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Dissertations / Theses on the topic 'Pump mixers'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Abid, Kifah Hussain. "New modelling and measurement techniques for liquid-liquid hold-up distribution in agitated tanks." Thesis, University of Bradford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358832.

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2

Agrell, Elias. "Analys av massapumps- och mixerarbete vid Metsä Board Sverige AB, Husums Fabriker : Energibesparingsåtgärder vid blekeri 4 & 5 med jämförelse mot ny utrustning." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-93626.

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Husums plant has a selection of different pulp pumps at bleaching plant 4 and 5. The displacement- (HC-pump, Sund Defibrator PTD-60) and centrifugalpumps (MC-pump, MCA 42-200, MCP 30/20) are of interest in this report. The centrifugal pumps are controlled by throttle valves, which result in an energy loss. Chemical mixers are used to mix ClO2 into the pulp before proceeding into a holding tower where the bleaching process occurs. The energy demand of the different positions has been measured or calculated to be used in comparisons against new equipment. Quotations were requested and delivered

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3

Shamsolahi, S. "LDA investigation of flow in a stable mixed-flow pump model." Thesis, University of Strathclyde, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382495.

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4

Ozgen, Onur. "Design Improvements On Mixed Flow Pumps By Means Of Computational Fluid Dynamics." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/2/12608093/index.pdf.

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The demand on high efficiency pumps leads the manufacturers to develop new design and manufacturing techniques for rotodynamic pumps. Computational Fluid Dynamics (CFD) software are started to be used during the design periods for this reason in order to validate the designs before the pumps are produced. However the integration process of CFD software into the design procedure should be made carefully in order to improve the designs. In this thesis, the CFD software is aimed to be integrated into the pump design procedure. In this frame, a vertical turbine type mixed flow pump is aimed to be

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5

Kannappan, Karthik. "Design studies towards mixers and pumps based on electrochemically active conducting polymers for microfluidic devices." Thesis, University of Auckland, 2011. http://hdl.handle.net/2292/17352.

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This thesis concerns the design of mixers and pumps for microfluidic devices, based on the actuation and ion-exchange properties of electrochemically active conducting polymers (ECP). Electrochemical oxidation or reduction of these polymers is accompanied by ion-exchange with the electrolyte and an associated change of volume. The thesis proposes that this volume change can be utilised for the purpose of mixing and pumping, in which the electrochemical cell is formed within a microfluidic structure and the motion is induced in the electrolyte as a consequence of redox reaction of the po

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6

Cirit, Ali. "Design And Performance Evaluation Of Mixed Flow Pumps By Numerical Experimentation And Axial Thrust Investigation." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/2/12608972/index.pdf.

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In this thesis a vertical turbine mixed flow pump that has a flow rate of 40 l/s and 16 mwc head at 2900 rpm is designed. Effect of design parameters are investigated and flow inside the pump is analyzed with the help of numerical experimentations. The designed pump is manufactured and tested in Layne Bowler Pumps Company and completed in T&Uuml<br>BiTAK - TEYDEB project. Pump is designed in the tolerance limits that are defined in the standard TS EN ISO 9906. Numerical experimentation results for performance charecteristics show the same trend with the test results. In addition, axial thrus

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7

Dupoiron, Marine Agnes Nicole. "The effect of gas on multi-stage mixed-flow centrifugal pumps." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/273361.

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The production from an oil reservoir is a mixture of liquids (oil and water) and gas, and is often maintained by using a pump placed in the well to ensure a continuous flow to the surface. Electrical Submersible Pumps consist of stacked centrifugal pump stages, each comprising a bladed impeller (rotating part) and diffuser (stationary part). In multiphase conditions, the gas tends to accumulate in the impeller, severely reducing the pressure produced by the pump. Radial-flow pumps operate in a plane perpendicular to their rotation axis, while mixed-flow pumps are characterised by a lower merid

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8

Péan, Thibault Q. "Heat pump controls to exploit the energy flexibility of building thermal loads." Doctoral thesis, Universitat Politècnica de Catalunya, 2020. http://hdl.handle.net/10803/669805.

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Smart controls for heat pumps are required to harness the full energy flexibility potential of building thermal loads. A literature review revealed that most strategies used for this purpose can be classified in two categories: simpler rule-based control (RBC), and model predictive control (MPC), a more complex strategy based on optimization and requiring a prior model of the systems. Both RBC and MPC can use external penalty signals to prompt their actions. The price of electricity is most often used for this purpose, leading to strategies of cost reduction. As an alternative penalty signal,

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9

Sukanya, Kamphayae. "Utilization and development of liquid brewer’s yeast mixed with cassava pulp for cattle feed." Kyoto University, 2017. http://hdl.handle.net/2433/225320.

