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Dissertations / Theses on the topic 'Collector thermal efficiency'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Šumić, Mersiha. "Thermal Performance of a Solarus CPC-Thermal Collector." Thesis, Högskolan Dalarna, Energi och miljöteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:du-14526.

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The aim of this master thesis is an investigation of the thermal performance of a thermal compound parabolic concentrating (CPC) collector from Solarus. The collector consists of two troughs with absorbers which are coated with different types of paint with unknown properties. The lower and upper trough of the collector have been tested individually. In order to accomplish the performance of the two collectors, a thorough literature study in the fields of CPC technology, various test methods, test standards for solar thermal collectors as

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2

Nordlander, Svante. "Load Adapted Solar Thermal Combisystems - Optical Analysis and Systems Optimization." Licentiate thesis, Högskolan Dalarna, Miljöteknik, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:du-1020.

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In a northern European climate a typical solar combisystem for a single family house normally saves between 10 and 30 % of the auxiliary energy needed for space heating and domestic water heating. It is considered uneconomical to dimension systems for higher energy savings. Overheating problems may also occur. One way of avoiding these problems is to use a collector that is designed so that it has a low optical efficiency in summer, when the solar elevation is high and the load is small, and a high optical efficiency in early spring and late fall when the solar elevation is low and the load is

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3

Aldubyan, Mohammad Hasan. "Thermo-Economic Study of Hybrid Photovoltaic-Thermal (PVT) Solar Collectors Combined with Borehole Thermal Energy Storage Systems." University of Dayton / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1493243575479443.

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4

Ancines, Crissiane Alves. "Comparação entre o desempenho de um coletor híbrido térmico fotovoltaico com o de um coletor plano e um módulo fotovoltaico convencional." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/149352.

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Os aproveitamentos de energia solar em aplicações térmicas ou para a produção de energia elétrica são cada vez mais importantes, por se tratarem de fontes de energia. Os estudos acerca dessas fontes estão se intensificando, a fim de melhorar seus desempenhos e suas aplicações para as condições atuais de desenvolvimento pelo mundo. Uma dessas tecnologias que utilizam como fonte a energia solar, desenvolvida nos últimos 30 anos, é o coletor híbrido térmico fotovoltaico. Esse coletor converte a energia proveniente da radiação solar em energia térmica e elétrica, simultaneamente, com a superposiçã

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5

Marchesini, Camilla. "Modelling and Verification of a Correction Factor to Evaluate the Efficiency of Solar Thermal Collectors with the Rapid Test Method." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11741/.

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A new method for the evaluation of the efficiency of parabolic trough collectors, called Rapid Test Method, is investigated at the Solar Institut Jülich. The basic concept is to carry out measurements under stagnation conditions. This allows a fast and inexpensive process due to the fact that no working fluid is required. With this approach, the temperature reached by the inner wall of the receiver is assumed to be the stagnation temperature and hence the average temperature inside the collector. This leads to a systematic error which can be rectified through the introduction of a correction f

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6

Moummi, Abdelhafid. "Etude globale et locale du rôle de la géométrie dans l'optimisation des capteurs solaires plans à air." Valenciennes, 1994. https://ged.uphf.fr/nuxeo/site/esupversions/3e717f2f-e09a-4b1a-af50-e618b869f5dc.

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Les capteurs solaires plans à air, présentent de faibles performances thermiques comparativement aux capteurs à liquides. Cet inconvénient est dû aux faibles propriétés thermophysiques de l'air. Pour accroitre ces performances, on doit créer des écoulements turbulents très développés. Cela permet d'améliorer nettement l'échange thermique et par conséquent les performances des capteurs. Ces écoulements turbulents sont obtenus en garnissant le conduit de l'insolateur par des obstacles les chicanes de formes diverses et variées, réalisées en tôles d'aluminium d'épaisseur 0,4 mm. C'est ainsi qu'un

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7

Silva, Daniel dos Santos. "Desenvolvimento de uma ferramenta computacional para dimensionamento de coletores solares de placa plana." Universidade do Vale do Rio dos Sinos, 2012. http://www.repositorio.jesuita.org.br/handle/UNISINOS/4315.

