Solar cooling with concentrating photovoltaic/thermal (CPVT) systems

Mittelman, Gur; Kribus, Abraham; Dayan, Abraham

doi:10.1016/j.enconman.2007.04.004

Cited by 254 publications

(128 citation statements)

References 15 publications

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“…Basically, they are simple PVT collectors placed in the focus of some reflectors (Fresnel, parabolic, dish, etc.) [1,2,9,14]. Obviously, the specific cost of this system is dramatically lower than the flat plate PVT one; this is due to the lower amount of PV employed per unit area.…”

Section: Introductionmentioning

confidence: 98%

“…Conversely, for high concentration ratios, the PVT operating temperature and the corresponding inefficiencies may significantly increase (for silicon cells, the voltage drops to zero at 270 °C) [4]. Therefore, the use of CPVT may be improved adopting novel PV materials, such as multi-junction solar cells which can approach a nominal efficiency of 40% [14,15]. The adoption of such materials in CPVT may lead to a system operating up to 240 °C at reasonable conversion efficiency (slightly lower than 20%) [14].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the use of CPVT may be improved adopting novel PV materials, such as multi-junction solar cells which can approach a nominal efficiency of 40% [14,15]. The adoption of such materials in CPVT may lead to a system operating up to 240 °C at reasonable conversion efficiency (slightly lower than 20%) [14]. The perspective of using high temperature PVT is very interesting since it extends the number of possible applications.…”

Section: Introductionmentioning

confidence: 99%

“…The perspective of using high temperature PVT is very interesting since it extends the number of possible applications. An example consists in the use of the high-temperature heat provided by the PVT to drive heat engines (Stirling engines [16] or an Organic Rankine Cycle, ORC [17]) or a Solar Heating and Cooling system [14].…”

Section: Introductionmentioning

confidence: 99%

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Parabolic Trough Photovoltaic/Thermal Collectors: Design and Simulation Model

Calise

Vanoli

2012

Energies

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This paper presents a design procedure and a simulation model of a novel concentrating PVT collector. The layout of the PVT system under investigation was derived from a prototype recently presented in literature and commercially available. The prototype consisted in a parabolic trough concentrator and a linear triangular receiver. In that prototype, the bottom surfaces of the receiver are equipped with mono-crystalline silicon cells whereas the top surface is covered by an absorbing surface. The aperture area of the parabola was covered by a glass in order to improve the thermal efficiency of the system. In the modified version of the collector considered in this paper, two changes are implemented: the cover glass was eliminated and the mono-crystalline silicon cells were replaced by triple-junction cells. In order to analyze PVT performance, a detailed mathematical model was implemented. This model is based on zero-dimensional energy balances. The simulation model calculates the temperatures of the main components of the system and the main energy flows Results showed that the performance of the system is excellent even when the fluid temperature is very high (>100 °C). Conversely, both electrical and thermal efficiencies dramatically decrease when the incident beam radiation decreases.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Parabolic Trough Photovoltaic/Thermal Collectors: Design and Simulation Model

Calise

Vanoli

2012

Energies

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“…The first category corresponds to concentrated PV-T collector, with either high concentration factor [2][3] or lower concentration factor [4][5][6].…”

Section: Classification Of Pv-t Collectorsmentioning

confidence: 99%

Measurements and Benchmark of PVT – Collectors According To EN 12975 and Development of a Standardized Measurement Procedure

Hofmann

Dupeyrat

Krämer³

et al. 2010

Proceedings of the EuroSun 2010 Conference

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SynopsisHybrid Photovoltaic-thermal-collectors (PV-T) may have a number of advantages compared to stand-alone PV or solar-thermal-collectors. To mention one of them for example the overall efficiency of a PV-T-system is higher than the efficiency of the individual systems [1]. Recently, there have been efforts by the "European Solar Keymark Network" and also in national organizations to standardize PV-T collector measurements and make it possible to assign a "Solar Keymark". That would be a great benefit for PV-T collectors and subsidiary for a successful implementation in the market.Fraunhofer ISE runs an accredited laboratory for solar thermal components (TestLab Solar Thermal Systems) and also an accredited test centre for PV modules (TestLab PV Modules) and is able to combine both strengths to measure uncovered PV-T collectors and covered PV-T collectors properly. Based on the testing facilities for solar air-collectors, PV-T air-collectors can be tested as well. Recently even Concentrated PV-T collectors are in the process of getting characterised. By testing several PV-T collectors Fraunhofer ISE has created special know-how for measuring different PV-T collectors and developed an automated procedure for efficiency tests.In this paper, the interest in the standardization of measurements of a PV-T collector is discussed, and different measurement procedures are shown. It illustrates possible testing methods for different collectors, testing procedures and results from tests already performed.

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Solar radiation transfer and performance analysis for a low concentrating photovoltaic/thermal system

Zhao

Wang

et al. 2015

Env Prog and Sustain Energy

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In this study, we investigated a concentrating solar photovoltaic/thermal system that uses solar radiation in the visible and infrared ranges separately. In this system, photoelectric and photothermal conversions are achieved independently via the thermal unit and the photovoltaic (PV) module, respectively. The operation of the thermal unit is not affected by temperature limitations imposed by the PV module. The results indicate that water as the working fluid in the thermal unit directly absorbs 33% of the solar radiation. When the mass flow rate was reduced, the water temperature at the thermal unit outlet increased; however, both the temperature and the electrical efficiency of the solar cell remained constant. When the solar radiation increased from 640 to 3200 W/m2, the concentrating photovoltaic/thermal (CPV/T) system produced high‐grade heat with an only 1.4% drop in electrical efficiency. Moreover, the exergetic efficiency of the CPV/T system increased with increasing incident solar irradiance. © 2015 American Institute of Chemical Engineers Environ Prog, 35: 263–270, 2016

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Solar cooling with concentrating photovoltaic/thermal (CPVT) systems

Cited by 254 publications

References 15 publications

Parabolic Trough Photovoltaic/Thermal Collectors: Design and Simulation Model

Parabolic Trough Photovoltaic/Thermal Collectors: Design and Simulation Model

Measurements and Benchmark of PVT – Collectors According To EN 12975 and Development of a Standardized Measurement Procedure

Solar radiation transfer and performance analysis for a low concentrating photovoltaic/thermal system

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