Academic literature on the topic 'Pumping machniery Design and construction'
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Journal articles on the topic "Pumping machniery Design and construction":
1
Journal, Baghdad Science. "Design and Construction Optical Pumping System." Baghdad Science Journal 10, no. 2 (June 2, 2013): 462–71. http://dx.doi.org/10.21123/bsj.10.2.462-471.
Abstract:
In this work the design and construction of optical pumping system was presented. The parameters of the pumping source to obtain discharge current density sufficient to shift the flash lamp spectrum towards uv portion of spectrum were measured.The current density was supplied to the flash lamp must be greater than 4000Amp./cm2 to obtain the spectral range wavelength lies between 0.2 and 0.35?m. The current density was obtained by a capacitor 50?F, at 7KV discharge voltage. The applied electrical energy to the flash lamp was more than 1200 J, and the current density was around 5000 Amp./cm2.The electrical parameters of the flash lamp were calculated. The impedance parameters(K0) from the voltage and the peak current pulse was measured in range equal to 57, while the damping factor(?) was 1.3. The energy of the flash lamp was around 75% from the input electrical energy. The external trigger circuit was limited the increase the applied voltage, which is responsible for the damping factor.
2
Journal, Baghdad Science. "Design and construction Optically Gas Laser." Baghdad Science Journal 10, no. 4 (December 1, 2013): 1223–31. http://dx.doi.org/10.21123/bsj.10.4.1223-1231.
Abstract:
In this work the design and construction of a flash photolysis pulsed HCl laser was presented. The parameters of the pumping source and discharge current density was obtained, which sufficient to shift the flash lamp spectrum towards uv portion of spectrum. The maximum pulse laser energy parameters was measured. Total pressure and ratio of active gases to optimized the output pulse energy were measured , where at 125 mbar of total pressure and 1:7:14 Cl2:H2: He ratio, the laser energy was measured to be 200 mJ at pumping four flash lamps energy in the order of 6400J .The resonator consists of copper a near hemispherical mirror with the radius of curvature 3m coated by gold and reflectivity 98%,the output coupler sapphire mirror of 63% reflectivity . Total efficiency of the system was measured to be 0.0125% .
3
BENNETT, M. B., I. G. HARMOND, R. A. LEGG, and J. LEWIN. "Design and Construction of the Isle of Dogs Pumping Station." Water and Environment Journal 2, no. 3 (June 1988): 319–31. http://dx.doi.org/10.1111/j.1747-6593.1988.tb01296.x.
4
Ba, Ling Zhen, Yi Bo Yang, Song Liang, Hai Hong Mo, Hong Cao, Ting Jin Liu, and Jun Sheng Chen. "Progress in Study of Concrete Pumping Construction Techniques in Super High-Rise Building." Key Engineering Materials 405-406 (January 2009): 110–16. http://dx.doi.org/10.4028/www.scientific.net/kem.405-406.110.
Abstract:
To super high-rise building, concrete pumping construction is an inevitable choice. This paper introduces the application status and development trend of concrete pumping construction in the super high-rise projects at home and abroad, introduces high-rise pumping concrete from the selection of raw material, mix design, performance evaluation and so on, sums up technical specification of concrete pump and pumping concrete pipe-laying method, in order to provide reference for the high-rise concrete pumping construction in Guangzhou West Tower.
5
Xu, Li Bin, Nai Qian Feng, and Ch'ng Guan Bee. "Research on Ultrahigh Pumpability of C80 HS & HP Concrete." Applied Mechanics and Materials 291-294 (February 2013): 980–86. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.980.
Abstract:
The concrete technology has seen great improvement with the construction of large numbers of ultrahigh buildings at a height of more than 400 meters worldwide. It has been a research hotspot in the field of concrete recently to discuss how to reduce pumping resistance, avoid pumping block and meet the requirements of ultrahigh pumping (h>400m), especially the challenge of the ultrahigh pumping of HS & HP concrete with larger pumping resistance. This paper researches the selection of raw materials and design of mix proportion of C80 concrete used in the construction, and introduces the workable evaluation index, pumpability and pumping project in relation to the ultrahigh pumping of C80 concrete mixture, according to the construction requirements of the one-off pumping height (412 meters) for the C80 HS & HP concrete used in West Tower Project of Zhujiang (Pearl River) New Town in Guangzhou-- the tallest building in South China Region of mainland China.
6
Sargent, D. W., R. D. Beckie, and G. Smith. "Design and performance of deep well dewatering: a case study." Canadian Geotechnical Journal 35, no. 1 (February 1, 1998): 81–95. http://dx.doi.org/10.1139/t97-077.
