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Rozprawy doktorskie na temat „THERMAL ENERGY STORAGE SYSTEM (TES)”

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Data publikacji: 11 września 2023

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1

Darkwa, K. "Thermal energy storage (TES) systems involving thermochemical reactions." Thesis, Cranfield University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309836.

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PISTACCHIO, STEFANO. "Experimental measurement of the Molten Salts (MS) Thermal Conductivity and verification of the Thermocline stability in Thermal Energy Storage (TES) system." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2015. http://hdl.handle.net/2108/202929.

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A Thermal conductivity probe fo rhigh temperature(HT-TCP) has been built and tested. Its design and construction procedure are adapted from the ambient temperature ther- mal conductivity probe(AT-TCP) due to the good performance softhislast.The construction procedure and the preliminary tests are accurately described.The probe contains a PtwireasheaterandatypeKthermocouple(K-TC)as temperature sensor, and its size are so small (diameter0.6mmandlength60mm) to guaranteea length to diameter ratioofabout100.Calibration tests with glycerolfor temperatures between 0C and 60C have shown a good

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Ruiz-Cabañas, F. Javier. "Corrosion evaluation of molten salts thermal energy storage (TES) systems in concentrated solar power plants (CSP)." Doctoral thesis, Universitat de Lleida, 2020. http://hdl.handle.net/10803/671680.

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El protagonisme creixent de la tecnologia solar termoelèctrica entre el ventall de les energies renovables es centra en la seva capacitat d’adaptar la seva producció a la demanda energètica exigida. La gestionabilitat d’aquest tipus de centrals s’ha aconseguit amb la integració de sistemes d’emmagatzematge tèrmic en les mateixes. La major part dels sistemes d’emmagatzematge tèrmic, ja sigui els que s’utilitzen a nivell comercial com aquells que es troben en fase de desenvolupament proposen l’ús de sals inorgàniques foses com a medi d’emmagatzematge. Aquestes sals presenten l’inconvenient de

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Egersand, Anton, and Emil Fransson. "THE POTENTIAL OF A LATENT HEAT THERMAL ENERGY STORAGE : An Investigation on Rocklunda's Sport Facilities." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-55539.

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The world is ever increasing in its energy usage, making energy that is sustainable and secure harder to achieve. To fulfil the Paris agreement to limit global warming, the world needs to transition from fossil fuels toward more renewable energy sources, like wind and solar, but these sources have fluctuation in supply which often create a mismatch with demand. To combat this issue, thermal energy storage can be utilized, and one such technology is latent heat thermal energy storage. This study aimed to investigate the potential of latent heat thermal energy storage by developing a simple mode

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Gunasekara, Saman Nimali. "Phase Equilibrium-aided Design of Phase Change Materials from Blends : For Thermal Energy Storage." Doctoral thesis, KTH, Kraft- och värmeteknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-212440.

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Climate change is no longer imminent but eminent. To combat climate change, effective, efficient and smart energy use is imperative. Thermal energy storage (TES) with phase change materials (PCMs) is one attractive choice to realize this. Besides suitable phase change temperatures and enthalpies, the PCMs should also be robust, non-toxic, environmental-friendly and cost-effective. Cost-effective PCMs can be realized in bulk blends. Blends however do not have robust phase change unless chosen articulately. This thesis links bulk blends and robust, cost-effective PCMs via the systematic design o

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Prieto, Cristina. "Advanced thermal energy storage research in demo plants for commercial systems." Doctoral thesis, Universitat de Lleida, 2016. http://hdl.handle.net/10803/399235.

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La present tesis s’enmarca en el camp/sector de l’emmagatzematge d’energia tèrmica, concretament en el procès de disseny i optimització que comporta el desenvolupament d’una tecnologia d’emmagatzematge tèrmic. Per aquest fi s’han dissenyat, construit, operat i analitzat dues plantes prototip, la primera d’elles situada a la Universitat de Lleida amb una capacitate de 66 kWhth i la segona situada a la plataforma Solcar d’Abengoa, amb 8m5 MWhth. Al llarg d’aquesta tesis, es mostra el procès d’anàlisi, estudi i optimització realitzat per permetre desenvolupar els sistemes d’emmagatzematge tèrmic

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NIRMALANANDHAN, VICTOR SANJIT. "HEAT TRANSFER AUGMENTATION FOR EXTERNAL ICE-ON-TUBE TES SYSTEMS USING POROUS COPPER MESH TO INCREASE VOLUMETRIC ICE PRODUCTION." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1100796827.

