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Дисертації з теми "Rankin cycle"

Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 26 липня 2025

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1

Staněk, Štěpán. "Paroplynová turbína pro akumulaci energie." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417553.

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Анотація:
Master thesis discusses the growing need of electric energy storage and its effectivity and capacity. It describes an overview of possible technologies with their advantages and disadvantages. Greater attention is paid to the storage of energy in gas, so-called Power to Gas, which combines the electrolytic production of hydrogen from water and the Sabatier reaction to produce synthetic methane. This technology is introduced in the so-called SIT Brno cycle of Siemens Industrial Turbomachinery company. The main part of the thesis is focused on the description of this cycle and on the calculation
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2

Landelle, Arnaud. "Experimental and numerical study of transcritical Organic Rankine Cycles for low-grade heat conversion into electricity from various sources." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI090/document.

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Анотація:
Le Cycle Organique de Rankine (abrégé ORC de l’anglais Organic Rankine Cycle) est une technologie permettant la conversion de chaleur basse température en électricité. L’ORC transcritique a été identifié comme une solution prometteuse pour la valorisation de la chaleur fatale. Cependant, peu d’installations expérimentales ont permis de confirmer ces performances. Ce travail de thèse présente le fonctionnement et l’optimisation d’ORC sous-critique et transcritique pour la conversion de chaleur basse température en électricité à partir de différentes sources. Premièrement, les contextes thermody
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3

Joska, Jakub. "Charakteristiky ventilátorových chladicích věží." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443198.

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This diploma thesis deals with the problematics of fan cooling towers. The very first part of the text is research, focusing mainly on the theory of cooling and the function of fan cooling towers in general. The following chapter deals with the water resource management of the Dukovany nuclear power plant and the specification of its objects of forced draft cooling towers. The second part describes a computational model created to determine the cooling performance of these towers under the given input conditions. In the following chapters, the results from the computational model are compared
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4

Brandsar, Jo. "Offshore Rankine Cycles." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-19069.

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Анотація:
The title of the thesis - "Offshore Rankine Cycles" - is very general and cover a large range of engineering fields, e.g. thermodynamic cycles (Rankine, ORC, Brayton, Kalina, etc.), mechanical equipment (gas/steam turbine, heat exchangers and additional equipment) and safety concerns (flammable and/or toxic fluids, high temperature and pressures), to name the most important.The thesis try to give a brief overview of all critical points and alternatives, concerning employment of a waste heat recovery machine on offshore facilities, although focus has been on three more specified cases
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5

Igobo, Opubo. "Low-temperature isothermal Rankine cycle for desalination." Thesis, Aston University, 2016. http://publications.aston.ac.uk/28569/.

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In brackish groundwater desalination, high recovery ratio (of fresh water from saline feed) is desired to minimise concentrate reject. To this effect, previous studies have developed a batch reverse osmosis (RO) desalination system, DesaLink, which proposed to expand steam in a reciprocating piston cylinder and transmit the driving force through a linkage crank mechanism to pressurise batches of saline water (recirculating) in a water piston cylinder unto RO membranes. However, steam is largely disadvantaged at operation from low temperature (< 150oC) thermal sources; and organic working fluid
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6

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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7

Dahlqvist, Johan. "Impulse Turbine Efficiency Calculation Methods with Organic Rankine Cycle." Thesis, KTH, Kraft- och värmeteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-104174.

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Анотація:
A turbine was investigated by various methods of calculating its efficiency. The project was based on an existing impulse turbine, a one-stage turbine set in an organic Rankine cycle with the working fluid being R245fa. Various methods of loss calculation were explored in the search for a method sufficiently accurate to make valid assumptions regarding the turbine performance, while simple enough to be time efficient for use in industrial research and development.  The calculations were primarily made in an isentropic manner, only taking into account losses due to the residual velocity present
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8

Chandrasekaran, Vetrivel. "Virtual Modeling and Optimization of an Organic Rankine Cycle." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1408456065.

