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Dissertations / Theses on the topic 'Heat exchanger applications'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Keltner, Noelle Joy. "Study of PocoFoam (TM) as a heat exchanger element in cryogenic applications." Thesis, Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51774.

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Superconductors present great potential for weight reduction and increased power delivery when compared to traditional copper power delivery systems, but current systems require cryogenic cooling systems. Traditional superconductor cooling systems consist of helium cooled by helical heat exchangers made of Oxygen Free High thermal Conductivity (OFHC) copper tube. The helium is cooled by bulky heat exchangers consisting of OFHC copper coils wrapped around a cryogenic cooler heat sink for heat transfer into the working fluid. Metal foams have recently been studied in a variety of heat transfer a

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2

Sharkey, Patrick S. "Optimisation of charge-air coolers for vehicular applications using numerical techniques." Thesis, University of Brighton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309180.

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3

Chong, Alexander Chi-To. "A study of scraped-surface heat exchanger in ice-making applications." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ62912.pdf.

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4

González, Morales César Augusto. "CHARACTERIZATION OF HEAT TRANSFER AND EVAPORATIVE COOLING OF HEAT EXCHANGERS FOR SORPTION BASED SOLAR COOLING APPLICATIONS." Thesis, KTH, Kraft- och värmeteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-129165.

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The content of this Master thesis is the characterization of three different cross unmixed flow heat exchangers. All of the heat exchangers have different inner geometries and dimensions. In order to perform the characterization of these heat exchangers, measurements of heat transfer were done under different conditions: five different temperatures at the inlet of the sorption side, different mass flow for both inlet sides of the heat exchangers.The heat transfer measurements were done with and without applying indirect evaporative cooling in order to find out the influence of indirect evapora

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5

Rees, M. "The suitability of ferritic oxide dispersion strengthened tubular components for heat exchanger applications." Thesis, Swansea University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638640.

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The investigation focused upon determining the circumferential creep rupture strength of two ferritic Oxide Dispersion Strengthened tubular materials, namely MA956 and ODM 751, and classifying the degree of anisotropy displayed by MA956 at 1100<SUP>o</SUP>C. The most critical part of such an assessment was that tubular components be tested under internal pressures, as the hoop strength of the tube is design limiting. Testing of this nature necessitated that the tubular specimens be made pressure retaining, hence the initial experimental work focused upon successfully diffusionally bonding tubu

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6

Lawson, Michael James. "Practical Applications of Delta Winglets in Compact Heat Exchangers with Louvered Fins." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/34141.

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<p>Compact heat exchangers are widely used by the automotive industry in systems that cool engine components. Louvered fin heat exchangers are used over their continuous fin counterparts because of the significant advantages they provide in heat transfer efficiency, while only causing small increases in overall pressure losses. With the recent emphasis that has been placed on reducing fuel consumption, decreasing the size of the compact heat exchanger has become an important concern. With reduction in size comes not only weight savings, but also a decrease in frontal area in a vehicle that

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7

Pohl, Sebastian [Verfasser]. "Surface Characterization and Interaction Modeling of Biofouling in Polymer Film Heat Exchanger Applications / Sebastian Pohl." München : Verlag Dr. Hut, 2018. http://d-nb.info/1170473261/34.

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8

Guccione, Salvatore. "Design and Optimization of a Sodium-Molten Salt Heat Exchanger for Concentrating Solar Power applications." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279783.

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Concentrating Solar Power (CSP) is one of the most promising renewable energybased electricity generation technologies to deal with the increasing demand of power consumption and environmental sustainability. With the aim of achieving the 2020 SunShot cost target for CSP of 60 USD/MWh, the United States Department of Energy presented, in May 2018, the Gen3 CSP initiative. In particular, the CSP Gen3 Liquid-Phase Pathway proposes to design a CSP system adopting liquid sodium as Heat Transfer Fluid (HTF) in the receiver, advanced high-temperature molten chloride salt as storage fluid and supercr

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9

Truster, Nicholas Leigh. "A REDUCED-ORDER COMPUTATIONAL MODEL OF A TWO-PASS, CROSS-FLOW CONFORMAL HEAT EXCHANGER FOR AEROSPACE APPLICATIONS." Miami University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=miami1480535587051259.

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10

Carlsson, Carin. "Modeling and Experimental Validation of a Rankine Cycle Based Exhaust WHR System for Heavy Duty Applications." Thesis, Linköpings universitet, Fordonssystem, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-81737.