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Santo, Luca. "AA-CAES physical modelling: integration of a 1D TES code and plant performance analysis." Thesis, Uppsala universitet, Tillämpad kärnfysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-360448.

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The focus of this thesis work was the development of an approachto couple a previosly existing Thermal Energy Storage (TES) modelwritten in C++ with a Simulink/Simscape plant model to simulate anAdvanced Adiabatic Compressed Air Energy Storage (AA-CAES) plant.After the creation and validation of such tool, the complete modelwas used to run simulations, with the aim of assessing the AA-CAESplant's performance under multiple patterns of charge anddischarge.Most of the works found in the literature only provide values ofstorage efficiency obtained from analytical approaches, whilethose that use s

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Xu, Ben. "Heat Transfer and Flow in Solar Energy and Bioenergy Systems." Diss., The University of Arizona, 2015. http://hdl.handle.net/10150/578616.

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The demand for clean and environmentally benign energy resources has been a great concern in the last two decades. To alleviate the associated environmental problems, reduction of the use of fossil fuels by developing more cost-effective renewable energy technologies becomes more and more significant. Among various types of renewable energy sources, solar energy and bioenergy take a great proportion. This dissertation focuses on the heat transfer and flow in solar energy and bioenergy systems, specifically for Thermal Energy Storage (TES) systems in Concentrated Solar Power (CSP) plants and op

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Gravoille, Pauline. "CASE STUDY OF ACTIVE FREE COOLING WITH THERMAL ENERGY STORAGE TECHNOLOGY." Thesis, KTH, Kraft- och värmeteknologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-77778.

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May 25, 2011, Reuters’ headline read: "New York State is prepared for summerelectricity demand". The NY operator forecasts for next summer a peak of 33GW, close to therecord ever reached. With soaring cooling demands, the electricity peak load represents a substantialconcern to the energy system. In the goal of peak shaving, research on alternative solutions based onThermal Energy Storage (TES), for both cooling and heating applications, has been largely performed.This thesis addresses thermal comfort applications with use of active free cooling through implementationof latent heat based TES.

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Oró, Prim Eduard. "Thermal energy storage (TES) using phase change materials (PCM) for cold applications." Doctoral thesis, Universitat de Lleida, 2013. http://hdl.handle.net/10803/110542.

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L’objectiu d’aquesta tesis doctoral és el desenvolupament d’un sistema d’emmagatzematge d’energia tèrmica (TES) mitjançant la utilització de materials de canvi de fase (PCM) per aplicacions a baixa temperatura, en particular, per a congeladors comercials. Es provarà tant experimental com numèricament la millora de les condicions de l’emmagatzematge i també la millora de la qualitat dels aliments emmagatzemats/transportats. També inclou la investigació de nous PCMs, estudiant la modificació de la temperatura de canvi de fase i analitzant velocitats de degradació i corrosió amb els materia

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12

Ranjith, Adam. "Thermal Energy Storage System Construction." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264530.

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In the framework of 2020 PUPM HEAT project three different types of thermal energy storage (TES) systems are being constructed and analyzed at a demonstration site set up at the power plant IREN in Moncalieri, Italy. KTH will assist this project by setting up a validation rig where three TES systems in smaller dimensions will be constructed and analyzed for its performance, to use as guideline for the demonstration site rig. The first TES system that is being constructed is the submerged parallel spiral heat exchanger which is a completely new version of latent heat storage to be tested. For t

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Saffari, Tabalvandani Mohammad. "Simulation-based optimization of thermal energy storage (TES) materials for building and industry applications." Doctoral thesis, Universitat de Lleida, 2017. http://hdl.handle.net/10803/459304.