Abstract:
This paper reviews the process used to design the construction dewatering system at the Influent Pumping Station at Annacis Island Wastewater Treatment Plant. The design process followed the "observational method," as applied to soil mechanics by K. Terzaghi and set out by R.B. Peck in the Ninth Rankine Lecture. The design was based on a working hypothesis of behaviour anticipated under the most probable conditions identified in the data gathering and assessment program. The sensitivity of the design was evaluated by considering potentially unfavourable conditions evident in the available data. The design development included a review of monitoring feedback obtained during the pumping-well installation, a pumping test, and the dewatering system start-up. The monitoring program and review process are presented.Key words: dewatering, observational method, case study, pumping test.
7
Rauf Huseynli, Rauf Huseynli. "PURPOSE AND DESCRIPTION OF THE COMPRESSOR STATION." PAHTEI-Procedings of Azerbaijan High Technical Educational Institutions 06, no. 02 (April 9, 2021): 53–57. http://dx.doi.org/10.36962/pahtei0602202153.
Abstract:
All work on the construction of pumping and compressor stations is usually divided into two groups of zero cycle work and ground cycle work. The work of the zero cycle includes the preparation of the construction site, earthworks, work on the construction of foundations for buildings, pumping units and technological equipment, work on the construction of underground pipelines and utilities. The work of the ground cycle includes work on the construction of buildings for pumping and compressor shops and auxiliary buildings, installation work on installation and fixing on the foundations in the design position of pumping units. Compressor stations (CS) have been installed along the pipeline route to maintain a certain flow rate of the transported gas and to ensure optimal pressure in the pipeline. A modern compressor station is a complex engineering structure that provides the basic technological processes for the preparation and transportation of natural gas. Keywords: compressor stations, gas pipeline, building structure, Booster compressor stations.
8
Liu, Qing. "Study on the Oil Pipeline Design of R Oil Field." Frontiers Research of Architecture and Engineering 3, no. 3 (December 14, 2020): 40. http://dx.doi.org/10.30564/frae.v3i3.2453.
Abstract:
It’s a compressive article consists of three parts, an overview of pipeline development in China, oil pipeline design for R oilfield and pipeline management suggestions. First, this article introduces the current status of pipeline construction, oil pipeline technology and gas pipeline technology in China in recent years. The current status of China’s pipeline construction is divided into three stages. In terms of construction, pipeline construction is developing in the direction of intelligence and modernization. Long-distance oil pipelines require technical breakthroughs in two aspects. One is the sequential oil product delivery technology to improve the type of oil that can be delivered sequentially; the second is the viscosity reduction delivery technology for heavy oil. Gas transmission pipelines are developing in the direction of high pressure, large diameter and high steel grade. Secondly, based on all the pipeline development above, in order to meet the development of R oil field, an oil-water two-phase pipeline transportation design and a pipeline crossing river design were carried out. Under the condition of the design pressure of the pipeline of 5.5MPa, it is preferable to produce a pipeline of φ219×6.5mm, and the steel grade of the pipeline is L360. A heating station and pumping station are needed in the transportation process, and the heating station and pumping station are combined for one construction. Considering that the strata of the river crossing section are mainly gravel sand layer, clay layer and non-lithological stratum, horizontal directional drilling (HDD) is adopted for river crossing, and suggestions are made for the construction process. Finally, after the pipeline was put into production, the corresponding auxiliary production system and supporting engineering suggestions were put forward.
9
Xiao, Ye, and Xiao Tang Ding. "Analysis and Research on Dynamic Characteristics of Bulb Tubular Pumping Station Structure." Advanced Materials Research 594-597 (November 2012): 1917–21. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.1917.
Abstract:
This paper was combined with the third Huaian pumping station to study the dynamic characteristics of the bulb tubular pumping station. By using dynamic finite element analysis method to create Huaian pumping station modes. Then using ANSYS Model Analysis and harmonic response analysis, the vibration modes and dynamic response were researched deeply. According to the mode analysis results, the fundamental frequencies of upper pump house were determined for 1.36Hz and the fundamental frequencies of substructure were determined for 20.11Hz. The dynamic response of the bulb tubular pumping station structure under fluctuating pressures is calculated by ANSYS harmonic response analysis, and the results show that dynamic displacement satisfied the maximum allowable of architectural construction permission，so it can satisfy design requirement, which provides references value for other tubular pumping station in anti-vibration design.
10
Korobko, Bogdan, Serhii Zhyhylii, and Anton Kivshyk. "Mathematical simulation of the motion law of differential mortar pump piston intended for construction mix." ACADEMIC JOURNAL Series: Industrial Machine Building, Civil Engineering 1, no. 52 (July 5, 2019): 13–20. http://dx.doi.org/10.26906/znp.2019.52.1665.
