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Dissertations / Theses on the topic 'Organic working fluid'

Author: Grafiati

Published: 2 June 2025

Last updated: 19 July 2025

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1

Da, Silva Rui Pitanga Marques. "Organic fluid mixtures as working fluids for the trilateral flash cycle system." Thesis, City University London, 1989. http://openaccess.city.ac.uk/7945/.

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The requirements for power generation systems have been reviewed together with the various energy sources available for them. Geothermal energy has been examined in more detail and the principal methods of recovering power from it which are currently employed are discussed. A novel method for improved power recovery from geothermal sources called the Trilateral Flash Cycle (TFC) system is described which has the special requirement of an efficient two-phase expander. Optimum results are obtained from this cycle if a working fluid is used which leaves the expander as dry saturated vapour. A bin

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2

Bamgbopa, Musbaudeen Oladiran. "Modeling And Performance Evaluation Of An Organic Rankine Cycle (orc) With R245fa As Working Fluid." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614367/index.pdf.

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This thesis presents numerical modelling and analysis of a solar Organic Rankine Cycle (ORC) for electricity generation. A regression based approach is used for the working fluid property calculations. Models of the unit&rsquo<br>s sub-components (pump, evaporator, expander and condenser) are also established. Steady and transient models are developed and analyzed because the unit is considered to work with stable (i.e. solar + boiler) or variable (i.e. solar only) heat input. The unit&rsquo<br>s heat exchangers (evaporator and condenser) have been identified as critical for the applicable met

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3

Xu, Zhi Guo. "An investigation of two-phase flow of organic working fluids in the inlet port of a Lysholm screw expander." Thesis, City University London, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294052.

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4

Mohamad, Salman. "EVALUATING THE ORGANIC RANKINE CYCLE (ORC) FOR HEAT TO POWER : Feasibility and parameter identification of the ORC cycle at different working fluid with district waste heat as a main source." Thesis, Mälardalens högskola, Framtidens energi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-38573.

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New technologies to converting heat into usable energy are constantly being developed for renewable use. This means that more interactions between different energy grid will be applied, such as utilizing low thermal waste heat to convert its energy to electricity. With high electricity price, such technology is quite attractive at applications that develop low waste heat. In the case of excess heat in district heating (DH) grid and the electricity price are high, the waste heat can be converted to electricity, which can bring a huge profit for DH companies. Candidate technologies are many and

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5

Amat, Albuixech Marta. "Búsqueda de fluidos de trabajo alternativos de bajo potencial calentamiento atmosférico para uso en Ciclos Orgánico Rankine de baja temperatura y pequeña potencia. Análisis de HCFO-1224yd(Z) como potencial candidato." Doctoral thesis, Universitat Jaume I, 2022. http://dx.doi.org/10.6035/14107.2022.427784.

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Esta tesis se centra en encontrar un fluido de bajo potencial calentamiento atmosférico (PCA) capaz de trabajar en instalaciones ORC de pequeña escala y baja temperatura previamente diseñadas para el uso de HFC-245fa. Para ello, además de revisar el estado en el que se encuentra esta tecnología, se realiza un estudio teórico y experimental. El estudio teórico compara el comportamiento del HFC-245fa con el de sus principales alternativas de bajo PCA: HCFO-1224yd(Z), HFO-1336mzz(Z), HCFO-1233zd(E), HFO-1234ze(Z), HFO-1336mzz(E) y R-514-A. Debido a sus similares resultados en cuanto a potencia y

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6

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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7

Khadra, Rami. "Nouvelle génération de transformateurs de chaleur, sélection de fluides de travail et optimisation des équipements du cycle en employant des technologies innovantes." Thesis, Paris, ENMP, 2015. http://www.theses.fr/2015ENMP0083.

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Ce travail contribue aux efforts de l'Union Européenne pour réduire les émissions de CO2. Son objectif est d'aider les industries produisant de la chaleur fatale à récupérer cette énergie perdue, d'augmenter sa température et de la réutiliser in situ. Les transformateurs de chaleur (Absorption Heat Transformers ou AHT), machines à absorption consommant très peu d'électricité, sont alors ici étudiés. Les AHTs existants rencontrent des problèmes comme la corrosion, la cristallisation, la toxicité et les niveaux de pression éloignés de la pression atmosphérique. Ceux-ci sont causés par les fluide

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8

Lampe, Matthias Verfasser], André [Akademischer Betreuer] [Bardow, and Joachim [Akademischer Betreuer] Gross. "Integrated design of process and working fluids for organic rankine cycles / Matthias Lampe ; André Bardow, Joachim Gross." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/1126971677/34.

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9

Eyerer, Sebastian [Verfasser]. "Contribution to Improve the Organic Rankine Cycle: Experimental Analysis of Working Fluids and Plant Architectures / Sebastian Eyerer." München : Verlag Dr. Hut, 2021. http://nbn-resolving.de/urn:nbn:de:101:1-2021100123320721813906.

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10

Lampe, Matthias [Verfasser], André [Akademischer Betreuer] Bardow, and Joachim [Akademischer Betreuer] Gross. "Integrated design of process and working fluids for organic rankine cycles / Matthias Lampe ; André Bardow, Joachim Gross." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://nbn-resolving.de/urn:nbn:de:hbz:82-rwth-2016-027963.