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To increase the efficiency of the engine is one of the biggest challenges for heavy vehicles. One possible method is the Rankine based Waste Heat Recovery. Crucial for Rankine based Waste Heat Recovery is to model the temperature and the state of the working fluid. If the state of the working fluid is not determined, not only the efficiency of the system could be decreased, the components of thesystem might be damaged.A Simulink model based on the physical components in a system developed by Scania is proposed. The model for the complete system is validated against a reference model developed

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11

Bahaidarah, Haitham M. S. "A numerical study of heat and momentum transfer over a bank of flat tubes." Texas A&M University, 2004. http://hdl.handle.net/1969.1/2782.

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The present study considers steady laminar two-dimensional incompressible flow over both in-line and staggered flat tube bundles used in heat exchanger applications. The effects of various independent parameters, such as Reynolds number (Re), Prandtl number (Pr), length ratio (L/Da), and height ratio (H/Da), on the pressure drop and heat transfer were studied. A finite volume based FORTRAN code was developed to solve the governing equations. The scalar and velocity variables were stored at staggered grid locations. Scalar variables (pressure and temperature) and all thermophysical properties

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12

Hjälm, Wallborg Martin, and Joakim Palmgren. "Improving engine oil coolerperformance : For future vehicle applications." Thesis, Uppsala universitet, Mikrosystemteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-256510.

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This thesis describes the process of improving the engine oil cooler performance for future vehicle applications, from ideas to simulated concepts. Increasing market expectations of high engine power, low fuel consumption and high towing capabilities results in an ever rising pressure on the cooling system in modern cars. The desire to prevent a future situation where the engine oil could become too hot, formed the basis for this thesis. The thesis was performed during 10 weeks from March to June 2015, at Volvo Car Corporation in Gothenburg. The working process started with literary studies wh

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13

Bellander, Rickard. "Testing large samples of PCM in water calorimeter and PCM used in room applications by night-air cooling." Licentiate thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-495.

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14

Hugo, Jean-michel. "Transferts dans les milieux cellulaires à forte porosité : applications à l'optimisation structurale des échangeurs à ailettes." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4767/document.

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Cette de thèse comporte deux volets : Le premier, plutôt applicatif, concerne le design d'échangeurs à ailettes et à mousses ; le second, plus académique, traite des relations entre la texture des mousses métalliques et leurs propriétés thermophysiques effectives. Sur la première partie consacrée à l'amélioration des performances des échangeurs de chaleur Mota. Nous avons mis en place une méthode de dimensionnement multi-échelle adaptés aux batteries tubes-ailettes et aux échangeurs à mousse ; Nous avons développé et caractériser une architecture optimisée d'échangeur à mousse et à ailettes. D

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15

Hugonnot, Patrick. "Étude locale de l'écoulement et performances thermohydrauliques à faible nombre de Reynolds d'un canal plan corrugue : Applications aux échangeurs de chaleur à plaques." Nancy 1, 1989. http://www.theses.fr/1989NAN10308.

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Ce rapport concerne d'une part, l'étude locale de l'écoulement dans un canal plan corrugué, réalisée par des approches expérimentale et numérique, et, d'autre part, la détermination expérimentale des performances thermohydrauliques à faibles nombres de REYNOLDS de différents canaux d'échangeurs à plaques. Les visualisations expérimentales del'écoulement local ont autorisé la détermination des transitions de régime dans des géométries 2D et 3D. Concernant le canal 2D, une optimisation du profil de l'onde est proposée, basée sur la caractérisation thermohydraulique des phénomènes locaux mis en é

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16

Lintern, Andrew Charles. "Applications of two-phase flow and heat transfer in compact heat exchangers." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/10549.

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Three applications of two-phase flow and heat transfer in plate-fin heat exchangers have been studied. A dephlegmator is a heat exchanger in which reflux condensation of a vapour mixture occurs, and plate-fln versions have importance in cryogenic gas separation processes. Numerical calculations for different binary mixtures show that the number of transfer units can be expressed as a simple function of the inlet vapour state and flow rate, heat load, and channel geometry. The calculations also show that the vapour and liquid exit compositions tend to limiting values as the number of transfer u

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17

Cockburn, A. "Optimisation of metallic fibre arrays for heat exchange applications." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.597798.