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Una quantitat substancial d'energia s'utilitza en els sectors de l'edificació i de la indústria per als propòsits de la calefacció i de la refrigeració. Els materials d'emmagatzematge d'energia tèrmica (TES) poden oferir importants beneficis energètics i econòmics als edificis residencials, comercials i industrials. Els materials de TES tenen el potencial per reduir les demandes de refredament i de l'electricitat màxima en sectors de l'edificació i de la indústria; però, per tal d'implementar adequadament aquesta tecnologia per maximitzar els beneficis econòmics, es necessiten tècniques de si

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Raud, Ralf. "Optimized salt selection for solar thermal latent heat energy storage." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/116429/1/Ralf_Raud_Thesis.pdf.

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This thesis contributes to the state of the art of Concentrating Solar Thermal by rigorously examining the selection process for the thermal storage medium. An optimized process is developed and then applied to the local constraints to optimize the technoeconomic performance of the storage media for the ongoing Australian Solar Thermal Research Initiative.

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Hedkvist, Måns. "Expansion av Fjärrvärmeproduktion ur ett Ekonomiskt Perspektiv : En Numeriskt Modellerad Fallstudie." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-183869.

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Fjärrvärme i dagens Sverige är ett väletablerat sätt att leverera värme för både industriell och privat användning. Med nästa generations fjärrvärmesystem vid horisonten kan förändringar av existerande fjärrvärmenät komma att bli vanligt förekommande. Trots att det inte är fullt aktuellt med den typen av renoveringar ännu så måste fjärrvärmenät ibland byggas ut för att hantera nya situationer som kan uppstå. För att få en god uppskattning om vad de nya situationerna kommer kräva, och potentiellt kosta, så är simuleringsmodeller ett användbart verktyg. Den här studien har granskat en kommande ö

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Ferrer, Muñoz Gerard. "Characterization, equation formulation and enhancement of phase change materials (PCM) for thermal energy storage (TES)." Doctoral thesis, Universitat de Lleida, 2016. http://hdl.handle.net/10803/399901.

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L’edificació, la indústria i el transport són els tres principals sectors consumidors d’energia, representant el 96 % de l’energia final consumida a la Unió Europea, i essent responsable de gairebé la totalitat de les emissions de CO2. El programa Horizon 2020 de la Comissió Europea expressa la necessitat de reduir el consum d’energia i les emissions d’efecte hivernacle en un 20 % per l’any 2020. L’emmagatzematge d’energia és un dels principals camps considerats i desenvolupats per reduir les emissions, doncs permet emparellar la demanda i el subministrament d’energia amb sistemes simples i ef

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Barreneche, Güerisoli Camila. "Development and characterization of new materials incorporating phase change materials (PCM) for thermal energy storage (TES) applications in buildings." Doctoral thesis, Universitat de Lleida, 2013. http://hdl.handle.net/10803/123749.

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Actualment, la demanda d'energia per satisfer el confort tèrmic en edificació és un dels majors reptes per a les administracions. Per tant, l'eficiència dels diferents sistemes d'emmagatzematge d'energia s està investigant intensament per la comunitat científica. Una alternativa viable és l'ús de materials de canvi de fase (PCM). Les parafines han estat molt utilitzades com PCM per la seva alta capacitat d'emmagatzematge de calor (al voltant de 100-130 kJ·kg-1) i la seva baixa temperatura de fusió la qual és molt estable. A més, el consum

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Rossi, Espagnet Alberto. "Techno-Economic Assessment of Thermal Energy Storage integration into Low Temperature District Heating Networks." Thesis, KTH, Energiteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-191485.

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Thermal energy storage (TES) systems are technologies with the potential to enhance the efficiency and the flexibility of the coming 4th generation low temperature district heating (LTDH). Their integration would enable the creation of smarter, more efficient networks, benefiting both the utilities and the end consumers. This study aims at developing a comparative assessment of TES systems, both latent and sensible heat based. First, a techno-economic analysis of several TES systems is conducted to evaluate their suitability to be integrated into LTDH. Then, potential scenarios of TES integrat

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Glos, Jan. "Modelování a řízení toků elektrické a tepelné energie v plně elektrických automobilech." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-433039.