Abstract:
The paper is dedicated to the creation of a differential mortar pump with electromagnetic action for pumping finishingmaterial, which is not sensitive to electric energy gaps, and which is at the same time convenient, easy to use, reliable andeconomical in operation. The paper presents the mathematical model of the working process dynamics of a differentialmortar pump with electromagnetic action, which will allow to study common patterns of pumping processes in the pump inthe whole, to solve general problems on their calculation and design, to set and solve problems of reliability control,connected with high-frequency pressure oscillations, the problems of structural optimization and optimal design of all itselements. The control system of a pumping unit with vector controlled asynchronous electric drive is proposed on the basis ofthe concept of inverse dynamics problems in combination with the minimization of local functionality of instantaneousenergy magnitudes, which ensures high-quality pressure regulation under the conditions of parametric perturbations activityand has acceptable energy indices.
Dissertations / Theses on the topic "Pumping machniery Design and construction":
1
White, Susan Jennifer. "Bubble pump design and performance." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/16914.
2
Liu, Guang. "A photovoltaic-powered pumping system." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/30592.
Abstract:
This thesis studies the optimal design for a photovoltaic-powered medium-head (30 meters) water pumping system, with the emphasis on improving the efficiency and reducing the maintenance requirements of the electrical subsystem. The reduction of maintenance requirements is realized by replacing the conventional brush-type permanent magnet dc motor with a brushless dc (BLDC) motor. Different BLDC motor control techniques such as position-sensorless operation, sinusoidal and trapezoidal excitations are investigated. The improvement in efficiency is achieved by maximizing the output power from the photovoltaic array and by minimizing the losses in various parts of the electrical sub-system. A microprocessor-based double-loop maximum power tracking scheme is developed for maximization of the photovoltaic array output power. Over 99% utilization factor is achieved for a typical clear day regardless of the season of the year. The system losses are minimized mainly by performing loss analysis and selecting most suitable switching topologies and switching components. Experimental results show that the combined converter-motor efficiency is comparable to those of high-efficiency brush-type dc motor systems.Applied Science, Faculty of
Electrical and Computer Engineering, Department of
Graduate
3
Mainland, Marlene Elise. "Analytical and experimental investigation of an efficient viscous pump." Thesis, Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/15832.
4
Stenlund, Olle. "Design and Modelling of a Container for Optimal Flow Rate and Wastewater Purification." Thesis, Umeå universitet, Institutionen för fysik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-183669.
Abstract:
Industries are becoming more aware of how they use water in their production process. In many cases, they release wastewater back into the water supply untreated, which can cause adverse side effects to the ecosystem. A sustainable environment requires efficient water purification. One approach to purify wastewater uses rotating bed reactors. An impeller filled with catalyst pellets that absorb the pollutants spins in the contaminated fluid. The inertial forces from the spinning impeller propel the contaminated water through the packed bed and purify it. In this study, we used one of these rotating bed reactors. However, the motors that drive these impellers can be bulky and may not be compatible with some tanks or environments. To solve this problem, we designed, constructed, and tested a container around the impeller that provides maximal outflow, using only the impellers pumping capability. We also developed a CFD simulation of the container to analyze the internal flows and forces. Because the flow generated by the rotating impeller displaces the fluid in a radial direction, the design works as a custom-made centrifugal pump. We constructed the container using plastic and wood with an outlet nozzle made of metal. The container's pump capability was around 2.5 liters per second when the impeller spun at 300 RPM. The developed CFD simulations gave a higher flow rate at 3.1 liters/second but overall helped shed light on the internal forces happening inside the container during high RPM testing. The design could generate a sufficient outflow of fluids, converting kinetic fluid energy to fluid pressure energy at the outlet, causing a pump effect. Overall, the design proved sturdy and could handle the forces occurring inside the container. The implementation of this design could allow industries to more efficiently and ergonomically utilize the purifying capabilities of the RBR in otherwise complex scenarios. By purifying wastewater before releasing it back into the water supply, we can take immediate action in achieving a sustainable environment.
5
Guner, Berkay. "Design And Construction Of An Educational Pump Bench With Operational Controls." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12605754/index.pdf.
Abstract:
System characteristics of automated pumping systems may change due to wear,
aging of piping, and accumulation of deposits in the system and/or due to
configuration changes. Such changes might result in conflicts between the controlling
algorithms and the actual system requirements for each particular case. The said
mismatch between the actual physical system and the software controlling it, may
result in inefficient operation of the pump which may even lead to total system
failures (overpressurization of instrumentation and sensing elements etc.) due to
temporary malfunctioning of the system components or permanent damages incurred
by them during operating under unsuitable conditions.
It is intended in this study to design and construct an experimental automated pump
bench with operational components (mechanical, electronical and instrumentation
etc.), serving in a system introducing multiple geometric heads and its controlling and
monitoring software in order to visualize effects of the above-mentioned cases for
education and training purposes.
System characteristics data acquisition module (system test module) provides the
means of recognizing new pump and system characteristics, provided that they were
changed due to some reason (throttled valve, changed pump speed, changed
flowrate or elevation of discharge etc.). Then the pump operation module enables
users to make comparative judgments by observing the effects of the abovementioned
changes.