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11

Dubberke, Frithjof H. [Verfasser]. "Thermophysical properties from experimental speed of sound measurements for working fluids in organic Rankine cycles / Frithjof H. Dubberke." Paderborn : Universitätsbibliothek, 2017. http://d-nb.info/1166751856/34.

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12

Dijoux, Alexandre. "Influence du fluide du travail, de la technologie des échangeurs et du pilotage dynamique d’un cycle ORC sur l’intérêt et les performances d’un système de conversion d’Énergie Thermique des Mers." Thesis, La Réunion, 2020. http://www.theses.fr/2020LARE0036.

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La différence de température entre l’eau de mer chaude de surface (d’origine solaire tropicale) et celle qui est froide en profondeur (qui vient des pôles) constitue une source d’énergie stable, propre et renouvelable disponible dans l’océan. Cette énergie thermique des mers (ETM) peut être convertie en électricité par le cycle organique de Rankine (ORC). Le faible écart de température entre les sources chaudes et froides représente ce-pendant un défi technique à la fois pour les transferts thermiques et pour les performances du cycle. L’objectif de cette thèse est d’explorer les possibilités

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13

Chen, Huijuan. "The Conversion of Low-Grade Heat into Power Using Supercritical Rankine Cycles." Scholar Commons, 2010. http://scholarcommons.usf.edu/etd/3447.

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Low-grade heat sources, here defined as below 300 ºC, are abundantly available as industrial waste heat, solar thermal, and geothermal, to name a few. However, they are under-exploited for conversion to power because of the low efficiency of conversion. The utilization of low-grade heat is advantageous for many reasons. Technologies that allow the efficient conversion of low-grade heat into mechanical or electrical power are very important to develop. This work investigates the potential of supercritical Rankine cycles in the conversion of low-grade heat into power. The performance of supercri

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14

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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15

ROUT, SITANSU SATYAPRIYA. "EFFECT OF WORKING FLUID ON THERMODYNAMIC PERFORMANCE ANALYSIS OF ORGANIC RANKINE CYCLE (ORC)." Thesis, 2022. http://dspace.dtu.ac.in:8080/jspui/handle/repository/19341.

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Working fluids play a crucial part in Organic Rankine Cycle (ORC) which is able to recover the low grade heat from renewable or waste heat sources. Current work focuses on establishing the relationship between ORC performance parameters (First law efficiency, Second law efficiency, Turbine Size Factor (TSF), network output) and the source temperature, Turbine inlet Temperature Pinch point Temperature Difference and turbine efficiency by employing 4 different working fluid (RC318, R600a, R32, R134a). The working fluids are so chosen that two are dry fluids (RC318, R600a) having higher

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16

Teixeira, Hugo André Oliveira. "Avaliação de sistemas ORC (Organic Rankine Cycle) para aproveitamento de calor dos gases de escape de um automóvel." Master's thesis, 2015. http://hdl.handle.net/1822/41872.

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Dissertação de Mestrado em Engenharia Mecânica - Área de Especialização Energia e Ambiente<br>O consumo de combustíveis fósseis continua a aumentar, o que causa muitos problemas de sustentabilidade, levando ao aumento do interesse da redução da sua dependência. Além disso, as exigentes normas da União Europeia levam ao impulsionamento e desenvolvimento tecnológico da área automóvel, principalmente, na melhoria da sua eficiência energética e redução de emissões. O presente trabalho avalia o potencial de aproveitamento do calor residual dos gases de escape de um automóvel para produção de eletr

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17

Diogo, João Bernardo Cabral de Mascarenhas. "Preliminary assessment of carnot batteries as an innovative electrical energy storage." Master's thesis, 2021. http://hdl.handle.net/10316/97950.

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Dissertação de Mestrado Integrado em Engenharia Mecânica apresentada à Faculdade de Ciências e Tecnologia<br>Increased world-wide demand for energy (especially electricity), rising energy costs, and heightened environmental concerns are factors that continually press for the adoption of technologies to exploit the renewable energy sources (RES). However, due to the ever increasing share of RES in the energy mix, large-scale energy storage systems are considered essential to ensure the security of supply in energy systems.The purpose of this work arises from the need to find a new form of energ

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18

Cai, Jun-Lum, and 蔡郡倫. "Mixture Working Fluids on the Performance Analysis of an Organic Rankine Cycle System for Waste Heat Recovery." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/55wagz.

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碩士<br>國立高雄科技大學<br>造船及海洋工程系<br>107<br>Due to the decreasing of the available energy, most of the methods of current developments are to create new energy sources or save energy. Oil and natural gas are limited in quantity and may even decrease. In the recovery of heat energy, the waste heat exhaust gas discharged from diesel generators is converted into electric energy. However, the low temperature (250 °C) of waste heat emission in domestic industry accounts for 83%, which has potential for reusing, and this is the aim of this study. This study mainly uses the Organic Rankine Cycle (ORC) as th

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19

Hudson, Jamel. "Techno-Economic Analysis of Organic Rankine Cycles for a Boiler Station : Energy system modeling and simulation optimization." Thesis, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-400403.

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The Organic Rankine Cycle (ORC) may be the superior cycle for power generation using low temperature and low power heat sources due to the utilization of high molecular mass fluids with low boiling points. They are flexible, simple, easy to operate and maintain, and offer many possible areas of applications including waste heat recovery and power generation from biomass, geothermal and even solar energy. Therefore, they may prove to be of significant importance in reducing global greenhouse gas emission and in the mitigation of climate change. In this thesis the technical feasibility and econo

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