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Systematické řízení tepelných a elektrických toků v plně elektrických automobilech se stává velmi důležitým, protože v těchto typech automobilů není k dispozici dostatek odpadního tepla pro vytápění kabiny. Aby v zimním období nedocházelo ke snížení dojezdu, je nutné použití technologií, které umožní snížení spotřeby energie nutné k vytápění kabiny (např. tepelné čerpadlo, zásobník tepla). Je také zapotřebí vytvořit řídicí algoritmy pro tato zařízení, aby byl zajištěn jejich optimální provoz. V letním období je nezbytné řídit tepelné toky v rámci elektromobilu tak, aby nedocházelo k nadměrnému

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Hinke, Themba D. "Hot thermal storage in a variable power, renewable energy system." Thesis, Monterey, California: Naval Postgraduate School, 2014. http://hdl.handle.net/10945/42645.

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Approved for public release; distribution is unlimited<br>This thesis outlines the design of a renewable energy heat generation system with thermal storage for DOD facilities. The DOD is seeking to implement an increased percentage of renewable energy systems at its facilities in order to improve energy security and reduce energy costs. The intermittent nature of renewable energy generation, however, presents a major challenge to full implementation. This shortfall can be overcome by targeted facility-scale energy storage that allows for increased use of renewable-only systems. Since a large p

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Maidadi, Mohaman Bello. "Packed-bed rock thermal energy storage for concetrated solar power: enhancement of storage time and system efficiency." Thesis, Nelson Mandela Metropolitan University, 2013. http://hdl.handle.net/10948/d1020914.

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Solar thermal energy harvesting is a promising solution to offset the electricity demands of a growing population. The use of the technology is however still limited and this can most likely be attributed to the capital cost and also the intermittent nature of solar energy which requires incorporation of a storage system. To make the technology more attractive and effective, cheap means of harvesting solar energy and the development of efficient and inexpensive thermal energy storage devices will improve the performance of solar energy systems and the widespread use of solar energy. Heat stora

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Niaparast, Shervin. "ENERGY ANALYSIS OF A SOLAR BLIND CONCEPT INTEGRATED WITH ENERGY STORAGE SYSTEM." Thesis, KTH, Kraft- och värmeteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-131419.

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The use of an attached sunspace is one of the most popular passive solar heating techniques. One of the main drawbacks of the sunspace is getting over heated by the sun energy during the hot season of the year. Even in northern climates overheating could be problematic and there is a considerable cooling demand. Shading is one of the most efficient and cost effective strategies to avoid overheating due to the high irradiation especially in the summer. Another strategy is using ventilation system to remove the excess heat inside the sunspace. However this rejected energy can be captured and sto

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Zhou, Zexing. "Engineering design of thermochemical energy storage system to provide hot water suitable for membrane distillation operation." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/208079/1/Zexing_Zhou_Thesis.pdf.

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This thesis used Computational Fluid Dynamic Software Ansys Fluent to evaluate the design of a Zeolite 13X based Thermochemical Energy Storage System. The system is designed to provide constant hot water supply during night-time for a solar Membrane Distillation (MD) system. It overcomes the intermittent nature of solar energy to provide a sustainable energy solution for mining water treatment in Australia. The utilization of CFD also proposed a method to predict the performance of a designed TES which estimated the critical configurations such as optimal charging/discharging flow rate, temper

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Ghashami, Bahman. "A New Power Storage, Cooling Storage, and Water Production Combined Cycle (PCWCC)." Thesis, Högskolan i Gävle, Energisystem, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-22725.