Above-mentioned testing sequence and monitoring of changing physical quantities
were achieved by employing four pressure transducers, a custom made DC motor
operated -throttling valve with position feedback which was designed and constructed
specifically for this study and a variable frequency drive (VFD) which were all
connected to a custom made Main Control Circuit (MCC) Board.
6
Gross, Jonah M. "Development of acoustic transducers for use in the parametric pumping of spin waves." Thesis, 2013. http://hdl.handle.net/1957/37905.
Abstract:
The work detailed here is the development of simulations and fabrication techniques used for the construction of thin-film acoustic transducers for use in the parametric pumping of spin waves. The Mason Model, a 1-D equivalent circuit simulating the responses of multilayer acoustic transducers, is implemented using ABCD-parameters in MATLAB to determine the expected response from fabricated devices. The simulation is tested by varying device parameters and comparing the changes in device resonance response to those of prior published results. Three-layer thin-film acoustic transducers were also fabricated. These transducers use zinc oxide (ZnO) as a piezoelectric layer with aluminum (Al) electrodes. Construction is accomplished using the common thin-film fabrication techniques of sputtering, thermal evaporation, etching, and lift-off patterning processes. The response of the fabricated transducers is compared to that of the simulated response by observing the transducer's resonance frequency and characteristics. These results are used to validate the simulation and the transducer fabrication process. Finally, their usefulness for the design and fabrication of an acoustic spin wave amplification system is considered.Graduation date: 2013
Books on the topic "Pumping machniery Design and construction":
1
Turton, R. K. Rotodynamic pump design. Cambridge [England]: Cambridge University Press, 1994.
2
Chen, Wei. Ji beng xuan yong: Jibeng xuanyong. 8th ed. Beijing Shi: Hua xue gong ye chu ban she, 2009.
3
Elkey, William. Concrete pumping effects on entrained air-voids. [Olympia, Wash.]: Washington State Dept. of Transportation, 1994.
4
Commission, European. Study on improving the energy efficiency of pumps. Brussels, Belgium: European Commission, 2003.
5
Palau. Office of the President. Koror wastewater system improvements: Republic of Palau application for Japanese government grant aid assistance. Republic of Palau: Office of the President, 2001.
6
John, Davidson. Process pumps selection: A systems approach. 2nd ed. London: Professional Engineering Pub., 2000.
7
L, Sanks Robert, ed. Pumping station design. Boston: Butterworths, 1989.
8
M, Jones Garr, ed. Pumping station design. 3rd ed. Amsterdam: Butterworth-Heinemann, 2006.
9
Pumping station design. 2nd ed. Boston: Butterworth-Heinemann, 1998.
10
M, Jones Garr, Bosserman Bayard E, Sanks Robert L, and Tchobanoglous George, eds. Pumping station design. 3rd ed. Amsterdam: Elsevier/Academic Press, 2008.
Book chapters on the topic "Pumping machniery Design and construction":
1
Preene, M., and T. O. L. Roberts. "6. The application of pumping tests to the design of construction dewatering systems." In Groundwater problems in urban areas, 121–33. Thomas Telford Publishing, 1994. http://dx.doi.org/10.1680/gpiua.19744.0010.
2
"Design and Performance of Adsorptive Heat Pumps." In Technology Development for Adsorptive Heat Energy Converters, 223–50. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-4432-7.ch007.
Abstract:
The chapter is devoted to design and performance of adsorptive heat pumps. In the first sub-division, state-of-the-art of the adsorptive heat pumping is analyzed. It involves analysing operating principle of adsorptive heat pumps, comparing of the properties of adsorbents used, bed specifications, and operating conditions. Original construction of the adsorptive heat pump is designed by authors for independent heat supply systems or hot water supply of buildings and other structures for various purposes. The composites ‘silica gel – sodium sulphate' or ‘silica gel – sodium acetate' were used as adsorbents. Discharging was performed in a daytime, when heat pump supplied heating system with water warmed to 45 – 35°C. The regeneration mode proceeded at night from 0.00 to 8.00 a.m. Efficiency of suggested adsorptive heat pump is estimated by two methods: as ratio of adsorption heat to sum of desorption heat and external heat supplied to sorbent during its heating up to regeneration temperature (coefficient of performance of cycle) and as ratio of heat of adsorption to heat supplied by solar collector (net coefficient of performance). Suggested heat pump coefficients of energy performance of cycle are stated to be 2.084 when composite ‘silica gel – sodium sulphate' used and 2.021 when ‘silica gel – sodium acetate' used. Seasonal dependence of net coefficient energy performance for suggested adsorptive heat pump based on composites ‘silica gel – sodium sulphate' and ‘silica gel – sodium acetate' is revealed. Correlation of coefficients of energy performance of adsorptive heat pump and composite sorbents properties (sorption capacity and regeneration temperature) is stated. Insignificant decreasing of coefficients of energy performance when ‘silica gel – sodium acetate' used is explained by lower sorptive capacity as compared to ‘silica gel – sodium sulphate'. Suggested heat pump application perspectives are shown for heat supply systems to result from traditional energy sources independence and environmental advantages. Adsorptive heat pumps development challenges, major limitations for commercialization of adsorptive heat pumping, and requirements to ongoing innovations are analysed. The present chapter can be useful for energy efficient decentralized heat supply systems based on adsorptive heat pump unit.