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10

Adelegan, Joseph Akinkugbe. "Green Investment and Organizational Performance: Evidence from the Nigerian Pulp and Paper Industry Using Mixed Methods." Case Western Reserve University Doctor of Management / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=casedm1568628000999998.

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11

Gong, Hua. "3D Printing for Microfluidics." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/7690.

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This dissertation focuses on developing 3D printing as a fabrication method for microfluidic devices. Specifically, I concentrate on the 3D printing approach known as Digital Light Processing stereolithography (DLP-SLA) in which serially projected images are used to sequentially photopolymerize layers to build a microfluidic device. The motivation for this work is to explore a much faster alternative to cleanroom-based microfabrication that additionally offers the opportunity to densely integrate microfluidic elements in compact 3D layouts for dramatic device volume reduction. In the course of

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12

Magnusson, Mikael S. "Testing and Evaluation of Interfibre Joint Strength under Mixed-Mode Loading." Licentiate thesis, KTH, Hållfasthetslära (Inst.), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-116700.

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The failure properties of interfibre bonds are the key for the build-up of strength in fibrous materials such as paper and paperboard. In order to tailor the properties of such materials by chemical or mechanical treatments and to learn how such modifications influence the properties at a microscopic level, direct measurement of individual fibre--fibre crosses are typically performed. However, the state of loading in the interfibre joint, in testing of individual fibre--fibre crosses, is in general very complex and a greater understanding for how to evaluate the mechanical properties of interf

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13

Kleist, Anders. "Theory of super power saving circuits and configurations for mixed signal CPU for smartcard application." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2326.

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<p>Designing an application specific integrated circuit (ASIC) must be starting with careful preparations, otherwise the chip will not be as good as possible. The theoretical studies must cover everything from the chip circuits to the application structure. In mobile applications there is extremely important that the current consumption becomes minimized because the battery power is limited. The power reductions studies must include the most power costing circuits on the chip. When the whole circuit or segments of the circuit is not in use, they must switch fast and simple into another mode th

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14

Megow, Jörg. "Excitation energy transfer in pheophorbide a complexes." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2013. http://dx.doi.org/10.18452/16673.

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Die Arbeit untersucht den Anregungsenergietransfer in supramolekularen Phäophorbid-a-Komplexen. Das P4- und das P16-Molekül bestehen aus vier bzw. sechzehn Phäophorbid-a-Molekülen. Die Komplexe werden in explizitem Lösungsmittel im Rahmen einer gemischt quanten-klassischen Methode untersucht. Klassische Molekulardynamik-Simulationen werden durchgeführt. Die zeitabhängige Schrödingergleichung wird gelöst, der entsprechende Hamiltonoperator hängt parametrisch von den Kernkoordinaten ab. Es wird eine Methode vorgestellt, die die Berechnung des Schwingungsbeitrags der Koordinatenabhängigkeit in ha

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15

Morgan, Christine A. "Localization, cloning, and identification of the tdt genes from Pseudomonas sp. A19-6a and their distribution in pulp mill mixed liquor treatment systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0006/NQ42801.pdf.

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16

Morgan, Christine A. (Christine Ann) Carleton University Dissertation Biology. "Localization, cloning and identification of the TDT genes from Pseudomonas sp. A19-6a and their distribution in pulp mill mixed liquor treatment systems." Ottawa, 1999.

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17

Oluleye, Oluwagbemisola Olarinde. "Integration of waste heat recovery in process sites." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/integration-of-waste-heat-recovery-in-process-sites(ebbc2669-2c9b-40be-9eae-8d2252f0286f).html.

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Exploitation of waste heat could achieve economic and environmental benefits, while at the same time increase energy efficiency in process sites. Diverse commercialised technologies exist to recover useful energy from waste heat. In addition, there are multiple on-site and offsite end-uses of recovered energy. The challenge is to find the optimal mix of technologies and end-uses of recovered energy taking into account the quantity and quality of waste heat sources, interactions with interconnected systems and constraints on capital investment. Explicit models for waste heat recovery technologi

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18

Terlemez, Bortecene. "Oscillation Control in CMOS Phase-Locked Loops." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4841.

