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Dissertations / Theses on the topic 'Thermodynamic cycle'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Yang, Chen. "Thermodynamic Cycles using Carbon Dioxide as Working Fluid : CO2 transcritical power cycle study." Doctoral thesis, KTH, Tillämpad termodynamik och kylteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-50261.

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The interest in utilizing the energy in low‐grade heat sources and waste heat is increasing. There is an abundance of such heat sources, but their utilization today is insufficient, mainly due to the limitations of the conventional power cycles in such applications, such as low efficiency, bulky size or moisture at the expansion outlet (e.g. problems for turbine blades). Carbon dioxide (CO2) has been widely investigated for use as a working fluid in refrigeration cycles, because it has no ozonedepleting potential (ODP) and low global warming potential (GWP). It is also inexpensive, non‐explosi

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2

LEAL, MARCO AURELIO. "THERMODYNAMIC ANALYSIS OF A REFRIGERATION CYCLE USING AN EJECTOR." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1992. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=19458@1.

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Apresenta-se neste trabalho uma análise termodinâmica comparativa entre o desempenho de um ciclo de refrigeração que usa um ejetor como um pré-expansor do fluido refrigerante e um ciclo padrão de refrigeração por compressão de vapor. Na primeira etapa do trabalho é desenvolvido um modelo matemático em regime é desenvolvido um modelo matemático em regime permanente baseado na primeira Lei da Termodinâmica para cada um dos ciclos estudados. O modelo é capaz de prever o funcionamento de cada um dos componentes do ciclo, assim como do sistema geral. Ao modelo do ejetor é dada uma especial atenção.

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3

Conlon, Paul. "Thermodynamic analysis of supercharged, fuel-injected two-stroke cycle engines." Thesis, Queen's University Belfast, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317435.

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4

Arthur, Daniel Tettey. "Hybrid thermodynamic life cycle assessment of gasoline and ethanol blends." The Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406030567.

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5

Brown, Mark. "Simulations for thermodynamic analyses of transcritical carbon dioxide refrigeration cycle and reheat dehumidification air conditioning cycle." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001599.

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6

Santos, Ana Paula Pereira dos. "Thermodynamic analysis of gas turbine cycle using inlet air cooling methods." Instituto Tecnológico de Aeronáutica, 2012. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=2024.

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This work focuses on a comparative analysis among three compressor inlet air cooling techniques using a thermodynamic approach to simulate the gas turbine cycle. Firstly, a Base Case is tested to determine the gas turbine performance without any cooling method. The effect of site altitude on the power output gas turbine even without any cooling technique is also simulated. After, the evaporative cooling, absorption and mechanical refrigeration chillers are studied under different ambient temperature and relative humidity. Results showed that the cooling potential of the evaporative system is d

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7

Hemadri, Vinayak B. "Thermodynamic analysis and optimization of multi-pressure, multi-component organic rankine cycle." Thesis, IIT Delhi, 2016. http://localhost:8080/iit/handle/2074/7039.

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8

Moxon, Matthew. "Thermodynamic analysis of the Brayton-cycle gas turbine under equilibrium chemistry assumptions." Thesis, Cranfield University, 2011. http://dspace.lib.cranfield.ac.uk/handle/1826/9237.

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A design-point thermodynamic model of the Brayton-cycle gas-turbine under assumptions of perfect chemical equilibrium is described. This approach is novel to the best knowledge of the author. The model uniquely derives an optimum work balance between power turbine and nozzle as a function of flight conditions and propulsor efficiency. The model may easily be expanded to allow analysis and comparison of arbitrary cycles using any combination of fuel and oxidizer. The model allows the consideration of engines under a variety of conditions, from sea level/static to >20 km altitude and flight

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9

Blanco, Cavero Diego. "Assessment and optimization of the indicated cycle with a 0D thermodynamic model." Doctoral thesis, Universitat Politècnica de València, 2019. http://hdl.handle.net/10251/115934.

