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TECHNICAL PAPERS

Modeling and Experimental Evaluation of Passive Heat Sinks for Miniature High-Flux Photovoltaic Concentrators

[+] Author and Article Information
Jian Sun, T. Agami Reddy

Department of Civil, Architectural and Environmental Engineering, Drexel University, Philadelphia, PA

Tomer Israeli

Department of Mechanical Engineering Ben-Gurion University of the Negev, Beer Sheva 84105, Israel

Kevin Scoles

Department of Electrical and Computer Engineering, Drexel University, Philadelphia, PA

Jeffrey M. Gordon

Department of Solar Energy and Environmental Physics Jacob Blaustein Institute for Desert Research Ben-Gurion University of the Negev, Sede Boqer Campus 84990, IsraelThe Pearlstone Center for Aeronautical Engineering Studies Department of Mechanical Engineering Ben-Gurion University of the Negev, Beersheva 84105, Israel

Daniel Feuermann

Department of Solar Energy and Environmental Physics Jacob Blaustein Institute for Desert Research Ben-Gurion University of the Negev Sede Boqer Campus 84990, Israel

J. Sol. Energy Eng 127(1), 138-145 (Feb 07, 2005) (8 pages) doi:10.1115/1.1785799 History: Received April 27, 2004; Revised May 04, 2004; Online February 07, 2005
Copyright © 2005 by American Institute of Physics
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References

Figures

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Sketch of the solar mini-dish 123
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Performance curve of the 3-junction GaInP2/GaAs/Ge Spectrolab cell 5
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Sketch of the assembly consisting of solar cell, mounting plate, and heat sink (not to scale)
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Thermal resistance network showing various resistances and temperatures. Rfin is the equivalent thermal resistance of the heat sink calculated by Eq. (A11).
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The heat sink with fiber-optic delivery of concentrated sunlight inside the laboratory. Also visible are the Ophir power meter and the data acquisition system.
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Temperature distribution of three different heat sink geometries for a specified volume of 25 cm3 assuming an ambient temperature of 25°C and wind velocity of 5 m/s. (d-diameter, t-thickness)
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Sensitivity of optimized geometry of heat sink to wind velocity for two different heat sink volumes
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Sensitivity of temperature difference between solar cell and ambient temperature for contact thermal conductivity between solar cell and mounting plate
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Sensitivity of temperature difference between solar cell and ambient temperature for contact thermal conductivity between mounting plate and heat sink
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Variation of solar cell temperature increase under open-circuit operation (i.e., stagnation condition) with heat sink volume under two different wind conditions. Beam irradiation of 1 kW/m2 has been assumed. The ambient temperatures have been varied from 10°C to 40°C while generating the above figure.

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