Conference papers on the topic "Pumping machniery Design and construction":
1
Raade, Justin W., Timothy G. McGee, and H. Kazerooni. "Design, Construction, and Experimental Evaluation of a Monopropellant Powered Free Piston Hydraulic Pump." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42606.
Abstract:
A monopropellant powered free piston hydraulic pump (FPHP) was designed as a human scale (1.0 to 3.0 kW) mobile robotics power supply. The FPHP utilized high concentration hydrogen peroxide, which decomposes into hot gas when exposed to a catalyst, as the monopropellant energy source. Energy was extracted from the hydrogen peroxide and transferred directly to hydraulic fluid by expanding the hot decomposition gas in an integrated piston/cylinder arrangement. The prototype FPHP successfully produced 50 W of hydraulic power by pumping hydraulic fluid at an average pressure of 6.5 MPa (940 psi) and flow rate of 0.48 liters/min (0.13 gallons/min).
2
Nsofor, Emmanuel C., Phani R. Gurijala, and Zhan Jiang. "Design, Construction and Heat Transfer Analysis of a Thermoacoustic Refrigeration System." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33338.
Abstract:
The thermoacoustic processes resulting from pressure and temperature oscillations and their interactions with boundaries are utilized in thermoacoustic refrigeration systems. This technology offers benefits that include absence of significant moving parts (implying reduced maintenance), use of environmentally safe working fluids, quiet operation, and continuous capacity control. The flow of the thermoacoustically oscillating gas and heat transport in the stack were studied. Results indicate that there is a critical value of ΔT outside of which the work and heat transfer will increase for a given drive ratio. The system was designed and constructed. In order to achieve high thermal conductivity across the thickness of the stack and low thermal conductivity axially, a thermoplastic material with holes filled with carbon fiber was used for the stack. The fiber is in the direction perpendicular to the thickness of the plate thus increasing the heat transfer in this direction. Since thermoplastics have very low thermal conductivity, the dissipative heat transfer through the stack material by conduction from the hot heat exchanger to the cold one (the direction opposite to the heat pumping) is minimized. When thermoplastic materials are used for the stack in place of stainless steel there is a significant drop in Qlosses for the range of values studied.
3
Zhu, Honggeng, Longyang Dai, Rentian Zhang, Guoxian Zhu, Linbi Yao, and Jianqin Luo. "Numerical Simulation of the Internal Flow of a New-Type Shaft Tubular Pumping System." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-06064.
Abstract:
The structural features of a pumping system will directly affect the investment of the pumping station and its pumping efficiency. In the design and construction of low head or extra-low head pumping stations, bulb tubular pumping system and shaft tubular pumping system are widely adopted. So far all the 5 large tubular pumping stations finished or under construction took the form of rear type bulb tubular pumping system (bulb is arranged inside the discharge passage) in China’s Eastern Route Project of South-to-North Water Diversion. However, front type shaft tubular pumping systems (shaft is arranged inside the suction box) are more widely used in city flood-control pumping stations, which are characteristic of large amounts and medium or small scale. To improve the reliability of city flood-control pumping stations, the authors have invented a new-type shaft tubular pumping system featuring shaft suction box, siphon-type discharge passage with vacuum breaker valve as the cutoff device, which is possessed of such advantages as simpler structure, reliable cutoff and better energy performance. Taking an real pumping station in Yancheng city of China as an example, the computational fluid dynamics method was adopted in this paper to simulate the three dimensional turbulent flow of a model new-type tubular pumping system (impeller diameter D = 0.3m, rotational speed n = 1100r/min and specific speed ns is about 1500) and predict its performance, to improve the pumping system efficiency through hydraulic design optimization. Computation results show that the efficiency of the new-type shaft tubular pumping system reached 56.0% when the design head and discharge are 1.15m and 0.326m3/s respectively, and up to 68.8% when the maximum head and relevant discharge are 1.95m and 0.296m3/s respectively, having more extensive foreground for low-head, especially extra-low-head city flood-control pumping stations.
4
Vuorinen, Asko. "Conceptual Design of a 4 × 300 MW Modular Nuclear Plant." In ASME 2011 Small Modular Reactors Symposium. ASMEDC, 2011. http://dx.doi.org/10.1115/smr2011-6529.