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[ES] Las amenazas a las que se enfrentan los motores de combustión interna, tales como emisiones contaminantes, agotamiento del petróleo o el auge de otros tipos de motores (vehículo eléctrico), vinculan el futuro de los vehículos propulsados por este tipo de motor a la mejora del mismo en cuanto a consumo de combustible y a emisiones contaminantes se refiere. Adicionalmente, la alta exigencia de la normativa actual y venidera está forzando a las empresas de automoción a centrarse en el desarrollo de estrategias innovadoras dirigidas a aumentar el rendimiento del motor con baja repercusión en

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10

Martin, Christopher L. "Study of cooling production with a combined power and cooling thermodynamic cycle." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0008332.

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11

Kloppers, Cornelius Petrus. "Thermodynamic cycle design of a Brayton–Rankine combined cycle for a pebble bed modular reactor / Cornelius Petrus Kloppers." Thesis, North-West University, 2011. http://hdl.handle.net/10394/7623.

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The rapid development in nuclear technology worldwide has created the need for an efficient power conversion unit to extract the energy from the new generation IV reactors. The generation IV reactor currently under investigation in South Africa is the PBMR–DPP (Pebble Bed Modular Reactor Demonstration Power Plant) based on the High temperature Reactor Modul. This reactor produces 200 MW of thermal energy at inlet/outlet temperatures of 250oC/700oC. Due to the reactor layout and accompanying thermal fluid path design outlet temperatures in the order of 900oC would be possible. This dissertation

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12

JUNIOR, CARLOS THOMAZ GUIMARAES LOPES. "THERMODYNAMIC COMPARISON BETWEEN A TRADITIONAL RANKINE CYCLE WITH AN INNOVATIVE RANKINE CYCLE USING RESIDUAL GASES FROM THE SIDERURGIC PROCESS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2007. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=11329@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>O presente trabalho realiza uma comparação entre o ciclo Rankine tradicional e uma nova proposta de ciclo Rankine para uma planta de cogeração na indústria siderúrgica. O ciclo inovador é caracterizado por um sistema de regeneração por injeção direta de vapor seguida de bombeamento bifásico substituindo o uso de pré-aquecedores como no ciclo tradicional. Para a simulação dos ciclos de potência é empregado o Software Gate Cycle. São simuladas e estudadas diversas alternativas de configuração para a aplicação da nova tecnologia. A melh

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13

Huang, Ran. "Exact Thermodynamic Calculation of a Monatomic System and Its Ideal Glass Transition on a New Recursive Lattice Formed by Cubic Units." University of Akron / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=akron1239653703.

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14

Ukidwe, Nandan Uday. "Thermodynamic input-output analysis of economic and ecological systems for sustainable engineering." Connect to this title online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1117555725.

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Thesis (Ph. D.)--Ohio State University, 2005.<br>Title from first page of PDF file. Document formatted into pages; contains xxiii, 306 p.; also includes graphics (some col.) Includes bibliographical references (p. 297-306). Available online via OhioLINK's ETD Center

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15

Popa, Nicolae Lucretiu. "Applications of thermodynamic laws to evaluation of steam cycle performance of Point Lepreau Generating Station." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0016/MQ54641.pdf.

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16

Ercan, Taylan. "Thermodynamic And Structural Design And Analysis Of A Novel Turbo Rotary Engine." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606482/index.pdf.

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A novel turbo rotary engine, operating according to a novel thermodynamic cycle, having an efficient compression phase, a limited temperature combustion phase followed by a long power extraction phase is designed. Thermodynamic and structural design and analysis of this novel engine is carried out and two prototypes are manufactured according to these analysis. High performance figures such as torque, power and low specific fuel consumption are calculated. Also the component tests of the manufactured prototypes are completed and their results are demonstrated.

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17

White, Thomas J. "Development of a parametric analysis microcomputer model for evaluating the thermodynamic performance of a reciprocating Brayton cycle engine." PDXScholar, 1987. https://pdxscholar.library.pdx.edu/open_access_etds/3794.