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Networks of bonded metallic fibres represent an attractive candidate material for use in heat exchanger cores since they can offer a combination of high permeability, high specific surface area and high thermal conductivity. In addition, by varying fibre dimensions and processing conditions, the porosity and scale of fibrous materials can be varied over a wide range. This work concerns the determination of the optimal structure of fibrous material for use in heat exchange cores. The permeability and orientation dependent thermal conductivity of fibrous materials manufactured from copper and 44

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18

MacIver, Alasdair. "The application of enhanced surfaces to boiling over tube bundles." Thesis, Heriot-Watt University, 1993. http://hdl.handle.net/10399/1472.

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19

Payne, Russell. "The application of artificial neural networks to combustion and heat exchanger systems." Thesis, University of South Wales, 2005. https://pure.southwales.ac.uk/en/studentthesis/the-application-of-artificial-neural-networks-to-combustion-and-heat-exchanger-systems(684a7758-1b1c-4560-8df1-e482b42ef8a2).html.

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The operation of large industrial scale combustion systems, such as furnaces and boilers is increasingly dictated by emission legislation and requirements for improved efficiency. However, it can be exceedingly difficult and time consuming to gather the information required to improve original designs. Mathematical modelling techniques have led to the development of sophisticated furnace representations that are capable of representing combustion parameters. Whilst such data is ideal for design purposes, the current power of computing systems tends to generate simulation times that are too gre

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20

White, Peter. "On the application of artificial intelligence techniques to heat exchanger design." Thesis, University of Ulster, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.281354.

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21

Gari, Abdullatif Abdulhadi. "Analysis of conjugate heat transfer in tube-in-block heat exchangers for some engineering applications." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001716.

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22

Mavi, Anele. "Computational analysis of viscoelastic fluid dynamics with applications to heat exchangers." Master's thesis, Faculty of Science, 2019. http://hdl.handle.net/11427/30078.

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In this study, the computational analysis of a pressure driven viscoelastic fluid in a double pipe heat exchanger set-up is investigated. Non-Newtonian viscoelastic fluids in heat exchanger arrangements are encountered in various industrial applications such as power generation, refrigeration and in the food processing industry where the need for cooling and heating of liquids is required. The model problem is governed by complex, non-linear and coupled partial differential equations. These are solved using the semi-implicit finite difference method integrated with the Crank-Nicolson scheme. T

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23

Namasivayam, Sothy. "The application of machine intelligence to the design of heat exchangers." Thesis, University of Ulster, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359663.

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24

Lee, Jung Chul. "Fabrication, characterization, and application of multifunctional." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/22697.

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Thesis (Ph. D.)--Mechanical Engineering, Georgia Institute of Technology, 2007.<br>Committee Chair: King, William; Committee Member: Allen, Mark; Committee Member: Brand, Oliver; Committee Member: Glezer, Ari; Committee Member: Joshi, Yogendra.

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25

Canhoto, Paulo. "Optimization of Heat Transfer Systems and Use of the Environmental Exergy Potential - Application to Compact Heat Exchangers and Heat Pumps." Doctoral thesis, IIFA - Instituto de Investigação e Formação Avançada, Universidade de Évora, 2012. http://hdl.handle.net/10174/7775.

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In this thesis, the optimization of forced convection heat sinks and groundwater-source heat pumps is addressed with the purpose of improving energy efficiency. Parallel ducts heat sinks are considered under constrained (fixed) pressure drop, pumping power and heat transfer rate. The intersection-of-asymptotes method is employed together with numerical simulations and relationships for determining optimum hydraulic diameter are put forward. An optimal design emerges under fixed heat transfer rate, which matches that found through the joint minimization of pressure drop and pumping power. With

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26

Canhoto, Paulo Manuel Ferrão. "Optimization of heat transfer systems and use of the environmental energy potential: application to compact heat exchangers and heat pumps." Doctoral thesis, Universidade de Évora, 2012. http://hdl.handle.net/10174/14559.

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In this thesis, the optimization of forced convection heat sinks and groundwater- -source heat pumps is addressed with the purpose of improving energy efficiency. Parallel ducts heat sinks are considered under constrained (fixed) pressure drop, pumping power and heat transfer rate. The intersection-of-asymptotes method is employed together with numerical simulations and relationships for determining optimum hydraulic diameter are put forward. An optimal design emerges under fixed heat transfer rate, which matches that found through the joint minimization of pressure drop and pumping power. Wit

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27

Parida, Pritish Ranjan. "Optimization and Fabrication of Heat Exchangers for High-Density Power Control Unit Applications." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/77165.