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Recent advances in voltage-controlled oscillator (VCO) design and the trend of CMOS processing indicate that the oscillator control is quickly becoming one of the forefront problems in high-frequency and low-phase-noise phase-locked loop (PLL) design. This control centric study explores the limitations and challenges in high-performance analog charge-pump PLLs when they are extended to multiple gigahertz applications. Several problems with performance enhancement and precise oscillator control using analog circuits in low-voltage submicron CMOS processes, coupled with the fact that analo

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19

Bezte, Candi Lynne. "Alterations in biochemistry and morphology of feral fish downstream from an untreated groundwood/sulphite pulp mill discharge and characterization of the effluent induced mixed-function oxygenase response." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq23223.pdf.

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20

Hooper, Mark S. "Submicron CMOS programmable analog floating-gate circuits and arrays using DC-DC converters." Diss., Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-12032004-155022/unrestricted/Hooper%5FMark%5FS%5F200505%5Fphd.pdf.

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Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2005.<br>Kucic, Matthew, Committee Member ; Hasler, Paul, Committee Chair ; Heck, Bonnie, Committee Member ; Cressler, John, Committee Member ; Anderson, David, Committee Member. Vita. Includes bibliographical references.

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21

Durrant, Camille. "A Conceptual Model of Groundwater Flow at the Midway, Utah Fish Hatchery as Constrained by Geochemical, Physical Hydrogeological, and Geophysical Methods." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd724.pdf.

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22

Oliveira, Olga Margarida Fajarda. "Network topology discovery." Doctoral thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/18692.

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Doutoramento em Matemática<br>A monitorização e avaliação do desempenho de uma rede são essenciais para detetar e resolver falhas no seu funcionamento. De modo a conseguir efetuar essa monitorização, e essencial conhecer a topologia da rede, que muitas vezes e desconhecida. Muitas das técnicas usadas para a descoberta da topologia requerem a cooperação de todos os dispositivos de rede, o que devido a questões e políticas de segurança e quase impossível de acontecer. Torna-se assim necessário utilizar técnicas que recolham, passivamente e sem a cooperação de dispositivos intermédios,

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23

Mantilla, Gutierrez Weimar. "Towards Flexible Power Generation Short-term Optimization of a Combined Cycle Power Plant Integrated with an Inlet Air Conditioning Unit." Thesis, KTH, Energiteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-263904.

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Combined cycle gas turbine power plants (CCGT), as part of the electricity generation fleet, are required to improve their flexibility to help balance the power system under new scenarios with high shares of variable renewable sources. Among the different possibilities to enhance the power plant performance, an inlet air conditioning unit offers the benefit of power augmentation and “minimum environmental load” reduction by controlling the gas turbine intake temperature using cold thermal energy storage and a heat pump. In this thesis, an evaluation of the conditioning unit impact over a power

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24

Waldemarsson, Martin. "Planning production and supply chain in energy intensive process industries." Doctoral thesis, Linköpings universitet, Produktionsekonomi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-112289.

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To make a difference among the energy intensive process industries, this dissertation addresses production planning and supply chain planning problems related to industrial energy management issues. The energy issue is turning more and more important from different angles, involving price as well as environmental problems due to climate change leading to political pressure on all energy users. The process industry sector is one of the largest users of energy, and thus important to analyse. Process industries are also capital intensive and operate on large and expensive process equipment, makin

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25

Drozd, Michal. "Vybrané části stavebně technologického projektu psychiatrické kliniky Fakultní nemocnice Brno." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409919.

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The subject of my diploma thesis are selected parts of the construction technology project of the psychiatric clinic of the University Hospital Brno based on the provided project documentation. It is an extension of a new six-storey building to the existing buildings. The thesis contains a technical report to the construction technology project, the coordination situation of the construction, the situation of wider transport routes, time and financial plan by objects, study of the realization of the main technological stages, a site equipment design, a design of a machine set, technological re

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26

Esqueda, Merino Donovan Manuel. "Contrôle/Commande avancé pour l'optimisation du confort thermique d'un véhicule électrifié." Phd thesis, Supélec, 2013. http://tel.archives-ouvertes.fr/tel-00969132.

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Dans cette thèse nous développons des structures de supervision permettant de définir des consignes optimales pour des actionneurs thermiques, ainsi que des stratégies de commande appropriées pour le pilotage d'une pompe à chaleur (PAC). Pour répondre à ces objectifs, plusieurs étapes ont été réalisées :- Modélisation orientée commande d'une PAC réversible, des thermistances, et de l'environnement permettant de les lier à l'intérieur de l'habitacle. Des modèles physiques ont été définis et intégrés dans une plateforme du type Model-in-the-Loop pour permettre a posteriori la validation des stra

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27

Gabriel, Jan. "Obytný soubor Nový Žižkov - stavebně technologický projekt." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392137.