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In this thesis, applicable data from research on IC engines have been adapted to PACE engine designs. Data from studies on heat transfer, friction, and pressure losses, in particular, have been used. Certain parameters which define operation and design characteristics appear to influence PACE engine performance very strongly. Some of the more critical parameters, notably friction and heat transfer coefficients, must be determined experimentally if accurate model results are to be expected. Pressure ratio, compressor RPM, and maximum combustor temperature, the independent operating parameters,

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18

Hischier, Illias. "CO₂ splitting via a solar thermochemical cycle based on Zn/ZnO redox reactions: thermodynamic and kinetic analysis." Zürich : ETH, Swiss Federal Institute of Technology Zurich, Institute of Energy Technology, 2008. http://e-collection.ethbib.ethz.ch/show?type=dipl&nr=360.

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19

Vijayaraghavan, Sanjay. "Thermodynamic studies on alternate binary working fluid combinations and configurations for a combined power and cooling cycle." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0001112.

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20

Pathak, Dushyant. "Use of a thermodynamic cycle simulation to determine the difference between a propane-fuelled engine and an iso-octane-fuelled engine." Texas A&M University, 2005. http://hdl.handle.net/1969.1/3278.

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A thermodynamic cycle simulation of the four-stroke spark-ignition engine was used to determine the effects of variations in engine design and operating parameters on engine performance and emission characteristics. The overall objective was to use the engine cycle simulation to determine the difference between a propane-fuelled and an iso-octane-fuelled engine for the same operating conditions and engine specifications. A comprehensive parametric investigation was conducted to examine the effects of variations in load, speed, combustion duration, spark timing, equivalence ratio, exhaust gas r

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21

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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22

Hosseini, Araghi Alireza. "A novel discharge thermal energy combined desalination and power cycle utilising a vacuum spray flash evaporator." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2016. https://ro.ecu.edu.au/theses/1945.

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Environmental destruction, global warming and limited potable water resources are problems often mentioned in opinion polls that ask the public to identify major problems to be solved, this century. Demand for freshwater continues to grow, but sufficient natural sources are not always available. One solution is to supply potable water from seawater using desalination technology. Most conventional desalination systems are very energy intensive and use energy supplied by fossil fuels. There is a new interest to utilise low grade energy and couple a desalinator with a thermal process such as oil,

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23

Oak, Sushil Shreekant. "Second law analysis of premixed compression ignition combustion in a diesel engine using a thermodynamic engine cycle simulation." Texas A&M University, 2008. http://hdl.handle.net/1969.1/86040.

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A second law analysis of compression ignition engine was completed using a thermodynamic engine cycle simulation. The major components of availability destruction and transfer for an entire engine cycle were identified and the influence of mode of combustion, injection timing and EGR on availability balance was evaluated. The simulation pressure data was matched with the available experimental pressure data gathered from the tests on the Isuzu 1.7 L direct injection diesel engine. Various input parameters of the simulation were changed to represent actual engine conditions. Availability destru

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24

Hau, Jorge L. "Toward environmentally conscious process systems engineering via joint thermodynamic accounting of industrial and ecological systems." The Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=osu1117650243.

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25

Agudelo, Paula A. "Role of Local Thermodynamic Coupling in the Life Cycle of the Intraseasonal Oscillation in the Indo-Pacific Warm Pool." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19834.

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Intraseasonal oscillations (ISOs) are important elements of the tropical climate with time-scales of 20-80 day. The ISO is poorly simulated and predicted by numerical models. This work presents a joint diagnostic and modeling study of the ISO that examines the hypothesis that local coupling between the ocean and the atmosphere is essential to the existence and evolution of the ISO in the Indo-Pacific warm pool region. Low-level moistening during the transition phase preconditions the atmosphere for deep convection. The vertical structure of ISO from the ECMWF coupled model during different ph

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26

Nouman, Jamal. "Comparative studies and analyses of working fluids for Organic Rankine Cycles - ORC." Thesis, KTH, Tillämpad termodynamik och kylteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-102534.

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27

Nahhas, Tamar. "Materials and thermal storage systems by sensible heat for thermodynamic electro-solar plants." Thesis, Perpignan, 2017. http://www.theses.fr/2017PERP0027.