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Submitted by Maicon Juliano Schmidt (maicons) on 2015-07-08T14:09:52Z No. of bitstreams: 1 Daniel dos Santos Silva.pdf: 1207479 bytes, checksum: a37801e7a4a9fabd110fb80d5c179a85 (MD5)<br>Made available in DSpace on 2015-07-08T14:09:52Z (GMT). No. of bitstreams: 1 Daniel dos Santos Silva.pdf: 1207479 bytes, checksum: a37801e7a4a9fabd110fb80d5c179a85 (MD5) Previous issue date: 2012-01-31<br>Nenhuma<br>O uso da energia solar, como alternativa energética renovável, tem tomado um destaque fundamental no cenário mundial. Em especial, esse tipo de energia utilizado para aquecimento de água, tan

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8

Козак, Дмитро Віталійович. "Теплотехнічні характеристики комбінованого сонячного колектора на основі алюмінієвих канавчатих теплових труб". Thesis, КПІ ім. Ігоря Сікорського, 2018. https://ela.kpi.ua/handle/123456789/25902.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.14.06 «Технічна теплофізика та промислова теплоенергетика». – Національний технічний університет України «Київський політехнічний інститут імені Ігоря Сікорського», Міністерство освіти і науки України, Київ, 2018. Робота присвячена підвищенню енергетичної ефективності та спрощенню інтеграції сонячних систем на основі комбінованих сонячних колекторів у фасади і дахи будівель за рахунок використання як елемента теплопоглинальної поверхні алюмінієвих канавчатих теплових труб. Встановлено, що на ефективність робо

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9

Lämmle, Manuel [Verfasser], and Hans-Martin [Akademischer Betreuer] Henning. "Thermal management of PVT collectors : : development and modelling of highly efficient glazed, flat plate PVT collectors with low emissivity coatings and overheating protection." Freiburg : Universität, 2018. http://d-nb.info/1168145651/34.

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10

Rizea, Steven Emanoel. "Optimization of Ocean Thermal Energy Conversion Power Plants." Master's thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5462.

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A proprietary Ocean Thermal Energy Conversion (OTEC) modeling tool, the Makai OTEC Thermodynamic and Economic Model (MOTEM), is leveraged to evaluate the accuracy of finite-time thermodynamic OTEC optimization methods. MOTEM is a full OTEC system simulator capable of evaluating the effects of variation in heat exchanger operating temperatures and seawater flow rates. The evaluation is based on a comparison of the net power output of an OTEC plant with a fixed configuration. Select optimization methods from the literature are shown to produce between 93% and 99% of the maximum possible amount o

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11

Kulkarni, Sachin. "EFFECT OF COMPOSITION, MORPHOLOGY AND SEMICONDUCTING PROPERTIES ON THE EFFICIENCY OF CUIN1-XGAXSE2-YSY THIN-FILM SOLAR CELLS PRE." Doctoral diss., University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2938.

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A rapid thermal processing (RTP) reactor for the preparation of graded CuIn1-xGaxSe2-ySy (CIGSeS) thin-film solar cells has been designed, assembled and is being used at the Photovoltaic Materials Laboratory of the Florida Solar Energy Center. CIGSeS films having the optimum composition, morphology, and semiconducting properties were prepared using RTP. Initially films having various Cu/(In+Ga) ratios were prepared. In the next step selenium incorporation in these films was optimized, followed by sulfur incorporation in the surface to increase the bandgap at the surface. The compositional grad

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12

Lin, Shao Hua. "Multi-Physics Model of Key Components In High Efficiency Vehicle Drive." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5971.

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Hybrid Electric Vehicles (HEVs) and Electric Vehicles (EVs) are crucial technologies for the automotive industry to meet society's demands for cleaner, more energy efficient transportation. Meeting the need to provide power which sustains HEVs and EVs is an immediate area of concern that research and development within the automotive community must address. Electric batteries and electrical motors are the key components in HEV and EV power generation and transmission, and their performance plays very important role in the overall performance of the modern high efficiency vehicles. Therefore, i

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13

Mouret, Guillaume. "Étude de la filtration des aérosols nanométriques." Thesis, Vandoeuvre-les-Nancy, INPL, 2008. http://www.theses.fr/2008INPL063N/document.

