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Tesi sul tema "Heat-engines"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 31 luglio 2024

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1

Barr, William Gerald. "Low heat rejection diesel engines." Thesis, University of Nottingham, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254429.

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2

Bardaweel, Hamzeh Khalid. "Dynamic characterization of a micro heat engine." Online access for everyone, 2007. http://www.dissertations.wsu.edu/Thesis/Fall2007/H_Bardaweel_110107.pdf.

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3

Baird, A. J. "Heat Transfer from Air Cooled Engines." Thesis, Queen's University Belfast, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.517206.

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4

Lee, Victoria D. Lee (Victoria Dawn). "Waste heat reclamation in aircraft engines." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/97318.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 94-96).<br>Introduction: Rotorcraft engines can lose up to 70% of the potential chemical energy of their fuel as waste heat. Harvesting this waste heat and converting it to useful work would improve the efficiency and power output of the engine. Figure 1 shows two possible engine systems in which a secondary engine could be used to harvest waste heat. For the gas turbine engine in Figure 1A, the main source of wa

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5

Clarke, Ralph Henry. "Heat losses in internal combustion engines." Master's thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/8290.

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Bibliography: leaves 119-121.<br>This thesis deals with the effects of cooling and heat losses in internal combustion engines. The object of this work was to examine and research various cooling concepts and methods to reduce heat loss to engine coolant, improve thermal efficiency and to predict heat transfer values for these alternatives. The optimum system to be considered for possible application to small rural stationary engines. A literature survey was undertaken, covering work performed in the field of internal combustion engine cooling. Besides the conventional cooling system, two conc

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6

Finger, Erik J. "Two-stage heat engine for converting waste heat to useful work." online access from Digital Dissertation Consortium, 2005. http://libweb.cityu.edu.hk/cgi-bin/er/db/ddcdiss.pl?3186905.

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7

Gidugu, Praveen. "Effect of adding a regenerator to Kornhauser's MIT "two-space" test rig." Cleveland, Ohio : Cleveland State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=csu1212595450.

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Thesis (M.S.)--Cleveland State University, 2008.<br>Abstract. Title from PDF t.p. (viewed on July 9, 2008). Includes bibliographical references (p. 100-103). Available online via the OhioLINK ETD Center. Also available in print.

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8

Lemaire, Lacey-Lynne. "Miniaturized stirling engines for waste heat recovery." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=107690.

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Portable electronic devices have made a profound impact on our society and economy due to their widespread use for computation, communications, and entertainment. The performance and autonomy of these devices can be greatly improved if their operation can be powered using energy that is harvested from the ambient environment. As a step towards that goal, this thesis explored the feasibility of developing miniaturized Stirling engines for harvesting waste heat. A mesoscale (palmtop-size) gamma-type Stirling engine, with a total volume of about 165 cubic centimeters, was manufactured using conve

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9

Boswell, Michael John. "Gas engines for domestic engine-driven heat pumps." Thesis, Oxford Brookes University, 1992. http://radar.brookes.ac.uk/radar/items/37f7ed18-4b86-6ab3-8ba6-1c27947fb1ce/1.

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An experimental and theoretical investigation has been undertaken into the performance of a small prototype, water-cooled, gas-fuelled engine designed for use as a domestic heat pump prime mover. In light of the application, fuel type and capacity, both experimental and theoretical study of similar engines is at best poorly documented in the literature. A comprehensive engine test facility has been set up, incorporating extensive calorimetry, a separate lubrication system, emissions monitoring and high speed data acquisition for in-cylinder pressure measurement and analysis. Two new experiment

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10

Villalta, Lara David. "RADIATION HEAT TRANSFER IN DIRECT-INJECTION DIESEL ENGINES." Doctoral thesis, Universitat Politècnica de València, 2019. http://hdl.handle.net/10251/114793.