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Fresh water shortage and hot weather are common challenges in many countries of the world. In the other hand, the air conditioning systems which are used for indoor cooling cause peak electricity demand during high temperatures hours. This peak hour demand is very important since it is more expensive and mainly is supplied by fossil fuel power plants with lower efficiencies compare to base load fossil fuel or renewable owe plants. Moreover, these peak electricity load fossil fuel power plants cause higher green house gas emission and other environmental effects. So, all these show that any sol

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Xiang, Yetao. "Experimental and computational investigation of building integrated PV thermal air system combined with thermal storage." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/42743/.

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Issues from global warming with increased CO2 emissions have been to a main concern over world. As an example in the UK, the energy demand in the domestic sector has risen by 17% in 2010 compared with that of 1970. Applying renewable energy is widely agreed to be the most effective and promising way to solve the problem where solar energy and photovoltaic technology have been greatly developing from the last century. Photovoltaic combines with Phase Change Material (PV/PCM) system is a hybrid solar system which uses phase change material to reduce the PV temperature and to store energy for oth

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Tabassum, Tonny. "A numerical study of a double pipe latent heat thermal energy storage system." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=87015.

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Solar energy is an intermittent supply source of energy. To efficiently utilize this free renewable energy source some form of thermal energy storage devices are necessary. Phase change materials (PCMs), because of their high energy density storage capacity and near isothermal phase change characteristics, have proven to be promising candidates for latent heat thermal energy storage (LHTES) devices. Among the various LHTES devices for low temperature residential heating and cooling applications, the shell-and-tube type heat exchanging devices are the most simple to operate and can be easily f

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Garay, Rosas Ludwin. "System Simulation of Thermal Energy Storage involved Energy Transfer model in Utilizing Waste heat in District Heating system Application." Thesis, KTH, Kraft- och värmeteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-161726.

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Nowadays continuous increase of energy consumption increases the importance of replacing fossil fuels with renewable energy sources so the CO2 emissions can be reduced. To use the energy in a more efficient way is also favorable for this purpose. Thermal Energy Storage (TES) is a technology that can make use of waste heat, which means that it can help energy systems to reduce the CO2 emissions and improve the overall efficiency. In this technology an appropriate material is chosen to store the thermal energy so it can be stored for later use. The energy can be stored as sensible heat and laten

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Navarro, Farré Lidia. "Thermal energy storage in buildings through phase change materials (PCM) incorporation for heating and cooling purposes." Doctoral thesis, Universitat de Lleida, 2016. http://hdl.handle.net/10803/398840.

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La reducció del consum energètic dels sistemes de calefacció i refrigeració dels edificis és un repte fonamental per assolir els objectius marcats per l’Horitzó 2020. Noves aplicacions d'emmagatzematge d'energia tèrmica en edificis es mostren prometedores per reduir aquest elevat consum energètic. Un dels objectius d'aquesta tesi doctoral és revisar les aplicacions passives i actives d'emmagatzematge d'energia que es troben en la literatura, especialment aquelles que utilitzen materials de canvi de fase (PCM). En aplicacions passives els requeriments de confort i les condicions climàtiqu

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Wong, Kin-chuen, and 黃健全. "Optimization of building cooling system based on genetic algorithms and thermal energy storage." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B45701416.

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Kota, Krishna. "DESIGN AND EXPERIMENTAL STUDY OF AN INTEGRATED VAPOR CHAMBER – THERMAL ENERGY STORAGE SYSTEM." Doctoral diss., University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2816.

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Future defense, aerospace and automotive technologies involve electronic systems that release high pulsed waste heat like during high power microwave and laser diode applications in tactical and combat aircraft, and electrical and electronic systems in hybrid electric vehicles, which will require the development of an efficient thermal management system. A key design issue is the need for fast charging so as not to overheat the key components. The goal of this work is to study the fabrication and technology implementation feasibility of a novel high energy storage, high heat flux passive heat

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Kota, Krishna M. "Design and experimental study of an integrated vapor chamber thermal energy storage system." Orlando, Fla. : University of Central Florida, 2008. http://purl.fcla.edu/fcla/etd/CFE0002332.

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Hallqvist, Karl. "Högtempererat borrhålslager för fjärrvärme." Thesis, Uppsala universitet, Naturresurser och hållbar utveckling, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-231586.

