, the research thesis attempts to use the SWOT analysis technique for the D case company to develop operation strategies. To derive findings and suggestions, the research adopts in-depth interviews to explore the company's strengths, weaknesses, opportunities and threats for the case company. The empirical results show that based on interviewee’s opinions, concepts, and experiences the case company is equipped with a high degree of operational strengths and opportunities, while the weakness and threats tend to moderate up and down. Finally, according to the results of the study, the research thesis also presents implications and suggestions for the future operation development of the case company.
40
Su, Chin-shu, and 蘇金樹. "Operation Strategy Analysis for the Stainless Steel Pipe Fittings Industry – The Case of C Company." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/55912148599128097240.
Full textAbstract:
碩士國立高雄大學
高階經營管理碩士在職專班(EMBA)
100
With the increasing requirement of high quality in the modern business, the stainless steel pipe fitting is one of the essential industries for the technological products. To date, most firms in Taiwan are small-and-medium sized enterprise (SME). In general, the products they can produce are mostly low-risk. However, even in this situation, they need to strengthen their processing technology and look for more funds to improve their manufacturing capability. With more than 31 operating experience, the case company, denoted by C, is a typical SME that needs a suitable operation strategy at a particular turning point. Therefore, based on this need, the research thesis conducts a case study that uses the SWOT analysis to derive the operation strategy for the C company. Research findings and suggestions are as follows that C company: (1) should actively promote the exporting market: Taiwan’s market is tightly competitive due to its size is too small. The C company should enter into international market because of good specialists and manufacturing facilities; (2) should put more efforts on the research & development and increase the ability of quality testing; (3) should develop the cooperation projects with government and academic institutions to improve technology, information, management, and business benefits.
41
Kuo, Cheng-Hung, and 郭政宏. "A Study on The Business Strategy for the Heat Pipe Industry-Case on Company T." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/81241435117161339932.
Full textAbstract:
碩士國立臺灣科技大學
管理研究所
99
Abstract The heat dissipation problem has always been an effect on development of the electronic industry. Since the development of chip is going to follow Moore’s Law.Thermal skills on heat dissipation must have corresponding solutions. The advantages of heat pipe are high ability of thermal conductance, light, long use life, and etc. It has become one of the most important components in the electronic industry on the past ten years. Taiwan had already become the biggest R&D center and manufacturers in the world. The development on heat pipe industry has influenced the progress of computer industry. This essay is going to probe into the violent competition in the electronic industry that heat pipe industry has to be faced. How could the enterprises use their internal and external advantages in order to fight with such competitive environment .This research will use T Company as a single case.It will probe into its competition advantages on R&D and also its structure. Besides relevant analysis, this research will also use Porter Five forces analysis and dynamic SWOT analysis in order to probe into T Company’s management direction and strategies. The study result represents the heat pipe company was used to be considered as a traditional industry company. After carrying on the analysis of multiple anagement trategies and studying, it still can make its own Blue Ocean Strategy and selling direction. It can defense its position in the current industry and also establish a strong basis for its following management- development.
42
Chen, Shen-Ji, and 陳信吉. "O3/DI Compatibility Study with Drain Pipe and O3/DI Water Treatment in TFT/IC Industry." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/8p4aq4.
Full textAbstract:
碩士崑山科技大學
環境工程研究所
96
Feasibility study of activated carbon for ozone water treatment will be studied under various concentrations of solution pH values, dosage and species of activated carbon by batch reactor and column type reactor. The experimental results shows that the removal rate of aqueous ozone could be enhanced by the dosage of activated carbon at various solution pH value. Innovation of aqueous ozone detection, hydroxide ion dosage and activated carbon reaction behavior, we found the mechanism of aqueous ozone removal by activated carbon include not only adsorption and catalytic reaction but also direct reaction of aqueous ozone with activated carbon. The ozone water was removed dominantly by direct reaction with activated carbon at acidic solution, and that was destructed with hydroxide ion’s catalytic reaction at alkaline solution. The ozone water might be removed by way of tubing through vaporization or enhanced self-reaction. The order of O3 gas removal rate was: O3 gas reacted with activated carbon directly> O3 gas reacted with wetted activated carbon > O3 gas reacted with the activated carbon immersed in the water.
43
LIN-LIN, LI, and 李玲玲. "Study on Enterprise Diagnosis Making in Steel Pipe Fittings Industry — A Case Study of Company W." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/2s8xyc.