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En las últimas décadas, la investigación en motores de combustión ha estado enfocada fundamentalmente en la reducción de las emisiones contaminantes y la eficiencia de los mismos. Estos hechos junto con un aumento de la concienciación sobre el cambio climático han llevado a un aumento en la importancia de la eficiencia térmica respecto a otros criterios en el diseño de motores de combustión interna (MCIA). Para alcanzar este objetivo, existen diferentes estrategias a aplicar. En concreto, la transferencia de calor a las paredes de la cámara de combustión puede ser considerada como una de las p

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11

Koll, Daniel D. B., and Thaddeus D. Komacek. "Atmospheric Circulations of Hot Jupiters as Planetary Heat Engines." IOP PUBLISHING LTD, 2018. http://hdl.handle.net/10150/627038.

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Because of their intense incident stellar irradiation and likely tidally locked spin states, hot Jupiters are expected to have wind speeds that approach or exceed the speed of sound. In this work, we develop a theory to explain the magnitude of these winds. We model hot Jupiters as planetary heat engines and show that hot Jupiters are always less efficient than an ideal Carnot engine. Next, we demonstrate that our predicted wind speeds match those from three-dimensional numerical simulations over a broad range of parameters. Finally, we use our theory to evaluate how well different drag mechan

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12

Clark, David Anthony. "High performance heat engines for solar and biomass applications." Thesis, Queensland University of Technology, 1993. https://eprints.qut.edu.au/226903/1/T%28BE%26E%29%20375_Clark_1993.pdf.

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Generation systems which are fuelled by renewable energy sources, such as solar and biomass, are the environmentally-preferred option for the production of electricity and heat. This study examines the technical and economic feasibility of small-scale (less than 1 MW) renewable generation systems based on a steam-driven engine. Specifically, the study investigates the thermodynamic and mechanical design of the engine. The theory of engine operation is presented in Chapter 3 of this thesis. A computor model of the engine was used to predict the performance of different engine configurat

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13

Reid, Robert Stowers. "Open cyclic thermoacoustics." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/15850.

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14

Savur, Mehmet Koray. "A numerical study of combined convective and radiative heat transfer in a rocket engine combustion chamber." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02Dec%5FSavur.pdf.

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15

Leathard, Matthew James. "Computational modelling of coolant heat transfer in internal combustion engines." Thesis, University of Bath, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248102.

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16

Ruiz, Joaquin G. 1981. "Waste heat recovery in automobile engines : potential solutions and benefits." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32832.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.<br>Includes bibliographical references (leaves 32-33).<br>Less than 30% of the energy in a gallon of gasoline reaches the wheels of a typical car; most of the remaining energy is lost as heat. Since most of the energy consumed by an internal combustion engine is wasted, capturing much of that wasted energy can provide a large increase in energy efficiency. For example, a typical engine producing 100 kilowatts of driveshaft power expels 68 kilowatts of heat energy through the radiator and 136 kilowatts

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17

Ragozin, Konstantin. "Thrust Performance and Heat Load Modelling of Pulse Detonation Engines." Thesis, Luleå tekniska universitet, Institutionen för system- och rymdteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-82438.

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Pulse Detonation Engines (PDEs) are propulsion systems that use repeated detonations to generate thrust. Currently in early stages of development, PDEs have been theorised to have advantages over current deflagration based engines. Air-breathing PDEs could attain higher specific impulse values and operate at higher Mach numbers than today's air-breathing engines, while Pulse Detonation Rocket Engines (PDREs) could become a lighter, cheaper, and more reliable alternative to traditional rocket engines. There are still however, many technological hurdles to overcome before PDEs can be developed i

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18

Kwan, Pok Wang. "Flow management in heat exchanger installations for intercooled turbofan engines." Thesis, University of Oxford, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.711622.

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19

Melia, Thomas. "Heat transfer characteristics of pulse combustors for gas turbine engines." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/10278.

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Conventional gas turbine combustors operate with a designed drop in pressure over the length of the device. This is desired in order to encourage mixing within the combustor. Compared to this, pulse pressure gain combustors are an alternative to the conventional combustor that produces an increase in static pressure between the inlet and exhaust of the device. The removal of the combustor pressure loss increases the efficiency of the combustion process by increasing the amount of work produced. Many types of pulsed pressure gain combustors exist. Of these, the valveless pulse combustor is the

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20

Trujillo, Alba Marcela Herrera. "Quantum heat engines and energy fluctuations in many-body systems." reponame:Repositório Institucional da UFABC, 2017.