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The district heating load is seasonally dependent, with a low load during periods of high ambient temperature. Thermal energy storage (TES) has the potential to shift heating loads from winter to summer, thus reducing cost and environmental impact of District Heat production. In this study, a concept of high temperature borehole thermal energy storage (HT-BTES) together with a pellet heating plant for temperature boost, is presented and evaluated by its technical limitations, its ability to supply heat, its function within the district heating system, as well as its environmental impact and ec

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Miró, Laia. "Industrial waste heat: mapping, estimations and recovery by means of TES." Doctoral thesis, Universitat de Lleida, 2016. http://hdl.handle.net/10803/399633.

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En l’actual context energètic, l'ús de la calor residual industrial (CRI) representa una oportunitat atractiva de substituir el consum d'energia primària per un mitjà amb baix nivell d'emissions i baix cost. Aquesta calor es pot recuperar i reutilitzar en altres processos, ser transformada en electricitat o calor.Tot i el seu prometedor potencial, aquest CRI no s’utilitza. L'objectiu d'aquesta tesi doctoral és el de superar algunes de les barreres tecnològiques i d'informació actuals que dificulten l’ús d’aquesta fot d’energia. En primer lloc, s’ha identificat el potencial mundial actual de CR

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Naser, Mohammad Yousef Mousa. "Computer Modeling of Solar Thermal System with Underground Storage Tank for Space Heating." Wright State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=wright1620875130064807.

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Lindberg, Fanny. "Performance Improvement from Single to Multi Latent Thermal Energy Storage System combined Water Heater." Thesis, KTH, Energiteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170897.

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In numerous energy systems there are discrepancies between the energy supply and demand. One such system is domestic water heater. The hot water heater is a sensible heat storage where the thermal energy is stored through change in temperature. The sensible heat storage has the disadvantage of high losses and low energy density. An alternative to the sensible heat storage is the latent heat storage. The latent heat storage stores energy through phase change and exhibits high energy density. This method of storing energy is consequently more compact. Furthermore the latent heat storage can be c

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Williams, Daniel David. "Cold side thermal energy storage system for improved operation of air cooled power plants." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/78194.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 81-82).<br>Air cooled power plants experience significant performance fluctuations as plant cooling capacity reduces due to higher daytime temperature than nighttime temperature. The purpose of this thesis is to simulate the detailed operation of a cold side thermal energy storage system in order to evaluate its potential. An organic Rankine cycle geothermal power station is used as an example application. Detailed sizi

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Fanny, Lindberg. "Performance Improvement from Single to Multi Latent Thermal Energy Storage System combined Water Heater." Thesis, KTH, Energiteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175329.

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In numerous energy systems there are discrepancies between the energy supply and demand. One such system is domestic water heater. The hot water heater is a sensible heat storage where the thermal energy is stored through change in temperature. The sensible heat storage has the disadvantage of high losses and low energy density. An alternative to the sensible heat storage is the latent heat storage. The latent heat storage stores energy through phase change and exhibits high energy density. This method of storing energy is consequently more compact. Furthermore the latent heat storage can be c

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Louw, Andre Du Randt. "Discrete and porous computational fluid dynamics modelling of an air-rock bed thermal energy storage system." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86233.

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Thesis (MScEng)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Concentrating solar power promises to be a potential solution for meeting the worlds energy needs in the future. One of the key features of this type of renewable energy technology is its ability to store energy effectively and relatively cheaply. An air-rock bed thermal energy storage system promises to be an effective and reasonably inexpensive storage system for concentrating solar power plants. Currently there is no such storage system commercially in operation in any concentrating solar power plant, and further res

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Myska, Martin. "Possibilities with Stirling Engine and High Temperature Thermal Energy Storage in Multi-Energy Carrier System : An analysis of key factors influencing techno-economic perspective of Stirling engine and high-temperature thermal energy storage." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-53407.

