Publication de 4 numéros par an
ISSN Imprimer: 2169-2785
ISSN En ligne: 2167-857X
Indexed in
TWO-PHASE COOLING OF CONCENTRATING PHOTOVOLTAIC CELLS
RÉSUMÉ
Experimental investigation of a heat sink for cooling of photovoltaic solar cells up to 2000 suns concentration was conducted. Flow boiling of refrigerant HFC-134a in a pin-fin microchannel was investigated in the range of mass flux 220−380 kg/m2 s, heat flux 30−170 W/cm2, and an exit vapor quality, xout, from 0.2 to 0.75. The heat sink was a pin-fin microchannel module installed in an open flow loop. Deviation from the measured area average temperatures was 1.5° C at q = 30 W/cm2, and 2.0° C at q = 170 W/cm2. These results indicate that use of pin-fin microchannel heat sink enables keeping an electronic device near uniform temperature under steady state and transient conditions. The heat transfer coefficient varied significantly with refrigerant quality and showed a peak at an exit vapor quality of 0.55 in all the experiments. At relatively low heat fluxes and vapor qualities, the heat transfer coefficient increased with vapor quality. At high heat fluxes and vapor qualities, the heat transfer coefficient decreased with vapor quality.
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Gilmore Nicholas, Timchenko Victoria, Menictas Chris, Microchannel cooling of concentrator photovoltaics: A review, Renewable and Sustainable Energy Reviews, 90, 2018. Crossref
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Yu Hao, Zhuang Jiaojiao, Li Tongling, Li Wenfei, He Tianbiao, Mao Ning, Influence of transient heat flux on boiling flow pattern in a straight microchannel applied in concentrator photovoltaic systems, International Journal of Heat and Mass Transfer, 190, 2022. Crossref