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The subject of this diploma thesis is the elaboration of a construction technological project for the construction of a residential complex Nový Žižkov in Poděbrady, where I will focus on the technological stage of the gross building of the main building SO-01 apartment building – section BI+BII (56 dwelling units). The supporting system of the building is composed of a combination of monolithic reinforced concrete structures and ceramic blocks. The foundation of a residential building is designed as a reinforced concrete basin with reinforcing ribs. The diploma thesis contains a text and atta

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28

Malý, Filip. "Stavebně technologický projekt výstavby polyfunkčního domu lokalita Nová Nitra." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225445.

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The content of this thesis is the construction project of technological multifunctional building new locality Nitra the Slovak Republic. Individual points outline the project, which are dealt with in this thesis can be divided into subcategories, depending on the type of information provided. The first category can include items such as a technical report to the STP, which describes the basic information about the objects constructed building including the construction situation, location of the site including links to transport and technical infrastructure and rough timetable for the construc

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29

Ma, Fei-Chi, and 馬茀綺. "Novel EHD Pump Driven Micro Mixers." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/57524906619225112266.

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碩士<br>國立成功大學<br>航空太空工程學系碩博士班<br>90<br>Due to the maturity of MEMS( Micro-Electro-Mechanical-System ) technology recently, it can be broadly used in many different applications, for example: optoelectronics, chemical, biochemical test, mechanical, aerospace…etc.. μTAS( Micro Total Analysis System) uses MEMS technology to minimize and integrate analytical equipments into a credit-card sized biochip which includes sampling, sample transport, reaction, separation and detection functions. In the mixing of sample and reagent, it used external disturbance to generate turbulent flow to enhance mixing.

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30

Chan, WenYen. "MIXED PHASE COMPRESSION HIGH EFFICIENCY HEAT PUMP." Thesis, 2014. http://hdl.handle.net/10012/8292.

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The objective of this thesis is the design and realization of a higher efficiency air source heat pump. The improved pump???s operating cost must rival the cost of heating with natural gas, while incurring a minimal increase in the capital cost of the pump. A COP greater than 4 at ???15C ambient is needed to achieve this goal. During winter season testing a COP of 4.25 +/- 0.11 was observed. This tracks well with a predicted COP of 4.4 and also against a commercial system with a claimed COP between 2.1 and 3.0.

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31

Hsu, Shu-Cheng, and 許書政. "The design of a mixed pump of air and water." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/x5am5r.

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碩士<br>崑山科技大學<br>機械工程研究所<br>91<br>In this study, a mixed water and air transportation model is established. In order to obtain the massive imported air and optimum water circulation, a combined design of centrifugal pump and fan is made. The influence of the jet flow on the flow field is studied. Based on the above results and utilizing experience design method the parameters of mixed pump are determined. The corresponding grid files are generated. Importing the files and running the CFD software, the performance and the flow field of the pump and the fan can be obtained. In the mean while, the

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32

Hung, Tzuo-Min, and 洪佐旻. "Design and Analysis of a Mixed-Flow Pump Used in Artificial Heart." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/35157459922325784155.

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碩士<br>國立成功大學<br>航空太空工程學系碩博士班<br>92<br>Abstract 　　Electro-Hydraulic power is the driving mechanism adopted on the NCKU Left Ventricular Assist Device (LVAD) and Total Artificial Heart (TAH). The huge size of conventional pneumatic driving system would cause great inconvenience to the patients in post-surgical daily life. The development of this hydraulic system can significantly reduce the volume of the driver, and the patients can acquire good activity and better quality of life as well. For this purpose, a practical and highly effective hydraulic pump design is one of the most important t

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33

Liao, Shao-Kai, and 廖紹凱. "A Novel Vortex Mixer Actuated by One-Shot Electricity-Free Pumps." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/yn8c7z.