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The demand for more power and performance from electronic equipment has constantly been growing resulting in an increased amount of heat dissipation from these devices. Thermal management of high-density power control units for hybrid electric vehicles is one such application. Over the last few years, the performance of this power control unit has been improved and size has been reduced to attain higher efficiency and performance causing the heat dissipation as well as heat density to increase significantly. However, the overall cooling system has remained unchanged and only the heat exchanger

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28

Leruth, Alexandre. "Heat exchanger network self-optimising control : Application to the crude unit at Mongstad refinery." Thesis, Norges Teknisk-Naturvitenskaplige Universitet, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-21108.

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This work applies the concept of self-optimising control for the operation of the given network. The steady-state performances of the self-optimising variables derived by Jäschke (Jäschke, 2012) are assessed and two main control configurations are examined: a simple decentralised control configuration (PIDs Control) and an advanced multivariable control configuration (Model Predictive Control). The steady-state performances appears to be moderate but need to be re-assessed using a proper steady-state model. The decentralised control configuration is found to present acceptable dynami

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29

Checketts, Gus Thomas. "Microchannel Radiator: an Investigation of Microchannel Technology with Applications in Automotive Radiator Heat Exchangers." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc700005/.

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Microchannels have been used in electronics cooling and in air conditioning applications as condensers. Little study has been made in the application of microchannels in automotive heat exchangers, particularly the radiator. The presented research captures the need for the design improvement of radiator heat exchangers in heavy-duty vehicles in order to reduce aerodynamic drag and improve fuel economy. A method for analyzing an existing radiator is set forth including the needed parameters for effective comparisons of alternative designs. An investigation of microchannels was presented and it

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30

Given, Joseph D. "Application of the Box-Jenkins technique for system identification of an airfin heat exchanger process." Thesis, University of Ottawa (Canada), 1987. http://hdl.handle.net/10393/5293.

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31

Barnes, Javier. "Application of Cyclic Polarization of Aluminum 3003 Used in All-Aluminum Microchannel Heat Exchangers." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc801930/.

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All-aluminum microchannel heat exchangers are designed to significantly reduce refrigerant charge requirements, weight, reduced brazed joints, and decreased potential for leakage by increasing reliability. Al 3003 alloy is corrosion resistant and can be formed, welded, and brazed but the issue with all-aluminum heat exchangers is localized corrosion (pitting) in corrosive environments. Currently, there is no universally accepted corrosion test that all coil manufacturers use to characterize their products. Electrochemical testing method of cyclic polarization was employed in this investigation

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32

Carman, Bradley Gene. "Design of a high effectiveness ceramic micro-channel heat recuperator for micro-turbine application." Honors in the Major Thesis, University of Central Florida, 2002. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/262.

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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information.<br>Bachelors<br>Engineering<br>Mechanical Engineering

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33

Tubman, Ian McCrea. "An analysis of water for water-side fouling potential inside smooth and augmented copper alloy condenser tubes in cooling tower water applications." Master's thesis, Mississippi State : Mississippi State University, 2003. http://library.msstate.edu/etd/show.asp?etd=etd-12122002-092733.

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34

Cheng, Tao 1975. "Nonlinear observer design using contraction theory with application to heat exchangers having varying phase transition." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36177.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2006.<br>Includes bibliographical references (leaves 90-91).<br>Thermo-fluid systems such as air conditioning and refrigeration systems are widely used in residential, commercial, and industrial applications. By the end of the 20th century, nearly 70 percent of U.S. households had air conditioning, and 99.5 percent had at least one refrigerator. Advanced control and monitoring of the thermo-fluid systems has become an inevitable but challenging issue in this century as the energy efficiency has becom

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35

Wang, Cheng. "Application of the thermoelectric heat exchange module combined with renewable energy for UK domestic heating." Thesis, University of Newcastle upon Tyne, 2017. http://hdl.handle.net/10443/3788.

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This thesis proposes a theoretical study which mainly utilizes experimental test, quantitative data statistics, case study and scenario simulation to ascertain the feasibility of developing a thermoelectric (TE) heating system powered by renewable energy to service for the UK domestic heating demands, and further compete with current domestic heating system to reduce the greenhouse gas emissions. Experimental study results of the space heating application of TE modules in a laboratory environment (19 ◦C-21 ◦C) and outside courtyard low-temperature environment (1 ◦C-5 ◦C) demonstrate that suffi

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Loubser, Karl Albie. "An experimental study of an inherently-safe, natural circulating, flash-tube type system for a nuclear reactor steam supply concept." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/96050.