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9

Somayaji, Chandramohan 1980. "First and second law analysis of Organic Rankine Cycle." Diss., Mississippi State : Mississippi State University, 2008. http://library.msstate.edu/etd/show.asp?etd=etd-03102008-143144.

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10

Collings, Peter. "Theoretical and experimental analysis of an organic Rankine Cycle." Thesis, University of Glasgow, 2018. http://theses.gla.ac.uk/30642/.

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Анотація:
In order to reduce emissions of carbon dioxide from the energy and transportation sectors, while still providing a reliable and affordable service, innovation in the fields of power generation and energy efficiency is needed. There exists a wide variety of low-temperature heat sources, such as waste heat from industry and transportation, solar thermal, biomass and geothermal, which contain large amounts of energy, but do not have sufficient temperature to be economically viable using traditional power generation techniques. Several technologies have been proposed to utilise these promising res
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11

Хамза, Хамза Алі Адел. "Вибір та обґрунтування параметрів дизель-електричної станції з системою утилізації теплоти". Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/31934.

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Анотація:
Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.05.03 – двигуни та енергетичні установки. – Національний технічний університет "Харківський політехнічний інститут". – Харків, 2017. Дисертація присвячена вибору і обґрунтуванню параметрів дизель-електричної станції з системою утилізації вторинної теплоти дизеля з використанням циклу Ренкіна, що використовує теплоту відпрацьованих газів та системи охолодження. В результаті аналізу особливостей перспективної енергетичної установки з двигуном Hyundai 25/33 для виробництва електричної енергії на заводі в Іраку р
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12

Mička, Radek. "Design průmyslového kotle s možností kogenerace." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-319495.

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Анотація:
The diploma thesis deals with the design of the industrial boiler for biomass, Which deals with the issue of the energy future of combustion of fuels using current power generation - microcogeneration, designed for larger houses or smaller com- panies. The shape of the device is the interconnection of individual functional and technological parts of the boiler, a view of a new product that re ects its function. It uses modern and timeless materials, color and control technology to achieve overall comfort and time savings and service.
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13

Drescher, Ulli. "Optimierungspotenzial des Organic Rankine Cycle für biomassebefeuerte und geothermische Wärmequellen /." Berlin : Logos-Verl, 2008. http://deposit.d-nb.de/cgi-bin/dokserv?id=3126519&prov=M&dok_var=1&dok_ext=htm.

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14

Daminabo, Ferdinand Frank Oko. "A novel 2kWe biomass-organic rankine cycle micro cogeneration system." Thesis, University of Nottingham, 2009. http://eprints.nottingham.ac.uk/10985/.

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Анотація:
Energy is potentially at the hub of modern civilization and right from Industrial Revolution, technology has refined and redefined the way we use energy; but technological advancement in all spheres will continue to depend and use energy to progress. However, fossil fuels (coal, gas, oil) have remained the dominant energy resource accounting for a larger proportion of world energy consumption when compared to nuclear energy and renewable energy resources. There are mounting fears of both the climate and our environment reaching a characteristic tipping point due to global warming. This is asso
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15

Taylor, Leighton John. "Development of a low temperature geothermal organic rankine cycle standard." Thesis, University of Canterbury. Mechanical, 2015. http://hdl.handle.net/10092/10427.

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Анотація:
The growth in renewable electricity generation is forecast to continue as fossil fuel levels decrease and carbon dioxide emissions are penalized. The growth in geothermal is becoming constrained as conventional high-temperature sources are fully exploited. Geothermal can be a cost competitive base load power source. Governments and utilities are looking at the potential of electricity generation from low temperature geothermal resources for future development. This technology, unlike the high and medium temperature, is not mature and there are a number of companies looking at entering the Orga
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16

Pižorn, Žiga. "Implementation of an Organic Rankine cycle on a Stepping furnace." Thesis, KTH, Kraft- och värmeteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-147933.