Abstract:
The Finnish companies have built four medium size nuclear power plants. In addition they have constructed two nuclear icebreakers and several floating power plants. The latest 1650 MWe nuclear power plant under construction Olkiluoto-3 has had many problems, which have raised the costs of the plant to €3500/kWe from its original estimate of €2000/kWe and constriction schedule from four to eight years. It is possible to keep the costs down and schedule short by making the plant in shipyard and transport it to site by sea. The plant could be then lifted to its place by pumping seawater into the channel. This kind of concept was developed by the author in 1991, when he was making his thesis of modular gas fired power plants in Helsinki University of Technology. The modular construction of nuclear plants has made in a form of two nuclear icebreakers, which Wa¨rtsila¨ Marine has built in Helsinki Shipyard. The latest modular nuclear plant was launched in 2010 in St Petersburg shipyard. One of the benefits of modular construction is a possibility to locate the plant under rock by making the transportation channels in tunnels. This will give the plant external protection for aircraft crash and make the outer containment unnecessary. The water channels could also be used as pressure suppression pools in case of venting steam from the containment. This could reduce the radioactive releases in case of possible reactor accidents. The two 440 MW VVER plants build in Finland had construction costs of €1600 /kWe at 2011 money. The author believes that a 1200 MW nuclear plant with four 300 MW units can be constructed in five years and with €3300/kW costs, where the first plant could be generating power within 40 months and next units with 6 month intervals.
5
Ackl, Raja Abou, Andreas Swienty, Flemming Lykholt-Ustrup, and Paul Uwe Thamsen. "Avoiding Sedimentation and Air Entrainment in Pump Sump for Wet Pit Pumping Stations." In ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-33761.
Abstract:
In many places lifting systems represent central components of wastewater systems. Pumping stations with a circular wet-pit design are characterized by their relatively small footprint for a given sump volume as well as their relatively simple construction technique [1]. This kind of pumping stations is equipped with submersible pumps. These are located in this case directly in the wastewater collection pit. The waste water passes through the pump station untreated and loaded with all kind of solids. Thus, the role of the pump sump is to provide an optimal operating environment for the pumps in addition to the transportation of sewage solids. Understanding the effects of design criteria on pumping station performance is important to fulfil the wastewater transportation as maintenance-free and energy efficient as possible. The design of the pit may affect the overall performance of the station in terms of poor flow conditions inside the pit, non-uniform und disturbed inflow at the pump inlet, as well as air entrainment to the pump. The scope of this paper is to evaluate the impact of various design criteria and the operating conditions on the performance of pump stations concerning the air entrainment to the pump as well as the sedimentation inside the pit. This is done to provide documentation and recommendations of the design and operating of the station. The investigated criteria are: the inflow direction, and the operating submergence. In this context experiments were conducted on a physical model of duplex circular wet pit wastewater pumping station. Furthermore the same experiments were reproduced by numerical simulations. The physical model made of acrylic allowed to visualize the flow patterns inside the sump at various operating conditions. This model is equipped with five different inflow directions, two of them are tangential to the pit and the remaining three are radial in various positions relative to the pumps centerline. Particles were used to enable the investigation of the flow patterns inside the pit to determine the zones of high sedimentation risk. The air entrainment was evaluated on the model test rig by measuring the depth, the width and the length of the aerated region caused by the plunging water jet and by observing the air bubbles entering the pumps. The starting sump geometry called baseline geometry is simply a flat floor. The tests were done at all the possible combinations of inflow directions, submergence, working pump and operating flow. The ability of the numerical simulation to give a reliable prediction of air entrainment was assessed to be used in the future as a tool in scale series to define the scale effect as well as to analyze the flow conditions inside the sump and to understand the air entrainment phenomenon. These simulations were conducted using the geometries of the test setup after generating the mesh with tetrahedral elements. The VOF multiphase model was applied to simulate the interaction of the liquid water phase and the gaseous air phase. On the basis of the results constructive suggestions are derived for the design of the pit, as well as the operating conditions of the pumping station. At the end recommendations for the design and operating conditions are provided.
6
Hight, Tim, Jorge Gonzalez, and Ismael Sa´nchez. "International Community Based Senior Design Projects: Santa Clara University and Universidad Centro Americana." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81116.