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L'énergie solaire est connue pour sa nature intermittente par rapport aux ressources d’énergie fossile. Cette observation souligne la nécessité d'utilisation d’un système de stockage d'énergie thermique. Le système de stockage thermocline est considéré comme un système de stockage rentable. La présente thèse vise à étudier le potentiel des roches basaltiques et siliceuses comme des candidates matériaux de stockage pour les centrales solaires concentrées. Les études expérimentales des propriétés thermo-physiques et thermomécaniques de ces roches à des températures allant jusqu'à 1000°C montrent

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28

Meas, Matthew Robert. "Thermodynamic design optimisation of an open recuperative twin-shaft solar thermal Brayton cycle with combined or exclusive reheating and intercooling." Master's thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/25450.

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The Gouy-Stodola Theorem implies that the net power output of a system can be maximised by synchronously sizing the components, thus minimising the cumulative entropy generation rate. The resulting optimal design is related to, and therefore characteristic of, the cycle configuration, since the entropy generation rates in the individual components are interdependent. In this work, optimal design of three common open solar thermal Brayton cycle variants is investigated and compared using principles of the second law of thermodynamics and the method of entropy generation minimisation. The basic

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29

Deutz, Kevin Ruben. "Optimisation du cycle de fonctionnement d'un chauffe-eau thermodynamique résidentiel." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI006/document.

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Le chauffe-eau thermodynamique (CET), dont le principe repose sur une pompe à chaleur (PAC), est l’une des principales solutions pour répondre à l’enjeu de réduction des consommations énergétiques des bâtiments liées à l’eau chaude sanitaire. Le CET le plus courant sur le marché français est composé d’une PAC sur air extérieur, au R134a, dont le condenseur est de type manteau, entourant le ballon de stockage. Bien que le système arrive à maturité, les performances annuelles semblent encore loin des performances théoriques. Cette thèse a donc pour objectif l’optimisation des performances énergé

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30

FURTADO, LEANDRO ANDRADE. "THERMODYNAMIC, ECONOMIC AND ENVIRONMENTAL STUDY OF A COGENERATION SUGARCANE PLANT OPERATING WITH A HYBRID CYCLE THAT BURNS SUGARCANE BAGASSE AND NATURAL GAS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2018. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=35597@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>O crescimento da demanda por energia elétrica e investimentos governamentais em fontes renováveis incentivam produtores do setor sucro-energético no país a buscar melhorias nos processos de suas usinas. Através do aumento da produção de vapor nas caldeiras de biomassa, que operam com ciclos Rankine, é possível gerar energia elétrica excedente para comercialização. O Brasil, um dos maiores produtores de cana-de-açúcar do mundo, gera resíduos derivados da cana com alto potencial energético. Os ciclos termodinâmicos híbridos têm sido utilizado

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31

SELICATI, VALERIA. "Innovative thermodynamic hybrid model-based and data-driven techniques for real time manufacturing sustainability assessment." Doctoral thesis, Università degli studi della Basilicata, 2022. http://hdl.handle.net/11563/157566.

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This doctoral thesis is the result of the supervision and collaboration of the University of Basilicata, the Polytechnic of Bari, and the enterprise Master Italy s.r.l. The main research lines explored and discussed in the thesis are: sustainability in general and, more specifically, manufacturing sustainability, the Industry 4.0 paradigm linked to smart (green) manufacturing, model-based assessment techniques of manufacturing processes, and data-driven analysis methodologies. These seemingly unrelated topics are handled throughout the thesis in such a way that it reveal how strongly interwov

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32

Long, Henry A. III. "Development and Thermodynamic Analysis of an Integrated Mild/Partial Gasification Combined Cycle (IMPGC) Under Green and Brown Field Conditions With and Without Carbon Capture." ScholarWorks@UNO, 2018. https://scholarworks.uno.edu/td/2538.