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Анотація:
In this master thesis an implementation of an Organic Rankine Cycle (ORC) on a stepping furnace in a steel mill is modeled and proposed. The study is a case study at the company Štore&amp;STEEL d.o.o. with intentions of realization. In a steel mill a stepping furnace is used to preheat the steel billets for later forging. The stepping furnace is gas fired and already has recuperation of the inlet air implemented. Still there is high temperature of the stack after recuperation, which makes application of an ORC worth of researching and modeling.First the flue gas over one year of furnace operat
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17

HERRERIA, ERNESTO JAVIER RUANO. "SIMULATION OF AN ORGANIC RANKINE CYCLE POWERED BY SOLAR ENERGY." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2012. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=21796@1.

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FUNDAÇÃO DE APOIO À PESQUISA DO ESTADO DO RIO DE JANEIRO<br>Esta simulação considera um ciclo Rankine que utiliza um fluido de trabalho orgânico, com a particularidade que a fonte de energia de entrada ao sistema será solar. Esta energia renovável que provem do potencial do Sol é aproveitada com a utilização de coletores concentradores lineares parabólicos. Estes dois circuitos: do ciclo Rankine orgânico e do conjunto de coletores interatuam termicamente mediante um trocador de calor chamado de gerador de vapor. Adicionalmente, existe um sistema de armazenamento térmico que permite acumular pa
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18

Ranade, Vishakhdutt. "Dynamic Modeling of Rankine Cycle using Arbitrary Lagrangian Eulerian Method." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491562460235764.

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19

Drescher, Ulli. "Optimierungspotenzial des organic rankine cycle für biomassebefeuerte und geothermische Wärmequellen." Berlin Logos-Verl, 2007. http://d-nb.info/989242536/04.

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20

Hamza, Hamza Ali Adel. "Selection and justification the parameters of diesel power plant with heat recovery system." Thesis, NTU "KhPI", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/31664.

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Анотація:
Dissertation for the degree of candidate of technical sciences in specialty 05.05.03 – engines and power plants. – National Technical University "Kharkiv Polytechnic Institute". – Kharkiv, 2017. The dissertation is devoted to the choice and substantiation of parameters of a diesel power plant with heat recovery system of recycling the secondary heat from diesel engine using the Rankin cycle, which uses the heat of exhaust gases and cooling water systems. As a result of the analysis of the features of a promising power plant with a Hyundai 25/33 engine for the production of electric power at a
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21

Хамза, Хамза Алі Адел. "Вибір та обґрунтування параметрів дизель-електричної станції з системою утилізації теплоти". Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/31663.

Повний текст джерела
Анотація:
Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.05.03 – двигуни та енергетичні установки. – Національний технічний університет "Харківський політехнічний інститут". – Харків, 2017. Дисертація присвячена вибору і обґрунтуванню параметрів дизель-електричної станції з системою утилізації вторинної теплоти дизеля з використанням циклу Ренкіна, що використовує теплоту відпрацьованих газів та системи охолодження. В результаті аналізу особливостей перспективної енергетичної установки з двигуном Hyundai 25/33 для виробництва електричної енергії на заводі в Іраку р
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22

Badr, O. M. "Development of a low-grade energy engine with a multi-vane expander as the prime mover." Thesis, Cranfield University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.482949.

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23

Cox, Jennifer Marie. "Analysis of a tubular solid oxide fuel cell topping cycle with a modified rankine bottoming cycle." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/17531.

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24

ENNAS, GIANFRANCO. "Technological cycles, Meta-Ranking and Open Access Performance." Doctoral thesis, Università degli Studi di Cagliari, 2015. http://hdl.handle.net/11584/266821.

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Анотація:
This thesis consists of three essays, linked by innovation, classification and change. In the first paper, I analyze a theoretical problem regarding the reemergence and affirmation of a technological paradigm over the others; in the second article, I propose a framework to aggregate journal rankings and classify academic journals; in the third essay I analyze the performance of Open Access journals, considered an innovative form of publishing, with the aim of identifying the main features of top-rated ones. More specifically, the first essay deals on the technological life cycle which e
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25

Rowshanzadeh, Reza. "Performance and cost evaluation of Organic Rankine Cycle at different technologies." Thesis, KTH, Tillämpad termodynamik och kylteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-32385.