Full textAbstract:
碩士國立高雄應用科技大學
金融系金融資訊碩士在職專班
105
In the face of globalization international economic situation and regional integration trend, Taiwan’s SME’s only to strengthen business management and to enhance industrial competitiveness in order to meet complicated and volatile economic environment. Besides continue to innovate,it is at any time on the enterprise medical examination-enterprise diagnosis, early detection of potential problems and weaknesses and tow improve, in order to ensure the sustainable development of enterprises. The case study of W Company,diagnosis process from the inside out, step by step. First of all, the external analysis of the steel pipe fitting industry belonging to the case company, from the industry upstream and downstream, the development of the process and the current situation, industry characteristics and import and export ractices,industry revenue and profit status analysis, the industry development in Taiwan and SWOT analysis and five force analysis.Second,the case of company to diagnose and analyse the breakeven profit of the profit basis, and on production,marketing,human resources,research and development, finance, administration, information management for diagnosis, the use of scholars travel Chu-yi You’s Finance/Management/Strategy analysis(FMSA), and comprehensively summarizes the financial urgency indicators of the case company, improves the management feasibility index and the policy feasibility index,and after the cross-analysis, the case study of company development problem, and then put forwardthe propose solutions, as a reference to provide business to enhance business performance.
44
FAN, JIANG WEI-YU, and 范姜威宇. "HF-ERW pipe-making process analysis and application of SCADA in the scenario of Industry 4.0." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/3hrv22.
Full textAbstract:
碩士國立中央大學
機械工程學系在職專班
107
This thesis mainly introduces two themes, which are the analysis of the process of welded steel pipe and the application of SCADA (Supervisory Control And Data Acquisition) in the steel pipe industry. The part of the welded steel pipe process analysis is a comparison of the physical properties of three different SQ roller gaps. It can be found that the SQ roller gap is small and the pipe strength is strong and the elongation is poor. On the contrary, the SQ roller gap is large, and the pipe strength is weak and the elongation is good; SCADA's application in the steel pipe industry is to analyze the factors that mainly affect utilization rate of the pipe-making machine. It can be found that the main factor affecting utilization rate is the replacement of the size (mold replacement), which accounts for about half of the total downtime rate. if you can make appropriate adjustments to this, you should be able to improve the utilization rate of the pipe-making machine.
45
Wu, Yu-Tien, and 吳雨恬. "Research for Development and Diversification Strategies of Steel Industry in Taiwan - Case Study of Mayer Steel Pipe Group." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/22u4gh.
Full textAbstract:
碩士國立交通大學
管理學院經營管理學程
102
Abstract The iron and steel industry stands as a country's foundation and backbone in terms of industrial development. It facilitates the growth of other important and substantial basic industries, which are derived from the downstream of the iron and steel industry, and furthermore improves the industrial structure and promotes the overall economic development as a significant function. Hence, the advancement and development of a nation's iron and steel industry is highly valued and of cause for concern for the federal government. This study attempts to understand the current situation of Taiwan's iron and steel industry, including its market dynamics and challenges. Using Mayer Steel Pipe Corporation as a vehicle to scope into the details of the steel industry, this case study seeks to understand the environment and difficulties currently faced by the steel manufacturers. Future trends are analyzed and discussed, particularly how diversification is a growing important means for the the Mayer Group's revenues and profits. It is a vital aspect of business management for Mayer Steel Pipe, to continuously implement strategic adjustments and broader thinking, in order to adapt to the ever-changing political and economical environment, such that Mayer can materialize its goals of sustainable development.
46
LEE, IE-HSIAN, and 李逸湘. "Analysis on Strategic Competitiveness of API Carbon ERW Steel Pipe Industry in Taiwan – A Case Study of CHS." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/90964367996611394606.
Full textAbstract:
碩士國立中山大學
高階經營碩士班
95
Steel industry is highly connected to a lot of industries. In year 2007 Taiwan steel industry is the third industry, after warfer and electronic industry, which achieved hundred billion NTD in total years’s revenue. Taiwaness downstream industries, unlike Japanese and Korean, are mostly owned and managed by small and medium companies. Steel pipe is a long- hollow shaped material, massively adapted in fluid transportation, such as pretrolem, natural gas, water and steam etc. It is also heavily used in mechanic maching and structure engineering. This study focuses on API ERW carbon steel pipe industry in Taiwan. Analysis of pipe manufacture industry strategy is made upon the basis of theories like value chain, competitive strategy and game theory. Moreover, interviews with professionals and specialists are held to collect experiential wisdom regarding management and core competence ability. In another word, theory analyses together with interviews lead to the conclusion of competitive characteristics. Also, illustration of strategic competitiveness forming in CHS provides a practical example. How to evaluate the core competitive ability in Taiwan API ERW carbon steel pipe industry when facing global competition, that depends on every company’s unique global strategy. To sum up, this study describes and analyzes the current state of API ERW carbon steel pipe industry in Taiwan and summits the proposal of competitive strategies by taking CHS as an example.
47
Lin, Yi-Hsien, and 林怡嫺. "Opportunities and Challenges in mapping out strategies facing Taiwanese welded carbon steel pipe industry post signing of ECFA." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/20793322561987875470.