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21

Stowe, Robert Alan. "Heat transfer from a circular cylinder subject to an oscillating crossflow as in a stirling engine regenerator." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26741.

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An experiment was designed and carried out on the fundamental, but poorly understood problem of oscillating flow past a single, transverse, circular cylinder. This is an approximation of the flow about a single element in a matrix-type regenerator used in Stirling-cycle engines. The experimental rig was designed and built to allow tests to be carried out for the wide range of fluid flow parameters characteristic of various Stirling engines. The influence of these parameters on convective heat transfer rates was measured so the approximate effects of these same parameters on a Stirling engine r

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22

Weiss, Leland W. "A novel MEMS-based micro heat engine and operating cycle." Online access for everyone, 2008. http://www.dissertations.wsu.edu/Dissertations/Spring2008/L_Weiss_041708.pdf.

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23

Hoegel, Benedikt. "Thermodynamics-based design of stirling engines for low-temperature heat sources." Thesis, University of Canterbury. Mechanical Engineering, 2014. http://hdl.handle.net/10092/9344.

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Large amounts of energy from heat sources such as waste-eat and geothermal energy are available worldwide but their potential for useful power-generation is largely untapped. This is because they are relatively low temperature difference (LTD) sources, in the range from 100 to 200 °C, and it is thermodynamically diffcult, for theoretical and practical reasons, to extract useful work at these temperatures. This work explores the suitability of a Stirling engine (SE) to exploit these heat sources. Elsewhere much work has been done to optimise Stirling engines for high temperature heat sources, b

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24

Mukherjee, Smarajit. "Time- and Space-resolved Heat Transfer Model for Spark-Ignition Engines." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1517440404339384.

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25

Wekin, Andrew Brian Evans. "Characterization and comparison of piezoelectric materials for transducing power from a thermoacoustic engine." Online access for everyone, 2008. http://www.dissertations.wsu.edu/Thesis/Summer2008/A_wekin_051908.pdf.

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26

Mzolo, Noluthando Precious Duduzile. "Modelling the performance of a calorifier installed at a university residence intended to be retrofited by an air source heat pump." Thesis, University of Fort Hare, 2017. http://hdl.handle.net/10353/4660.

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Sanitary hot water production contributes significantly to the electrical energy consumption in the university campus. An in-depth understanding of the current hot water technology, number of students, capacity of water used per student, time of use of hot water, total volume of hot water consumed and the total energy used on an average weekday in a university residence are very crucial in opting for energy efficient technology like an air source heat pump (ASHP) water heater. The study focused on quantitative and qualitative analysis of data collected for the hot water profiles in one of the

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27

Jung, Sungmin. "Advancement of small-scale thermoacoustic engine." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Spring2009/s_jung_042109.pdf.

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Thesis (M. in mechanical engineering )--Washington State University, May 2009.<br>Title from PDF title page (viewed on Apr. 12, 2010). "School of Mechanical and Material Engineering." Includes bibliographical references (p. 48-49).

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28

Crowther, Shamal Mena. "The development of a fast response measurement system for use in turbomachinery applications." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/51044/.

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Improvements in the efficiency of power generation via turbomachinery are essential in order to reduce greenhouse gas emissions throughout the world. Advancements in measurement techniques are therefore crucial to understanding the main areas of energy loss in turbines and compressors. This thesis presents a novel system which allows that loss to be characterised using fast response, 3-D measurements of the pressure field within industrial scale rigs. Turbulent energy dissipation rates give an insight into where useable energy is lost from. To gain an insight into such rates, measurement techn

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29

Crain, Kevin Richard. "Mechanical characterization and thermal modeling of a MEMS thermal switch." Online access for everyone, 2005. http://www.dissertations.wsu.edu/Thesis/Fall2005/k%5Fcrain%5F120905.pdf.