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26

Santoso, Moeljadi Christensen Richard Neils. "An alternative configuration of Rankine cycle engine-driven heat pump system /." Connect to resource, 1989. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1144698627.

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27

Santoso, Moeljadi. "An alternative configuration of Rankine cycle engine-driven heat pump system." The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1144698627.

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28

Oelofse, Stephanus Phillipus. "An investigation into the performance of a Rankine-heat pump combined cycle / Stephanus Phillipus Oelofse." Thesis, North-West University, 2012. http://hdl.handle.net/10394/9185.

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Анотація:
The global growth in electricity consumption and the shortcomings of renewable electricity generation technologies are some of the reasons why it is still relevant to evaluate the performance of power conversion technologies that are used in fossil fuel power stations. The power conversion technology that is widely used in fossil fuel power stations is the Rankine cycle. The goal of this study was to determine if the efficiency of a typical Rankine cycle can be improved by adding a heat pump as a bottoming cycle. Three simulation models were developed to perform this evaluation. The first
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29

Liamini, Mokhtar. "Conception d'une microturbine cycle Rankine microfabriquée pour le fonctionnement à haute température." Thèse, Université de Sherbrooke, 2014. http://hdl.handle.net/11143/5425.

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Анотація:
Le projet présenté ici consiste en la conception et l’étude de faisabilité d’une microturbopompe de type Rankine destinée à être opérée à haute température. Une étude préliminaire est d’abord effectuée pour déterminer la configuration globale ainsi que les matériaux possibles pour l’isolation thermique du dispositif. Il en découle la nécessité d’utiliser des matériaux isolants pour le rotor et la structure statique. Les matériaux retenus sont le quartz et le Pyrex et la surface de la structure statique doit être réduite tout en s’assurant de la solidité du dispositif. Le domaine d’application
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30

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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Анотація:
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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31

Schuster, Andreas M. [Verfasser]. "Nutzung von Niedertemperaturwärme mit Organic-Rankine-Cycle-Anlagen kleiner Leistung / Andreas Schuster." München : Verlag Dr. Hut, 2011. http://d-nb.info/1015605532/34.

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32

Siviter, Jonathan Peter. "Increasing the efficiency of the Rankine cycle using a thermoelectric heat pump." Thesis, University of Glasgow, 2014. http://theses.gla.ac.uk/5802/.

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Анотація:
Thermal plants operating on the Rankine cycle are by far the most common method of global electrical power generation. The Rankine cycle, first developed in the late 19th century, continues to this day to be one of the most important practical implementations of a heat engine. Innovation and enhancement of the cycle continues and today's emphasis is directed towards reduced carbon emissions from the combustion of fossil fuel as well as improvement of the absolute efficiency. This thesis presents an increase in the Rankine cycle efficiency through reducing the waste heat rejected from the proce
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33

Pumaneratkul, Chayadit. "Basic characteristics of Rankine cycle with functional elements, using supercritical carbon dioxide." Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13097320/?lang=0, 2018. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13097320/?lang=0.

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34

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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35

Webster, Jack Ryan. "Suitability of the Kalina Cycle for Power Conversion from Pressurized Water Reactors." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6882.

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Анотація:
The primary objective of this work is to determine the Kalina cycle's suitability for thermal power conversion from a pressurized water reactor. Several previous papers have examined this application, but these either lack proof of concept or make unfeasible assumptions. This work expands current knowledge by simulating the Kalina cycle and comparing it to current pressurized water reactor Rankine cycles in order to identify which is more efficient. Prerequisite to the modeling is a simulation tool capable of modeling the thermodynamics of ammonia/water mixtures. Instead of using an existing p
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36

Gabrielli, Paolo. "Design and optimization of turbo-expanders for organic rankine cycles." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/6829/.

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Анотація:
In a world focused on the need to produce energy for a growing population, while reducing atmospheric emissions of carbon dioxide, organic Rankine cycles represent a solution to fulfil this goal. This study focuses on the design and optimization of axial-flow turbines for organic Rankine cycles. From the turbine designer point of view, most of this fluids exhibit some peculiar characteristics, such as small enthalpy drop, low speed of sound, large expansion ratio. A computational model for the prediction of axial-flow turbine performance is developed and validated against experimental data. Th
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37

El, Chammas Rody. "Cycle Rankine adapté à un véhicule hybride : simulation et conception d'un premier démonstrateur." Paris, ENMP, 2005. http://www.theses.fr/2005ENMP1317.