Full textAbstract:
碩士國立清華大學
經營管理碩士在職專班
103
Welded carbon steel pipe industry has existed in Taiwan for nearly 60 years, and thus making it an already mature product category. However, in recent years, Taiwan has seen itself in the middle of an economic downturn, combine that with a lack of major infrastructure projects, as well as industry migration to other less developed countries, all reasons which contributed to the gradual decline in output in many piping categories. A good example of that would be pipes used in furniture and automobile. Of course while the industry migration is taking shape, Taiwanese makers are also making moves to build offshore production base in order to better service its customers at on site locations. Currently, one of the biggest challenges facing Taiwanese pipe makers today is the pending agreement of ECFA, because once the agreement is officially signed between the two parties, the Ministry of Commerce will be forced to open up in excess of 200 plus steel categories to China, among them the welded carbon steel pipe category. Thus, if the Taiwanese steel pipe makers cannot raise its bar from a technical standpoint and develop higher quality product, or basically drive differentiation in its product range, then for sure they will be facing an uphill battle against the Chinese manufacturers who may flood the market with lower priced products. Given the competitive environment facing Taiwanese steel makers, how should these makers respond in order to maintain its viability? This study will focus on the challenges facing Taiwanese welded carbon steel pipe makers amidst the passing of ECFA, to devise strategy and offer suggestions to these makers in order to assist them to achieve sustainability.
48
Lee, Min-Tsung, and 李銘崇. "Key factor in industrial competitiveness Comparison—the case study for steel pipe with steel structure industry in Taiwan." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/14097890116481248655.
Full textAbstract:
碩士國立高雄應用科技大學
工業工程與管理系
97
Steel pipe and steel structure industry is an important related downstream industry among iron industries, which also belongs to the basic metal processing industry. Due to the widespread usage of this product at home and abroad, ranging from major construction projects to national defense construction, this kind of industry always has been concerned by government and user. In addition, for the sake of steel pipe and steel structure industry as an important traditional industry with time trend, the quality requirement is getting more and more stringent. As a result, the product has been converted to a small amount of diversification with no planned production, which requires big space of operation and storage, and the capital demands more, in particular the highly competitive environment between internal and external similar product. Therefore, the profit becomes less and less as the long-term development of space is often limited by the related industry competition (the upstream and downstream industries) in terms of the direct and indirect effects. Thus, according to the relevant literature with practical experience for industry, this study consulted through the production, officials, academics and experts to investigate and interview. After careful consideration and modify the questionnaire design, which aims at upstream and downstream related industries respectively, the result of questionnaire survey is involved with the industry's key internal and external environmental factors. This study makes use of the statistical analysis software of SPSS 12.0 to compare the steel pipe industry and steel structure industry as well as the importance degree of internal with external environment. The obtained results are as follows： Internal environmental factors: the importance degree of steel structure industry is higher than that of steel pipe industry, such as the aspects of "human resources", "production management", "production technology and research and development", "financial structure and management", "information management", "quality management" and "the active participation of operators" ; Only in the aspect of "marketing management", the importance degree of steel pipe industry is higher than that of steel structure industry. External environmental factors: the importance degree of steel structure industry is higher than that of steel pipe industry, such as the aspects of "production equipment and improvement," "domestic market information," "foreign market information," "products liberalization degree" and "cooperation relationship"; in the aspect of "raw materials obtain" and "domestic amended laws", the importance degree of steel pipe industry is higher than that of steel structure industry.
49
Silva, Moisés Gomes da. "Riscos de vazamentos, incêndios e explosões em terminais petroquímicos ocasionados pela falta de integridade física em tubulações industriais." Master's thesis, 2014. http://hdl.handle.net/10316/38569.