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碩士<br>國立臺北科技大學<br>能源與冷凍空調工程系碩士班<br>100<br>Effective mixing is vitally important to many microfluidic devices in the areas of biotechnical industries, analytic chemistry and medical industries. However, most micro-mixers require complicated fabrication procedures, maybe improper for practical microfluidic utilization. These mixers generally operate under low Reynolds-number conditions, causing a relatively long reaction time in various biochemical processes. This study presents a novel hemisphere-shaped vortex mixer to rapidly mix two liquids with simple geometric structure. To simulate mixing

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34

Bello, João Coelho Capela Guimarães. "Mass Balance to the Production of Polyhydroxyalkanoates from Mixed Microbial cultures with Fruit Pulp." Master's thesis, 2019. http://hdl.handle.net/10362/120729.

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Bioplastics, specially polyhydroxyalkanoates(PHA), represent one of the best alterna tives to plastics from non-renewable sources. The production of PHA, from mixed micro bial cultures with low-cost feedstocks, as in this dissertation fruit pulp requires a process of three stages: treatment of the residues through anaerobic digestion which is used to feed both the selection and accumulation reactor. The biomass PHA-accumulating selec tion reactor is carried out on a feast and famine regime with uncoupled feeding from nitro gen an carbon, leading to increased selective pressure, where a ratio

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35

Hsieh, Zong-Han, and 謝宗翰. "Study on the Design and Implementation of High-Conversion-Ratio 4-phase Mixed-Structure Charge Pumps." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/84264755857688733159.

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碩士<br>逢甲大學<br>電子工程所<br>99<br>This thesis presents a novel low-voltage high pumping gain of charge pump DC/DC voltage regulators utilizing the voltage-control circuits and mixed-structure mode to generate boosted output voltage. In original, most of charge pumps transfer charges by MOSFET. The performances are affected by threshold voltage, and therefore couldn’t apply in low-voltage applications. Besides, another problem is the body effect when the structure is more than single-stage that will limit the pumping gain. Thus, this novel charge pump circuit is cancels both of threshold voltage and

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36

洪妙珠. "Effect of cationic starches and mixed office wastepaper pulp contents on the retention and the handsheet properties in the neutral papermaking system." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/75815330938836516393.

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碩士<br>國立屏東科技大學<br>森林系<br>91<br>Using recycled fiber as part of the stuff for papermaking has been a necessity. The application of recycled fiber, however, would affect the final strength properties of the products due to the drying and rewetting of the fibers. Starch, especially cationic starch was thus used to mitigate the defect. The objectives of this study are to evaluate the effect of the cationic starch dosage and the adoption of recycled mixed office waste (MOW) fiber on the retention and handsheet properties in the currently mainstreamed neutral papermaking system. The resul

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Ramos, Marta Luísa Silva. "PHAs from mixed cultures as biopolymers for biodegradable films and flowerpots for plant transport." Master's thesis, 2019. http://hdl.handle.net/10362/89764.

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Polyhydroxyalkanoates (PHAs) are biodegradable bioplastics with potential for fossil-based plastics’ replacement, that can be produced by mixed microbial cultures (MMC) from wastes. In this thesis, the possibility of PHAs synthesis from pulp and paper wastes, for the production of films and flowerpots for plants transport, was assessed. The PHAs production by MMC was carried out in a 3-stage process. After selection of the residues able to produce volatile fatty acids, the acidogenic fermentation stage consisted in their fermentation in reactor under different operating conditions. In the PHAs

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38

Mateus, Sara Alexandra Anacleto. "From fruit pulp wastes to biomethane: assessment of substrate shifts on the performance of a two-stage anaerobic system and biogas upgrading studies." Master's thesis, 2017. http://hdl.handle.net/10362/25627.

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Wastes with high organic content, such as food waste, are produced worldwide and can cause serious pollution problems when poorly managed. Thus, there is the need for the implementation of environmental friendly treatment systems for organic wastes. Anaerobic digestion has the potential to contribute for the sustainable treatment of these wastes while producing biogas which provides a renewable energy source, methane (CH4). In this study, a two-stage anaerobic system was operated treating three different fruit pulp wastes (peach, raspberry and white guava) in a sequential operation. The effec

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39

Zhang, He. "Optimal sizing and operation of pumping systems to achieve energy efficiency and load shifting." Diss., 2011. http://hdl.handle.net/2263/28132.

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This dissertation presents a pumping system operation efficiency improvement solution that includes optimal selection and control of the water pump. This solution is formulated based on the performance, operation, equipment and technology (POET) framework. The focus is on the minimization of the operational energy cost. This efficiency improvement solution is divided into three stages in accordance with the operation category of the POET framework. The first stage is to select the optimal pump capacity by considering both energy efficiency and load shifting requirements. The second stage is to

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