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Small and medium-scale companies are trying to minimise their carbon footprint and improve their cash flow, renewable installations are increasing all over the Europe and are expected to do so in following years. However, their dependency on the weather cause pressure on matching the production with demand. An option how to challenge this problem is by using energy storage. The aim of this project is to determine techno-economic benefits of Stirling engine and high temperature thermal energy storage for installation in energy user system and identify key factors that affect the operation of su

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Olsen, Lindsay M. "Initial investigation of a novel thermal storage concept as part of a renewable energy system." Monterey, California: Naval Postgraduate School, 2013. http://hdl.handle.net/10945/34716.

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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, it may not be copyrighted.<br>Approved for public release; distribution is unlimited<br>This thesis forms part of a larger study that aims to develop a renewable energy demonstration plant at the Naval Postgraduate School Turbopropulsion Laboratory. The architecture and design approach of the demonstration plant is outlined in this thesis. While all the components of the system are

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Hampus, Randén. "Performance improvement from single to multi phase change materials in a thermal energy storage system." Thesis, KTH, Energiteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175153.

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Phase change materials are used in many applications to work as thermal energy storage systems. One way to transfer the heat is by letting water flow through a finned pipe submerged in i tank filled with PCMs. This model is analyzed with a finite element difference based numerical software. The power ratio between using single-PCM and multi-PCMs is compared. The hypothesis was that a multi-PCM configuration is more efficient than a single. The results show that a multi-PCM configuration is more efficient than a single-PCM configuration. It however also indicates that it is of great importance

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Hasib, A. M. M. Golam. "Effect of Dispersed Particles and Branching on the Performance of a Medium Temperature Thermal Energy Storage System." Thesis, University of North Texas, 2013. https://digital.library.unt.edu/ark:/67531/metadc499995/.

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The main objective of my thesis is to develop a numerical model for small-scale thermal energy storage system and to see the effect of dispersing nano-particles and using fractal-like branching heat exchanger in phase change material for our proposed thermal energy storage system. The associated research problems investigated for phase change material (PCM) are the low thermal conductivity and low rate of heat transfer from heat transfer fluid to PCM in thermal energy storage system. In this study an intensive study is carried out to find the best material for thermal storage and later on as a

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Boampong, James Kwadwo. "Solar thermal heating of a glasshouse using phase change material (PCM) thermal storage techniques." Thesis, Brunel University, 2015. http://bura.brunel.ac.uk/handle/2438/12863.

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The Royal Botanic Gardens (RGB) is used as an umbrella name for the institution that runs Kew and Wakehurst Place gardens in Sussex The RBG has a large number of glasshouses at Kew and Wakehurst sites that consume lots of heating energy which is a major concern and the group is looking for an alternative heating system that will be more efficient and sustainable to save energy, cost and reduce CO2 emissions. Glasshouse due to greenhouse effect trap solar energy in the space with the slightest solar gains but the energy trapped in the space most often is vented through the roof wasted to keep t

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Ximenes, Naves Alex. "Whole Life Sustainability Assessment at the Building Industry and Constructed Assets, through the Whole Life Costing Assessment and Life Cycle Costing Assessment evaluating the economic and financial aspects." Doctoral thesis, Universitat Rovira i Virgili, 2019. http://hdl.handle.net/10803/670202.

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Els edificis d’energia neta poden ser entesos com a edificis, que durant un temps determinat generen tanta energia com consumeixen. Ja sigui des del punt de vista de l’oferta o el consum, la disponibilitat d’energia està relacionada amb alguns aspectes bàsics, com ara la font (s), la conversió, la distribució, l’ús, el malbaratament, l’optimització, l’eficiència i l’autonomia. Aquests temes revelen la complexitat del tema de l'energia i justifiquen l'atenció especial que li dóna la comunitat acadèmica. Per obtenir resultats tangibles en l'anàlisi d'aquests sistemes, en el nostre estudi en

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Barrios, Rivero Matías. "EVALUATION OF AN AQUIFER THERMAL ENERGY STORAGE (ATES) SYSTEM FOR THE CITY HOSPITAL IN KARLSRUHE (GERMANY)." Thesis, Karlsruhe Institute of Technology (KIT), Institute of Applied Geosciences (AGW), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-267554.