Abstract:
As part of an initiative to promote community based engineering education, Santa Clara University engineering students undertook two ambitious senior design projects during the 2004-2005 school year that have direct impact on communities in El Salvador. The two projects were coordinated through our sister school, Universidad Centro Americana, in San Salvador, and also involved other local and international partners. The first project consisted of the design, purchase, and installation of a 3 kW solar powered water pumping system for Isla Zacatillo off the southwest coast of El Salvador. The new system replaces a standard electrical system that was dependent on an expensive undersea power connection to the mainland. The new system promises higher reliability and independence while also promoting sustainable energy and water solutions. The second project involved the design and construction of a prototype Human Powered Utility Vehicle (HPUV) for use in rural transportation of goods and people. The team faced a number of challenges in order to improve upon existing designs. The primary goals were to create a design that was robust, reliable, highly functional, and inexpensive. The paper will discuss the planning and logistics involved in accomplishing these international senior design projects, the challenging communication issues, the benefits to students and faculty beyond those of a conventional engineering design project, the impacts on the local society, and the final results of the projects.
7
Nashine, B. K., S. K. Dash, K. Gurumurthy, M. Rajan, and G. Vaidyanathan. "Design and Testing of D.C. Conduction Pump for Sodium Cooled Fast Reactor." In 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89123.
Abstract:
DC Conduction pump immersed in sodium forms a part of Failed Fuel Location Module (FFLM) of 500 MWe Fast Breeder Reactor (PFBR) currently under construction. FFLM housed in control plug of the reactor, is used to locate the failed fuel sub-assembly due to clad rupture in the fuel pin. The DC conduction pump sucks the sodium from the top of fuel sub-assemblies through the selector valve and pumps the sodium to hold up for detecting the presence of delayed neutrons. Presence of delayed neutron is the indication of failure in the sampled fuel sub-assembly. The DC Conduction Pump was chosen because of its low voltage operation (2 V) where argon/alumina ceramic can provide required electrical insulation even at operating temperature of 560°C without much complication on the manufacturing front. Sampling of sodium from top of different sub-assemblies is achieved by operation of selector valve in-conjunction with the drive motor. FFLM requires the pump to be immersed in sodium pool at ∼560°C located above the fuel sub-assemblies in the reactor. The Pump of 0.36 m3/h capacity and developing 1.45 Kg/ cm2 pressure was designed, manufactured and tested. The DC Conduction Pump has a stainless steel duct filled with liquid sodium, which is to be pumped. The stainless steel duct is kept in magnetic field obtained by means of electromagnet. The electromagnet is made of soft iron and the coil made of copper conductor surrounds the yoke portion of electromagnet. The external DC source of 2000 Amps, 2 Volt is used to send current through sodium placed in the stainless steel duct and the same current is sent through copper coil of electromagnet for producing required magneto motive force, which in turn produces required magnetic field. The interaction of current in sodium (placed in stainless steel duct) and magnetic field produced by the electromagnet in the duct region produces pumping force in the sodium. Electromagnet, copper coil, stainless steel duct, copper bus bar etc. are encapsulated in stainless steel shell. Hydraulic characteristics, efficiency, cavitation free operation at operating temperatures was ascertained by conducting tests in sodium loop called Large Component Test Rig (LCTR). The pump was also endurance tested for 750 hrs. The performance tests on DC Conduction Pump indicate that the pump meets the target specification at reactor operating condition. This paper deals with design, construction and performance testing of DC Conduction Pump.
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Moore, J. Jeffrey, Hector Delgado, and Timothy Allison. "Qualification Testing of a Liquid CO2 Turbopump for Carbon Capture and Sequestration Applications." In ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/gt2011-45912.
Abstract:
In order to reduce the amount of carbon dioxide (CO2) greenhouse gases released into the atmosphere, significant progress has been made in developing technology to sequester CO2 from power plants and other major producers of greenhouse gas emissions. The compression of the captured carbon dioxide stream requires a sizeable amount of power, which impacts plant availability, capital expenditures and operational cost. Preliminary analysis has estimated that the CO2 compression process reduces the plant efficiency by 8% to 12% for a typical power plant. The goal of the present research is to reduce this penalty through development of novel compression and pumping processes. The research supports the U.S. Department of Energy (DOE) National Energy Technology Laboratory (NETL) objectives of reducing the energy requirements for carbon capture and sequestration in electrical power production. The primary objective of this study is to boost the pressure of CO2 to pipeline pressures with the minimal amount of energy required. Previous thermodynamic analysis identified optimum processes for pressure rise in both liquid and gaseous states. At elevated pressures, CO2 assumes a liquid state at moderate temperatures. This liquefaction can be achieved through commercially available refrigeration schemes. However, liquid CO2 turbopumps of the size and pressure needed for a typical power plant were not available. This paper describes the design, construction, and qualification testing of a 150 bar cryogenic turbopump. Unique characteristics of liquid CO2 will be discussed.
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Pecush, Adam, Mark McTavish, and Brian Ellestad. "Inspection and Prioritization Methods for Small Diameter Auxiliary Piping." In 2014 10th International Pipeline Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/ipc2014-33593.