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Thesis (MEng) -- Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: This project investigates aspects of a novel inherently safe nuclear power steam supply system as safety is of paramount importance. The system envisaged has unique features namely: a) a two-phase flow flash-tube type natural circulating primary loop (also the secondary radioactive particle containment); b) a twophase flow thermosyphon heat pipe type heat exchanger secondary loop is used to transfer heat from the primary loop to the steam generators, thereby physically separating the two flow streams from one another; c

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Pogiatzis, Thomas. "Application of mixed-integer programming in chemical engineering." Thesis, University of Cambridge, 2013. https://www.repository.cam.ac.uk/handle/1810/245023.

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Mixed-Integer Programming has been a vital tool for the chemical engineer in the recent decades and is employed extensively in process design and control. This dissertation presents some new Mixed-Integer Programming formulations developed for two well-studied problems, one with a central role in the area of Optimisation, the other of great interest to the chemical industry. These are the Travelling Salesman Problem and the problem of scheduling cleaning actions for heat exchanger networks subject to fouling. The Travelling Salesman Problem finds a plethora of applications in many scientific d

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Bougeard, Daniel. "Etude expérimentale du transfert thermique couplé au sein de géométries complexes : application aux échangeurs de chaleur." Valenciennes, 1997. https://ged.uphf.fr/nuxeo/site/esupversions/32ad393b-fdf6-43c3-803f-5411e53c570f.

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Ce travail consiste à analyser les échanges thermiques couplés au sein des échangeurs de chaleur à ailettes planes munies de promoteurs de turbulence. Une étude bibliographique permet de bien appréhender les phénomènes physiques responsables de l'augmentation du transfert convectif à l'aide de promoteurs de turbulence. Une méthodologie d'étude est ensuite proposée afin de déterminer les performances thermiques et aérauliques des échangeurs. Une méthode utilisant une efficacité de tube permet de déterminer la puissance thermique dissipée dans les échangeurs réels à partir d'essais effectués sur

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Peronski, Lukasz. "Application of computational fluid dynamics in the design of heat exchangers for domestic central heating boilers." Thesis, University of Leeds, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612612.

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The aim of this study is to investigate the possible use of commercial Computational Fluid Dynamics (CFD) software in the design process of a heat exchanger for a domestic gas boiler. Fluid flow and heat transfer CFD simulations have been performed and validated. In general, a good agreement between the CFD simulations and the experimental results was observed. The porous media approach was used for approximating the water flow resistance characteristics in the sections of the heat exchanger in the flow distribution problems. This was in cases in which the direct CFD simulations of the water f

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Ahlinder, Stefan. "On modelling of compact tube bundle heat exchangers as porous media for recuperated gas turbine engine applications." [S.l.] : [s.n.], 2006. http://se6.kobv.de:8000/btu/volltexte/2006/15.

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41

Gomaa, Abdalla Galal. "Thermo-fluid characteristics of fin-and-tube heat exchangers with various fin details for air conditioning applications." Thesis, Northumbria University, 2002. http://nrl.northumbria.ac.uk/3513/.

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The need for more efficient air conditioning systems requires an in depth understanding about the performance of its components. One of the key components in the air conditioning plant is the fin-and-tube cooling coil, which is investigated here. The main focus of the work is concerned with the analysis of fin-and-tube cooling coils having two classes of passive enhancement techniques known as corrugated and turbulated fins with particular reference of developing flow region. Initially, two-dimensional modelling was done to establish the scope of later three-dimensional modelling in terms of d

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42

Fettaka, Salim. "Application of Multiobjective Optimization in Chemical Engineering Design and Operation." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23209.

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The purpose of this research project is the design and optimization of complex chemical engineering problems, by employing evolutionary algorithms (EAs). EAs are optimization techniques which mimic the principles of genetics and natural selection. Given their population-based approach, EAs are well suited for solving multiobjective optimization problems (MOOPs) to determine Pareto-optimal solutions. The Pareto front refers to the set of non-dominated solutions which highlight trade-offs among the different objectives. A broad range of applications have been studied, all of which are drawn from

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43

Abdelaziz, Omar Abdelaziz Ahmed. "Development of multi-scale, multi-physics, analysis capability and its application to novel heat exchanger design and optimizaiton." College Park, Md.: University of Maryland, 2009. http://hdl.handle.net/1903/9566.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2009.<br>Thesis research directed by: Dept. of Mechanical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Mostaghim, Besarati Saeb. "Analysis of Advanced Supercritical Carbon Dioxide Power Cycles for Concentrated Solar Power Applications." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5431.