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Coal is a very prominent energy source in the world, but it is environmentally unattractive due to its high sulfur and ash content as well as its alleged contribution towards climate change, but it is affordable, abundant, and has high energy content. Thus, utilizing coal in a cleaner and more efficient way has become necessary. One promising clean coal technology involves fully gasifying coal into synthesis gas, cleaning it, and feeding it into a high-efficiency combined cycle, such as an Integrated Gasification Combined Cycle (IGCC). Inspired by the recent success of warn gas cleanup (WGCU),

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33

Pham, Hong Son. "Investigation of the supercritical CO2 cycle : mapping of the thermodynamic potential for different applications; further understanding of the physical processes, in particular through simulations and analysis of experimental data." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4338.

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Cette thèse évalue d'abord le potentiel thermodynamique du cycle au CO2 supercritique (sc-CO2) pour une large gamme de température de source chaude et étudie son couplage aux applications nucléaires, 45.7% d’efficacité thermique étant obtenu pour un réacteur à neutrons rapides refroidi au sodium. Des simulations CFD sont réalisées sur un compresseur à échelle réduite et confrontées à une expérience, apportant des éléments de qualification. Des simulations sur un compresseur à échelle 1:1 révèlent des particularités liées à la compression du sc-CO2 au comportement gaz réel, offrant un retour d’

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34

Tkachuk, Andriy. "Smíšený tepelný cyklus." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229753.

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This master thesis follows the bachelor thesis with the same name. It is looks into the analyses of the combi-cycle, the advantage of which is high efficiency and easy separation of CO2 for its storage and further usage. It introduces the Graz cycle, its thermal balance a basic arrangement. The calculation is attached in a separate .XLS file. At the end of the thesis, the result of the calculation is interpreted and the conditions under which the project would be realized are outlined.

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Černý, Roman. "Výpočtová studie Millerova cyklu benzínového motoru s turbodmychadlem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318533.

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The scope of this thesis is the Miller engine cycle analysis and its practical application on a turbocharged spark ignited engine. Based on the sensitivity analysis of the limits affecting the ideal Miller cycle thermal efficiency a thermodynamic model of the engine with a prolonged expansion was set up in the GT-POWER software. The results of the analyses were used to evaluate the feasibility of the reference engine conversion for an operation with Miller cycle.

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Veleba, Lukáš. "Parní turbína o výkonu 300 MW." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378707.

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The Diploma thesis named Steam Turbine 300 MW contains the proposal of the Turboset for the steam section of the gas-steam cycle. There is a calculation of the thermal cycle, and a thermodynamic calculation of the combined high pressure - as well as intermediate pressure and low pressure parts. Strength calculation of particular parts and a check of the critical turbine speed follow on from this. This thesis includes a drawing of the cross-section of HP-IP and partial operations. My thesis has been commissioned by Doosan Škoda Power.

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Trollier, Thierry. "Réfrigération cryogénique par cycle de Joule-Thomson utilisant des mélanges de gaz." Grenoble INPG, 1995. http://www.theses.fr/1995INPG0047.

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Une des principales applications de la refrigeration cryogenique par cycle de joule-thomson consiste au refroidissement, dans la gamme 80-100 k, de detecteurs infrarouges ou de composants electroniques, au sol ou embarques. Pour ce type d'application, la simplicite technologique et la robustesse des mini-refroidisseurs utilises en circuit ouvert a l'atmosphere (alimentation a partir de reservoirs de gaz comprime) sont gages de fiabilite. Cependant, l'efficacite mediocre du cycle, due a une consommation specifique ainsi qu'un rapport de pressions hp/bp eleves, le rend inadapte aux applications

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38

Besbes, Karim. "Pompes à chaleur à haute température récupérant la chaleur sur des buées ou de la vapeur d'eau à moyenne température." Thesis, Paris, ENMP, 2015. http://www.theses.fr/2015ENMP0091/document.