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Cette étude vise à une meilleure compréhension des phénomènes rencontrés en filtration des aérosols nanométriques, c’est-à-dire inférieurs à 100 nm, neutres et/ou chargés. Pour ce faire, trois différents types de média ont été étudiés : des grilles, en acier et matières synthétiques, des filtres non tissés, en fibres de verre ou polymériques, et des lits granulaires, constitués de billes d’acier ou de zéolithe. Il ressort des résultats expérimentaux obtenus que quel que soit le média testé, l’efficacité de collecte des particules augmente lorsque le diamètre de l’aérosol diminue, et ce jusque

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14

Choi, Sung In. "Smart Localized Heating Control System With Human Movement Tracking." Master's thesis, Temple University Libraries, 2016. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/407171.

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Electrical Engineering<br>M.S.E.E.<br>According to the U.S. energy consumption survey in 2012, about 25% of the commercial and 42% of the residential building energy were used for heating. Despite the development of new and more efficient Heating, Ventilation, and Air Conditioning (HVAC) systems over the years, the high energy consumption in heating is still one of the major energy efficiency issues. Studies showed that decreasing HVAC operating temperature set points by 4°F will result in energy savings of 15% or more. Thus, the smart localized heating control (SLHC) system was designed and p

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15

Chen, Yung-Chou, and 陳永洲. "Efficiency Optimization Design for Photovoltaic/Thermal (PVT) Air Collector." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/30729852426496867936.

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碩士<br>大葉大學<br>電機工程學系<br>102<br>This paper presents a new photovoltaic/thermal air collector. Using fin-type heat sink to be the substrate of photovoltaic module that increasing the cooling area and improving the cooling performance. Adding blower to increase the air flow and recover the waste heat in the same time. Using MATLAB/Simulink to design the model of new photovoltaic/thermal air collector. The ambient parameters are used to simulate the temperature, the photovoltaic efficiency and the thermal efficiency. Simulate results was found the average photovoltaic efficiency is 12.46%, the ave

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16

Chia-ChunChen and 陳佳群. "Study of Diffuse Correction on Thermal Efficiency of Flat Panel Solar Collector in Taiwan." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/7a3gaa.

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碩士<br>國立成功大學<br>航空太空工程學系碩士在職專班<br>106<br>Solar collector system is a very popular application of solar thermal energy nowadays. Currently in Taiwan, the flat plate collector is the most common energy conversion device in domestic solar water heater industry (approximately 93%). The current solar thermal energy collector testing standard in Taiwan was published by the Bureau of Standards and Inspections of the Ministry of Economic Affairs in 2008 as CNS 15165-1 [1]. This standard is based on ISO 9806:1994 [2], published by International Standards Organization ISO 1994 for solar thermal. The hea

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17

Carvalho, João Chaves. "Construção e Avaliação Térmica de um Coletor Solar." Master's thesis, 2013. http://hdl.handle.net/10316/99660.

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Dissertação de Mestrado em Engenharia do Ambiente apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra.<br>A necessidade de um crescente recurso às energias renováveis é incontornável. As energias renováveis são fontes limpas de energia. A sua utilização permite reduzir os impactes ambientais, produzindo menos desperdícios, e contribui para um desenvolvimento sustentável da sociedade atual e futura. A energia solar é a fonte mais abundante do nosso planeta e a fonte de todas as energias. As principais formas da energia solar são o calor e a luz. O aproveitamento da

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18

Lozano, Adolfo. "Analysis of a novel thermoelectric generator in the built environment." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-08-4131.

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This study centered on a novel thermoelectric generator (TEG) integrated into the built environment. Designed by Watts Thermoelectric LLC, the TEG is essentially a novel assembly of thermoelectric modules whose required temperature differential is supplied by hot and cold streams of water flowing through the TEG. Per its recommended operating conditions, the TEG nominally generates 83 Watts of electrical power. In its default configuration in the built environment, solar-thermal energy serves as the TEG’s hot stream source and geothermal energy serves as its cold stream source. Two systems-lev

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19

Mota, Raúl Alves. "Caracterização energética e estudo de medidas de melhoria para um Hotel nZEB." Master's thesis, 2015. http://hdl.handle.net/10316/38920.

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Dissertação de Mestrado Integrado em Engenharia Mecânica apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra.<br>No contexto atual em que a eficiência energética dos edifícios é um tópico de importância crescente, a caracterização adequada das formas de uso de energia nos hotéis é fundamental para se conseguir uma crescente utilização racional da energia. O conforto proporcionado pelas unidades hoteleiras é essencial para o seu desenvolvimento. Como tal, a hotelaria é um sector onde o uso da energia tem especial relevo nos custos totais da atividade. Neste contexto, a

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