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Solar power tower technology can achieve higher temperatures than the most common commercial technology using parabolic troughs. In order to take advantage of higher temperatures, new power cycles are needed for generating power at higher efficiencies. Supercritical carbon dioxide (S-CO2) power cycle is one of the alternatives that have been proposed for the future concentrated solar power (CSP) plants due to its high efficiency. On the other hand, carbon dioxide can also be a replacement for current heat transfer fluids (HTFs), i.e. oil, molten salt, and steam. The main disadvantages of the c

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Yekoladio, Peni Junior. "Thermodynamic optimization of sustainable energy system : application to the optimal design of heat exchangers for geothermal power systems." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/31615.

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The present work addresses the thermodynamic optimization of small binary-cycle geothermal power plants. The optimization process and entropy generation minimization analysis were performed to minimize the overall exergy loss of the power plant, and the irreversibilities associated with heat transfer and fluid friction caused by the system components. The effect of the geothermal resource temperature to impact on the cycle power output was studied, and it was found that the maximum cycle power output increases exponentially with the geothermal resource temperature. In addition, an optimal turb

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Ahlinder, Stefan [Verfasser]. "On Modelling of Compact Tube Bundle Heat Exchangers as Porous Media for Recuperated Gas Turbine Engine Applications / Stefan Ahlinder." Aachen : Shaker, 2006. http://d-nb.info/1170538037/34.

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Karim, Fazal. "Parallel Heart Analysis Algorithms Utilizing Multi-core for Optimized Medical Data Exchange over Voice and Data Networks." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-51087.

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In today’s research and market, IT applications for health-care are gaining huge interest of both IT and medical researchers. Cardiovascular diseases (CVDs) are considered the largest cause of death for both men and women regardless of ethnic backgrounds. More efficient treatments and most importantly efficient methods of cardiac diagnosis that examine heart diseases are desired. Electrocardiography (ECG) is an essential method used to diagnose heart diseases. However, diagnosing any cardiovascular disease based on the 12-lead ECG printout from an ECG machine using human eye might seriously im

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Ahamat, Mohamad Asmidzam. "Development of a novel adsorption calorimeter : applications to silica gels bonded to flat and finned metal heat exchange surfaces." Thesis, University of Bristol, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.556717.

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The primary objective of this thesis was to develop a novel adsorption calorimeter to assess the equilibrium and dynamic behaviour of adsorbent-bond- metal sub-system, a constituent of an adsorption chiller. In this research, a novel calorimeter consisting of an adsorber and an evaporator section has been built. Thermoelectric modules were used to control the temperature and measure the instantaneous heat flow at the adsorber and evaporator sections. This thermoelectric module system was tested against an inert aluminium sample. The aluminium sample temperatures were controlled to constant, si

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Tribes, Christophe. "Étude du transfert de chaleur et de masse lors de la condensation de vapeur d'eau en présence d'incondensable : Application à la prédiction des performances thermiques des échangeurs multitubulaires à ailettes planes continues." Valenciennes, 1999. https://ged.uphf.fr/nuxeo/site/esupversions/f8d0e33e-b849-4ad7-bd9a-6eea9de41bd5.

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L’étude présentée dans ce mémoire traite du transfert de chaleur et de masse lorsque la condensation de vapeur d'eau survient au sein d'un écoulement interne d'air humide. L’application de ce travail est la prédiction des performances thermiques des échangeurs multitubulaires à ailettes planes fonctionnant en régime humide. Une étude expérimentale est menée pour caractériser la condensation dans un canal bidimensionnel pour trois écartements. Les puissances transférées sont déterminées à l'aide d'un bilan de chaleur et de masse sur l'air humide. L’interaction entre les gouttelettes de condensa

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Criscioni, Ferreira Patricia Fabiola. "Application of an open circuit indirect calorimetry system for gaseous exchange measurements in small ruminant nutrition." Doctoral thesis, Universitat Politècnica de València, 2016. http://hdl.handle.net/10251/64069.

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[EN] The main objective of this Thesis was to study the energy metabolism in small ruminants under different nutrition sceneries. As methodology we utilized indirect calorimetry instead of direct calorimetry or feeding trials. Within indirect calorimetry we worked with a portable open circuit gas exchange system with a head hood. This open circuit respiration system permitted completed the whole energy balance and evaluate the efficiency of utilization of the energy of the diet for different physiological circumstances as milk production in dairy goats or maintenance in sheep. Besides, we coul

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