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La pompe à chaleur industrielle très haute température (PAC THT) à compression mécanique de vapeur, fonctionnant à l'électricité, figure parmi l'une des technologies innovantes les plus efficaces permettant de valoriser les rejets thermiques industriels à basse et moyenne température (<90 °C). Néanmoins, compte tenu des besoins industriels actuels de chaleur, les niveaux de température cible atteignable par les PACs restent trop faibles et freinent fortement son implantation. Les procédés de séchage, dans leur grande majorité, rejettent des buées ou de la vapeur d'eau à moyenne température

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39

El, outmani Sohaïb. "On-line estimation of thermodynamic properties for Lithium-Ion battery state of health and composition analysis." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAT111.

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Les batteries rechargeables et notamment les batteries Li-Ion sont déjà présentes dans une multitude d'applications parmi lesquelles on peut citer le stockage d'énergie éolienne ou solaire, les téléphones portables, les avions et les automobiles. Dans ce dernier secteur, la part de marché des véhicules hybrides ou électriques devrait bondir de 1% à 30% dans les prochaines années, les batteries vont donc connaître un essor sans précédent.Dans toutes ces applications, le diagnostic des batteries représente un enjeu majeur en termes de performance et de sécurité. L'actualité est riche d'exemples

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40

Soška, Michal. "Ueharův tepelný oběh." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231369.

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This Diploma thesis describes design of the computational model of Uehara power cycle, with ammonia-water mixture used as working fluid. First part is dedicated to issue of determination working mixture thermodynamic properties, which are essential for computational model design. The second part of this thesis describes the methodology of computing power cycle by system matrix solving method. For purposes of methodology testing, model of Kalina power cycle was also created. Computational models of Uehara and Kalina cycles are designed in Excel and are an integral part of this thesis. Text part

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41

Crétaz, Fanny. "Etude de la solubilité et des cinétiques de dissolution des phosphates et vanadates d'uranium : implications pour l'amont du cycle électronucléaire." Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20244/document.

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De manière à répondre à l'accroissement des besoins en uranium, l'exploitation de nouvelles ressources de composition minéralogique variée devient une nécessité. De plus, dans une perspective de développement durable, les procédés d'exploitation et de traitement des minerais d'uranium requièrent une optimisation afin de réduire leur empreinte environnementale. Dans ce but, il est nécessaire d'acquérir des données thermodynamiques fiables relatives aux systèmes d'intérêt, dont en particulier les phosphates et les vanadates d'uranium (VI). Dans ce contexte, une étude multiparamétrique de la diss

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Liu, Bo. "Modélisation d'un cycle de production d'électricité bi-étagé à aéro-réfrigérant sec." Phd thesis, Ecole Nationale Supérieure des Mines de Paris, 2014. http://pastel.archives-ouvertes.fr/pastel-01069070.

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La production d'électricité dépend étroitement de la disponibilité d'une source froide. C'est la raison pour laquelle la plupart des centrales de grande puissance dans le monde sont construites près d'une source d'eau. Le problème de la source froide a été soulevé à plusieurs reprises en France, notamment après les canicules de 2003 et de 2006. Le refroidissement à l'air sec est une des options possibles. Cependant, étant donné le besoin de surface d'échange plus important, le changement de la source froide pour l'air ambiant n'est pas, dans la majorité des cas, viable économiquement.Une des s

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Southon, Michael Carl. "Performance and cost evaluation to inform the design and implementation of Organic Rankine Cycles in New Zealand." Thesis, University of Canterbury. Mechanical Engineering, 2015. http://hdl.handle.net/10092/10728.

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The aim of this thesis is to evaluate ORC systems and technologies from an energy and economic perspective. ORC systems are a growing renewable electricity generation technology, but New Zealand has limited local skills and expertise for identifying ORC resource opportunities and subsequently developing suitable technologies at low cost. For this reason, this thesis researches ORC technology, resource types, and international development, with the aim to determine guidelines for how to cost-effectively develop ORC systems, and to make recommendations applicable to furthering their development

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Samiei, Kasra. "Entropy analysis as a tool for optimal sustainable use of biorefineries." Thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-18679.