Abstract:
To serve the pumping and storage needs of its customers; Enbridge operates more than 25 terminals and 150 pump stations across North America. In each of these facilities, small diameter (NPS 6 and smaller) piping is used in auxiliary systems including instrumentation, measurement, and product re-injection. Traditionally, in the design of facilities, this small piping has received less attention than large diameter process lines and, during construction, has typically been field run based on standard installation details. This, in conjunction with 65 years of changing design and construction philosophies, as well as asset acquisitions, has resulted in a wide variety of installation configurations across the Enbridge liquids system. The Small Diameter Piping Program in the Facilities Integrity group centrally manages the integrity of all small diameter auxiliary piping across the Enbridge liquids system. Historically, the management and remediation of small diameter systems has been based on addressing specific installation types identified through incident investigations. While generally effective at minimizing re-occurrence, this approach has been limited in its ability to proactively identify installations that should be addressed. In support of our goal of zero incidents, Enbridge has developed a proactive methodology for the inspection and prioritization of small diameter auxiliary piping. Installation types are evaluated on their susceptibility to specific damage mechanisms. An inspection and prioritization model was developed through the combination of internal lessons learned and prioritization methodologies outlined in industry publications, specifically those from the overseas oil and gas industry. This model, sets a standardized process to assign a likelihood of failure (LOF) score to individual small diameter installations of specific types and/or functions. Presently, likelihood of failure scores are used to identify installations requiring remediation, and to most effectively prioritize system-wide remediation activities. Over time, these scores will also be used to demonstrate an overall reduction in the likelihood of failure for small diameter piping in the Enbridge liquids pipeline system.
10
Steinke, Mark E., and Vinod Kamath. "Experimental Investigation of a Cost Effective Skived Microchannel Cold Plate for Mass Production." In ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/icnmm2015-48460.
Abstract:
A liquid cold plate that utilizes skived microchannels has been developed to gain the benefits of direct liquid cooling, but minimize the expensive cost of such cold plates. The construction, application, and experimental results of the skived cold plate will be presented. Skiving is a mechanical process that cuts thin layers of material. It is an established process for making air cooled heat sinks. In this application, the fin field is skived and placed inside a housing that allows for liquid flow through the resulting fins. The design boundary conditions and parameters will be described and performance per cost metric will be presented and used to evaluate future optimization possibilities. The objective of the present work was to minimize the thermal resistance while maintaining a low manufacturing cost. The design goal was to produce a cold plate that had sufficient thermal performance and the ability to be mass produced at a reasonable cost. The resulting cold plate would also need to support warm water cooling of microprocessors. Warm water is a working fluid that has not been chilled below ambient temperatures. Therefore, the water temperature could be up to 45 degrees Celsius. The cold plate had a thermal resistance less than 0.3 °Ccm2/W. The pressure drop was minimized to lower the required pumping power and was less than 6 kPa at 1.0 liter per minute. Using a skiving process, it is possible to develop a cold plate that delivers good thermal performance and maintains a low production cost.
Reports on the topic "Pumping machniery Design and construction":
1
Qamhia, Issam, and Erol Tutumluer. Evaluation of Geosynthetics Use in Pavement Foundation Layers and Their Effects on Design Methods. Illinois Center for Transportation, August 2021. http://dx.doi.org/10.36501/0197-9191/21-025.
Abstract:
This report presents findings of a research effort aimed at reviewing and updating existing Illinois Department of Transportation (IDOT) specifications and manuals regarding the use of geosynthetic materials in pavements. The project consisted of three tasks: evaluate current IDOT practice related to the use of geosynthetics; review research and state of the practice on geosynthetics applications, available products, design methods, and specifications; and propose recommendations for geosynthetic solutions in pavements to modernize IDOT’s practices and manuals. The review of IDOT specifications revealed that geotextiles are the most used geosynthetic product in Illinois, followed by geogrids. Several of IDOT’s manuals have comprehensive guidelines to properly design and construct pavements with geosynthetics, but several knowledge gaps and potential areas for modernization and adoption of new specifications still exist. Based on the review of the available design methods and the most relevant geosynthetic properties and characterization methods linked to field performance, several updates to IDOT’s practice were proposed. Areas of improvement are listed as follows. First, establish proper mechanisms for using geogrids, geocells, and geotextiles in subgrade restraint and base stabilization applications. This includes using shear wave transducers, i.e., bender elements, to quantify local stiffness enhancements and adopting the Giroud and Han design method for subgrade restraint applications. Second, update IDOT’s Subgrade Stability Manual to include property requirements for geogrids, geotextiles, and geocells suitable for subgrade restraint applications. Third, establish proper standards on stabilization, separation, and pumping resistance for geotextiles by incorporating recent research findings on geotextile clogging and permeability criteria. Fourth, promote the use of modern geosynthetic products, such as geotextiles with enhanced lateral drainage, and fifth, elaborate on proper methods for construction/quality control measures for pavements with geosynthetics.