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30

McNeil, Kirsten Elizabeth. "Energy loss characterization of the P3 MEMS heat engine." Online access for everyone, 2006. http://www.dissertations.wsu.edu/Thesis/Summer2006/k%5Fmcneil%5F062906.pdf.

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31

Finkbeiner, David L. "Calculation of gas-wall heat transfer from pressure and volume data for spaces with inflow and outflow." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-12042009-020320/.

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32

Humphrey, Tammy Ellen Physics Faculty of Science UNSW. "Mesoscopic quantum ratchets and the thermodynamics of energy selective electron heat engines." Awarded by:University of New South Wales. Physics, 2003. http://handle.unsw.edu.au/1959.4/19186.

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A ratchet is an asymmetric, non-equilibrated system that can produce a directed current of particles without the need for macroscopic potential gradients. In rocked quantum electron ratchets, tunnelling and wave-reflection can induce reversals in the direction of the net current as a function of system parameters. An asymmetric quantum point contact in a GaAs/GaAlAs heterostructure has been studied experimentally as a realisation of a quantum electron ratchet. A Landauer model predicts reversals in the direction of the net current as a function of temperature, amplitude of the rocking voltage,

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33

Wang, Xiaowei. "Instantaneous in-cylinder heat transfer and combustion analysis in spark ignition engines." Thesis, University of Oxford, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.497138.

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34

Bauer, Wolf-Dietrich. "Heat transfer and mixture vaporization in intake systems of spark ignition engines." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10421.

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35

Denzler, Tobias [Verfasser], and Eric [Akademischer Betreuer] Lutz. "Fluctuations and correlations of quantum heat engines / Tobias Denzler ; Betreuer: Eric Lutz." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2020. http://d-nb.info/1227304072/34.

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36

Panesar, Angad Singh. "Waste heat recovery using fluid bottoming cycles for heavy duty diesel engines." Thesis, University of Brighton, 2015. https://research.brighton.ac.uk/en/studentTheses/2e7faf1c-93fc-47b7-90f7-a6704ea95230.

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A typical long-haul heavy duty Diesel engine currently rejects up to 50% of the total fuel energy in the form of heat. Due to increasing CO2 emissions and fuel costs, there is a growing interest in techniques that can even partially utilise this wasted resource to improve the overall system efficiency. Fluid Bottoming Cycles (FBC) including Rankine and organic Rankine cycles offer one means towards converting waste heat into usable power. This thesis investigates the potential of FBCs to improve the net power of two computationally modelled (Ricardo WAVE V8.1) 10 litre engine platforms operati

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37

Alexander, W. D. "The design and evaluation of components for low heat loss diesel engines." Thesis, University of Bath, 1989. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236717.

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38

Chagnon-Lessard, Noémie. "Maximizing power output of heat engines through design optimization : Geothermal power plants and novel exhaust heat recovery systems." Doctoral thesis, Université Laval, 2020. http://hdl.handle.net/20.500.11794/38297.

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Le design de machines thermiques menant à une puissance maximale dépend souvent des températures de la source chaude et de la source froide. C’est pourquoi dégager des lignes directrices à partir des designs optimaux de ces machines selon diverses températures d’opération peut faciliter leur conception. Une telle étude est proposée par cette thèse pour deux types de systèmes thermiques. En premier lieu, le cycle de Rankine organique (ORC) est un cycle thermodynamique de puissance utilisé entre autres dans les centrales géothermiques exploitant des réservoirs à basse température. Depuis quelque

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39

Huang, Shan. "Numerical and experimental study on pin-fin based cooling structure for gas turbine application." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/32471/.

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This project aims to provide an in-depth understanding on pin-fin based cooling structure for gas turbine heat transfer applications, particularly for turbine hot-path airfoil blade trailing edge cooling. Based on past researches, new cooling structures are then proposed and investigated. This thesis is comprised by four primary studies including three experimental studies and one numerical study. Transient thermochromic liquid crystal method was used to measure endwall heat transfer coefficient of the channel while lumped capacitance method was used to measure the average heat transfer coeffi

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40

Shafiei-Tehrany, Najmeddin. "Development of small-scale thermoacoustic engine and thermoacoustic cooling demonstrator." Online access for everyone, 2008. http://www.dissertations.wsu.edu/Thesis/Spring2008/N_Shafiei-Tehrany_042308.pdf.