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38

Johnston, Jon R. Jr. "Evaluation of expanders for use in a solar-powered Rankine Cycle Heat Engine." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1298561887.

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39

Ebhuomhan, Sarah. "Effectiveness of using Organic Rankine cycle engine in small-scale district heating systems." Thesis, Linnéuniversitetet, Institutionen för byggd miljö och energiteknik (BET), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-105294.

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Co-production of electricity and heat using biomass is important in providing sustainable energy for the future. District heating systems, which are well established in Sweden, provide a great opportunity to co-produce electricity simultaneously. With small-scale district heating comprising majority of the district heating systems in Sweden, there is great potential for electricity production. The overall efficiency of the primary energy use of the cogeneration system of electricity and heat from district heating systems shows its sustainability advantage and energy benefits. The cost effectiv
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40

Orlandini, Valentina <1988&gt. "Waste Heat Recovery Systems: Numerical and Experimental Analysis of organic Rankine Cycle Solutions." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amsdottorato.unibo.it/8023/1/orlandini_valentina_tesi.pdf.

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This thesis aims to present the ORC technology, its advantages and related problems. In particular, it provides an analysis of ORC waste heat recovery system in different and innovative scenarios, focusing on cases from the biggest to the lowest scale. Both industrial and residential ORC applications are considered. In both applications, the installation of a subcritical and recuperated ORC system is examined. Moreover, heat recovery is considered in absence of an intermediate heat transfer circuit. This solution allow to improve the recovery efficiency, but requiring safety precautions. Possi
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41

RANDI, Saverio. "Numerical approaches to the study of organic Rankine cycle systems for decentralized applications." Doctoral thesis, Università degli studi di Ferrara, 2020. http://hdl.handle.net/11392/2488075.

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Organic Rankine Cycle systems (ORCs) are a well-known technology to obtain useful work from energy sources whose temperature and thermal power are too low for being exploited with conventional steam Rankine cycles: this is possible because water is replaced by an organic fluid, which is characterized by a lower ebullition temperature, allowing its vaporization and consequent expansion for smaller thermal inputs. Because of this, ORCs make it possible to generate power from a broad series of heat sources, such as low-temperature, renewable energy ones (as in geothermal and solar fields), indu
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42

Holmgren, Magnus. "Utveckling av dataanalysprogram för Opcon Powerbox." Thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-121736.

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Opcon Powerbox is a product developed by Opcon together with the underlying company SRM (Svenska Rotor Maskiner) where surplus heat from the industry is used through an Organic Rankine Cycle (ORC)–process to produce electricity. An ORC-process is a thermodynamic circle process in which a refrigerant is used as the working fluid. The refrigerant makes it possible for the circle process to operate at lower temperatures than the conventional Rankine process. In this master’s thesis a data analysis software for the Opcon Powerbox has been developed in which measurement data is retrieved and handle
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43

Supak, Kevin Robert. "Reduced gravity Rankine cycle system design and optimization study with passive vortex phase separation." Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2094.

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Liquid-metal Rankine power conversion systems (PCS) coupled with a fission reactor remain an attractive option for space power applications because system specific power and efficiency is very favorable for plant designs of 100 kW(e) or higher. Potential drawbacks to the technology in a reduced gravity environment include two-phase fluid management processes such as liquid-vapor phase separation. The most critical location for phase separation is at the boiler exit where only vapor must be sent to the turbine because blade erosion occurs from high velocity liquid droplets entrained by vapor fl
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44

Shao, Yingjuan. "Development and evaluation of a biomass-fired micro-scale CHP with organic rankine cycle." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/13597/.