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The objective of the present study is to evaluate the economic, technical and environmental feasibility of an Aquifer Thermal Energy Storage (ATES) system combined with groundwater heat pumps (GWHP) for providing space cooling and heating for the future surgery building at the city hospital in Karlsruhe. The base case system used as reference for comparison is a system similar to the one currently supplying space cooling from a GWHP system and space heating by the local district-heating network. In addition, two alternative systems were included in the analysis, an Absorption Chiller (AbC) and

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MAHMOOD, MARIAM. "Study of Hybrid Solar Gas Turbine System: T100 Modeling and Dynamic Analysis of Thermal Energy Storage." Doctoral thesis, Università degli studi di Genova, 2018. http://hdl.handle.net/11567/930643.

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Concentrated Solar Power (CSP) hybrid gas turbine systems particularly based on the micro Gas Turbines (mGT) will be of great importance in future power infrastructure where energy security, economic feasibility and clean and efficient power generation are the key concerns. Integration of Thermal Energy Storage (TES) in CSP hybrid gas turbine systems could be a viable solution to overcome the intermittent nature of solar power, and increase the dispatchability. Based on this perception, a comprehensive analysis of both mGT cycle and TES technology should be undertaken, in order to achieve a be

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Muhammad, Mubarak Danladi. "Development of a cascaded latent heat storage system for parabolic trough solar thermal power generation." Thesis, Cranfield University, 2014. http://dspace.lib.cranfield.ac.uk/handle/1826/9303.

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Concentrated solar power (CSP) has the potential of fulfilling the world’s electricity needs. Parabolic-trough system using synthetic oil as the HTF with operating temperature between 300 and 400o C, is the most matured CSP technology. A thermal storage system is required for the stable and cost effective operation of CSP plants. The current storage technology is the indirect two-tank system which is expensive and has high energy consumption due to the need to prevent the storage material from freezing. Latent heat storage (LHS) systems offer higher storage density translating into smaller sto

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Souza, Luís Manoel de Paiva [UNESP]. "Levantamento de coeficientes de desempenho de armazenador térmico associado a refrigerador doméstico modificado." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/91720.

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Made available in DSpace on 2014-06-11T19:25:27Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-06-27Bitstream added on 2014-06-13T19:32:34Z : No. of bitstreams: 1 souza_lmp_me_bauru.pdf: 1572366 bytes, checksum: b4f3b5bc0ddb17fad3e39f5f59ec6a72 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>No estudo de reaproveitamento de energia térmica, os refrigeradores domésticos dissipam calor para o meio ambiente, através do seu condensador, e esse calor pode ser reciclado, ou seja, recuperado através de escoamento de água, como fluido refrigerante escoando pel

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Maxamhud, Mahamed, and Arkam Shanshal. "SELF-SUFFICIENT OFF-GRID ENERGY SYSTEM FOR A ROWHOUSE USING PHOTOVOLTAIC PANELS COMBINED WITH HYDROGEN SYSTEM : Master thesis in energy system." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-49379.

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It is known that Sweden is categorised by being one of the regions that experience low solar radiation because it is located in the northern hemisphere that has a low potential of solar radiation during the colder seasons. The government of Sweden aim to promote a more sustainable future by applying more renewable initiative in the energy sector. One of the initiatives is by applying more renewable energy where PV panels will play a greater role in our society and in the energy sector. However, the produced energy from the PV panels is unpredictable due to changes in radiation throughout the d

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Leppin, Lorenz. "Development of Operational Strategies for a Heating Pump System with Photovoltaic, Electrical and Thermal Storage." Thesis, Högskolan Dalarna, Energiteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:du-27304.

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This study describes the development of operational strategies for an exhaust air heat pump system that supplies space heating and domestic hot water. The system combines photovoltaic power production with two different storage types. These are electrical storage using batteries and thermal storage in using a domestic hot water tank and in form of the thermal capacity of the building. The investigation of the control strategies is carried out for a detailed single family house model in Sweden in the simulation software TRNSYS. The overall aim of the control strategies is to improve the perform

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