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The biorefinery concept is attractive. Increasing international concerns over issuessuch as climate change have led to political as well as social pressures for a shift fromfossil fuels to renewable resources and biomass is one abundant renewable resource.Biomass has the potential of supplying many of the fuels and chemicals which arecurrently dependent on petroleum. Much development is still needed in the field ofbiorefineries and a systematic approach to evaluate and compare process technologiesand to suggest optimizations seems necessary.The objective of this thesis is to develop entropy an

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Desrues, Tristan. "Stockage massif d'électricité sous forme thermique." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00627054.

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Les travaux présentés dans cette thèse concernent un nouveau procédé de stockage d'électricité à échelle industrielle, sous forme de stockage de chaleur sensible. La chaleur est stockée dans deux échangeurs gaz-solide de grande taille appelés régénérateurs qui sont reliés à une paire de turbomachines (compresseur et turbine) formant ainsi un cycle thermodynamique. Selon le sens d'écoulement du fluide caloporteur, ce cycle est de type " pompe à chaleur " en stockage ou " moteur thermique " en déstockage. La modélisation complète du procédé a permis de caractériser son comportement dans un cas i

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Demirkaya, Gökmen. "Theoretical and Experimental Analysis of Power and Cooling Cogeneration Utilizing Low Temperature Heat Sources." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3069.

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Development of innovative thermodynamic cycles is important for the efficient utilization of low-temperature heat sources such as solar, geothermal, and waste heat sources. Binary mixtures exhibit variable boiling temperatures during the boiling process, which leads to a good thermal match between the heating fluid and working fluid for efficient heat source utilization. This study presents a theoretical and an experimental analysis of a combined power/cooling cycle, which combines the Rankine and absorption refrigeration cycles, uses ammonia-water mixture as the working fluid and produces pow

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Rahn, Marco Aurélio dos Santos. "Estudo da eficiência energética em sistemas de refrigeração mecânica que utilizam R-717 contaminado por água uma aplicação para a indústria pesqueira de Rio Grande." reponame:Repositório Institucional da FURG, 2006. http://repositorio.furg.br/handle/1/3625.

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Dissertação(mestrado)-Universidade Federal do Rio Grande, Programa de Pós-Graduação em Engenharia Oceânica, Escola de Engenharia, 2006.<br>Submitted by Lilian M. Silva (lilianmadeirasilva@hotmail.com) on 2013-04-23T21:28:50Z No. of bitstreams: 1 Estudo da eficiência energetica em sistemas de refrigeracao mecanica que utilizam r 717 contaminado por Água Uma Aplicação Para A Indústria Pesqueira de Rio Grande.pdf: 9060063 bytes, checksum: 062f3d7bf45bc90a87b8e3cd34a178fe (MD5)<br>Approved for entry into archive by Gabriela Silva da Rosa(gabrielasilvadarosa@gmail.com) on 2013-07-01T21:31:07Z (GMT

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Schwamberger, Valentin [Verfasser], and M. [Akademischer Betreuer] Gabi. "Thermodynamische und numerische Untersuchung eines neuartigen Sorptionszyklus zur Anwendung in Adsorptionswärmepumpen und -kältemaschinen = Thermodynamic and numerical investigation of a novel sorption cycle for application in adsorption heat pumps and chillers / Valentin Schwamberger ; Betreuer: M. Gabi." Karlsruhe : KIT-Bibliothek, 2016. http://d-nb.info/1116427583/34.

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Teh, Kwee-Yan. "Thermodynamics of efficient, simple-cycle combustion engines /." May be available electronically:, 2007. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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Walters, Joseph D. "Optimization and Thermodynamic Performance Measures of a Class of Finite Time Thermodynamic Cycles." PDXScholar, 1990. https://pdxscholar.library.pdx.edu/open_access_etds/1186.

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Modifications to the quasistatic Carnot cycle are developed in order to formulate improved theoretical bounds on the thermal efficiency of certain refrigeration cycles that produce finite cooling power. The modified refrigeration cycle is based on the idealized endoreversible finite time cycle. Two of the four cycle branches are reversible adiabats, and the other two are the high and low temperature branches along which finite heat fluxes couple the refrigeration cycle with external heat reservoirs. This finite time model has been used to obtain the following results: First, the performance of

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