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Combined Heat and Power Generation (CHP) or cogeneration has been considered worldwide as the major alternative to traditional energy systems in terms of signi ticant energy saving and environmental conservation. A renewable energy resource-fuelled CHP would deliver even more environmental benefits than a fossil tuel-driven CHP. Biomass is one of the renewable energy resources that plays an important role to the world primary energy supplies and can be used to fuel CHP systems. Many medium- and large-scale biomass-fired CHP plants have been demonstrated and commercialized in the world. However
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45

Choquet, Vincent. "Integrated engine waste heat recovery by combination ofevaporative engine cooling and Rankine bottoming cycle." Thesis, KTH, Maskinkonstruktion (Inst.), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-156866.

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Engine Cooling losses constitutes about 20% of the injected fuel energy in a modern heavy duty truck diesel engine. The objective of this Master Thesis Project is to investigate flow boiling cooling as a thermally efficient method for waste heat recovery as well as a good solution for precision cooling. First, an engine heat transfer model was implemented on GT-suite software in order to estimate heat fluxes within the engine cylinder. Liners being less thermally constrained than the cylinder head, flow boiling cooling was then investigated in the liner’s water jackets. A more adapted heat tra
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46

Peralez, Johan. "Récupération d'énergie par cycle de Rankine à bord d'un véhicule : commande et gestion énergétique." Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10024/document.

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Au moins 30% de l'énergie produite par les moteurs à combustion interne est dissipée sous forme de chaleur dans les gaz d'échappement. L'intérêt des constructeurs pour les systèmes de récupération de chaleur bases sur le cycle thermodynamique de Rankine est justifié par des réductions de consommation espérées entre 5 et 10%. L'ambition de cette thèse est de contribuer à lever les principaux verrous liés à la gestion des procédés Rankine pour des applications ≪ mobiles ≫. Ce manuscrit s'appuie sur trois cas d'étude avec, pour chacun, un procédé pilote destiné à être intégré respectivement sur d
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47

Venieri, Giulia. "Development and testing of Model Predictive Controllers for an automotive organic Rankine cycle unit." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022.

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Two-thirds of the energy produced by an internal combustion engine (ICE) is lost into waste heat through the coolant and the exhaust gas; hence, studying Waste Heat Recovery (WHR) systems is of vital importance. The organic Rankine cycle (ORC) is a powerful system to recover low-grade heat and transform it into electrical energy. This thesis aimed at developing and testing a Model Predictive Control (MPC) system that ensures a safe operation of a system that constitutes an ICE bottomed by an ORC unit. The experimentation was carried out at the DTU Mekanik laboratories and was divided into dif
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48

Kalua, Tisaye Bertram. "Analysis of factors affecting performance of a low-temperature Organic Rankine Cycle heat engine." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/17844.

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Organic Rankine Cycle (ORC) heat engines convert low-grade heat to other forms of energy such as electrical and mechanical energy. They achieve this by vaporizing and expanding the organic fluid at high pressure, turning the turbine which can be employed to run an alternator or any other mechanism as desired. Conventional Rankine Cycles operate with steam at temperatures above 400 ℃. The broad aspect of the research focussed on the generation of electricity to cater for household needs. Solar energy would be used to heat air which would in turn heat rocks in an insulated vessel. This would act
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49

Di, Cairano Luca. "Etude d'un système réversible climatisation/cycle Rankine organique : application au cas du véhicule terrestre." Thesis, Paris Sciences et Lettres (ComUE), 2019. http://www.theses.fr/2019PSLEM066.

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La récupération de chaleur dans les véhicules est une solution prometteuse permettant de réduire la consommation du moteur et de ses émissions. Les fortes contraintes de poids, compacité et coût présentes dans le domaine automobile empêchent l’intégration d’un système de récupération de chaleur dans le véhicule. Une solution proposée dans ce travail consiste en un système de multi-génération appelé ReverCycle. Ce dernier fonctionne avec trois modes: climatisation à compression de vapeur, cycle de Rankine Organique (ORC) et cycle de réfrigération à éjecteur. Le système peut assurer un seul mode
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50

Riddle, Derek S. "Model Order Reduction and Control of an Organic Rankine Cycle Waste Heat Recovery System." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu150055199341535.

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