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41

Jacob, David. "Analytical analysis of absorption cycles." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/16094.

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42

Lawrence, N. "The prediction of temperature distribution in air cooled diesel engine cylinder heads." Thesis, University of Brighton, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233062.

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43

Goh, Sing Huat. "Numerical study of the effect of the fuel film on heat transfer in a rocket engine combustion chamber." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Dec%5FGoh.pdf.

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Thesis (M.S. in Engineering Science (Mechanical Engineering))--Naval Postgraduate School, December 2003.<br>Thesis advisor(s): Ashok Gopinath, Christopher Brophy. Includes bibliographical references (p. 71-72). Also available online.

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44

Gewald, Daniela [Verfasser]. "Waste heat recovery of stationary internal combustion engines for power generation / Daniela Gewald." München : Verlag Dr. Hut, 2013. http://d-nb.info/1045987735/34.

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45

Henson, Jonathan Charles. "Numerical simulation of spark ignition engines with special emphasis on radiative heat transfer." Thesis, Loughborough University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297589.

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46

Bagheri, Amirhossein. "Characterization, Analysis, and Optimization of Rotary Displacer Stirling Engines." Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1609074/.

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This work focuses on an innovative Rotary Displacer SE (RDSE) configuration for Stirling engines (SEs). RDSE features rotary displacers instead of reciprocating displacers (found in conventional SE configurations), as well as combined compression and expansion spaces. Guided by the research question "can RDSE as a novel configuration achieve a higher efficiency compared to conventional SE configurations at comparable operating conditions?", the goal of this study is to characterize, analyze, and optimize RDSE which is pursued in three technical stages. It is observed the RDSE prototype has an

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47

Klein, Markus. "Single-Zone Cylinder Pressure Modeling and Estimation for Heat Release Analysis of SI Engines." Doctoral thesis, Linköping : Department of Electrical Engineering, Linköping University, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-9863.

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48

Friedenberger, Alexander [Verfasser], Eric [Akademischer Betreuer] Lutz, and Eric [Gutachter] Lutz. "Detecting quantum signatures in heat engines / Alexander Friedenberger ; Gutachter: Eric Lutz ; Betreuer: Eric Lutz." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2019. http://d-nb.info/1180724135/34.

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49

Espinosa, Nicolas. "Contribution to the study of waste heat recovery systems on commercial truck diesel engines." Thesis, Vandoeuvre-les-Nancy, INPL, 2011. http://www.theses.fr/2011INPL064N.

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L'augmentation du prix du pétrole ainsi qu'une possible future réglementation des émissions de CO2 encourage les fabricants de véhicules industriels à trouver de nouvelles solutions pour améliorer encore la performance de la chaine cinématique. Dans ce cadre, deux solutions de récupérations d'énergie prometteuses sont très souvent rapportées dans la littérature: le système de récupération d'énergie par cycle de Rankine et le générateur thermoélectrique. Après un rappel des conditions limites du fonctionnement d'un camion long routier, cette thèse démontre tout d’abord la modélisation 0-D et 1-

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50

Potier, Luc. "Large Eddy Simulation of the combustion and heat transfer in sub-critical rocket engines." Thesis, Toulouse, INPT, 2018. http://www.theses.fr/2018INPT0043/document.

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La combustion cryogénique dans les moteurs de fusée dits à propulsion liquide utilise généralement un couple d'ergols, le plus couramment composé d'hydrogène/oxygène (H2/O2). Privilégiée pour le fort pouvoir calorifique du dihydrogène, cette combustion à haute pression, induit des températures de fonctionnement très élevées et nécessite l'intégration d'un système de refroidissement. La prédiction des flux thermiques aux parois est donc un élément essentiel de la conception d'une chambre de combustion de moteur fusée. Ces flux sont le résultat d'écoulements fortement turbulents, compressibles,

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