Full textAbstract:
Dissertação de Mestrado em Segurança aos Incêndios Urbanos apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra.O processo de transporte, transferência e armazenamento de produtos químicos a base de hidrocarbonetos é feito através de condutos fechados denominados tubos e acessórios que precisam de estar adequados e bem conservados para o transporte desses materiais altamente voláteis e inflamáveis, que requerem um cuidado todo especial para que seja evitado o vazamento destes produtos que, na maioria das vezes, desencadeiam incêndios e explosões, gerando sempre muitas perdas financeiras e, o que é muito pior, vidas humanas. O objetivo deste trabalho é fazer uma avaliação geral dos riscos de vazamentos, incêndios e explosões nos quais os terminais petroquímicos estão expostos fazendo a identificação e o levantamento da falha que leva ao acidente devido ao fator corrosão, e após o acidente acontecer, colocarmos em prática os meios de mitigação adequados para evitar a expansão dos impactos sociais, económicas e ambientais. Para aplicação desta metodologia, selecionou-se o Terminal Petroquímico de propriedade da Petrobras Transportes, localizado na cidade de São Luis, capital do Estado do Maranhão – Brasil, onde foram aplicados os principais Métodos de Análise de Riscos de Incêndios em suas edificações e como aplicação prática foi feito a inspeção por ultra-som em uma linha de transporte de GLP – Gás Liquefeito de Petróleo, para acompanhamento do controlo da integridade física. Os resultados encontrados demonstraram que os métodos de análise de riscos contribuem de maneira satisfatória para identificar e aumentar a segurança contra os riscos catastróficos, porém são vulneráveis em suas aplicações em projetos e em plantas industriais por não considerarem a possibilidade de falhas simultâneas no sistema, necessitando de outros tipos de avaliações para aumentar a segurança em níveis aceitáveis. Já a técnica de inspeção medição de espessura por ultra-som nos deu uma avaliação representativa quanto controlo da corrosão, onde os resultados encontrados nos dará plenas condições de nos anteciparmos de forma preventiva quanto aos perigos de uma possível ruptura na linha devido aos desgastes sofridos ao longo do tempo
The process of transport, transfer and storage of chemicals to hydrocarbon based products is done through closed conduits named pipes and fittings that need to be appropriate and wellmaintained to transport these highly volatile and flammable materials which require special care to the leakage thereof which, in most cases, trigger fires and explosions is avoided, when generating a lot of financial losses and what is worse, human lives. The objective of this work is to make a general assessment of the risks of leaks, fires and explosions in which the terminals are exposed doing petrochemical identification and survey the flaw that leads to accidents due to corrosion factor, and after the accident happens, put into practice adequate to prevent the expansion of social, economic and environmental impacts means of mitigation. For application of this methodology, we selected the Petrochemical Terminal owned by Petrobras Transport, located in the city of São Luis, capital of Maranhão - Brazil, where the main methods of Fire Risk Analysis were applied in their buildings and how application practice inspection was made by ultrasound in a transmission line LPG - Liquefied Petroleum Gas, for monitoring the control of physical integrity. The results showed that the methods of risk analysis contribute satisfactorily to identify and increase security against catastrophic risks, but are vulnerable in their applications in projects and industrial plants do not consider the possibility of concurrent failures in the system, requiring other types of assessments to increase security at acceptable levels. Already inspection technique thickness measurement by ultrasound gave us a representative assessment as corrosion control, where the results will give us anticipate the full conditions of a preventive way about the dangers of a possible break in the line due to wear suffered by over time.
50
Ravuri, Venkata Krish Meher Surendra. "Investigation of Swirl Flows Applied to the Oil and Gas Industry." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-446.
Full textAbstract:
Understanding how swirl flows can be applied to processes in the oil and gas industry and how problems might hinder them, are the focus of this thesis. Three application areas were identified: wet gas metering, liquid loading in gas wells and erosion at pipe bends due to sand transport. For all three areas, Computational Fluid Dynamics (CFD) simulations were performed. Where available, experimental data were used to validate the CFD results. As a part of this project, a new test loop was conceived for the investigation of sand erosion in pipes.
The results obtained from CFD simulations of two-phase (air-water) flow through a pipe with a swirl-inducing device show that generating swirl flow leads to separation of the phases and creates distinct flow patterns within the pipe. This effect can be used in each of the three application areas of interest.
For the wet gas metering application, a chart was generated, which suggests the location of maximum liquid deposition downstream of the swirling device used in the ANUMET meter. This will allow taking pressure and phase fraction measurements (from which the liquid flow rate can be determined) where they are most representative of the flow pattern assumed for the ANUMET calculation algorithms.
For the liquid loading application, which was taken as an upscaling of the dimensions investigated for the wet gas metering application, the main focus was on the liquid hold-up. This parameter is defined as the ratio of the flowing area occupied by liquid to the total area. Results obtained with CFD simulations showed that as the water rate increases, the liquid hold-up increases, implying a more effective liquid removal. Thus, it was concluded that the introduction of a swirler can help unload liquid from a gas well, although no investigation was carried out on the persistance of the swirl motion downstream of the device.
For the third and final application, the erosion at pipe bends due to sand transport, the main focus was to check the erosion rate on the pipe wall with and without the introduction of a swirler. The erosion rate was predicted by CFD simulations. The flow that was investigated consisted of a liquid phase with solid particles suspended in it. The CFD results showed a significant reduction in erosion rate at the pipe walls when the swirler was introduced, which could translate into an extended working life for the pipe. An extensive literature review performed on this topic, complemented by the CFD simulations, showed the need for a dedicated multiphase test loop for the investigation of sand erosion in horizontal pipes and at bends. The design of a facility of this type is included in this thesis.
The results obtained with this work are very encouraging and provide a broad perspective of applications of swirl flows and CFD for the oil and gas industry.