A multichannel and a mini channel water-cooled heat exchanger were proposed and their applications for highly concentrating photovoltaic/thermal (HCPV/T) system were experimentally studied. A simulated heat source was used to simulate the heat flux of a photovoltaic cell in an HCPV/T system, and the influence of the flow rate, surface temperature and input voltage on the heat transfer characteristics of two heat exchangers were studied. Besides, characteristics of the two heat exchangers were qualitatively analyzed by heat transfer theory. The fitting formula of the Nusselt number and the Reynolds number was obtained from the experiment results. Results showed that, the mini channel exchanger has stronger heat exchange capability in the condition of low flow rate, but the heat exchange capability would not increase with the increase of the flow rate in the condition of high flow rate. The heat exchange capability of the multichannel exchanger was poor, while it would increase with the increase of the flow in the condition of high flow rate.
XIE Guang-jue
,
JI Jie
,
SUN Wei
,
ZHAO Zhi
,
MA Yang
. Contrast Experimental Study on the Heat Transfer Characteristics of Two Heat Exchangers for HCPV/T[J]. Advances in New and Renewable Energy, 2018
, 6(3)
: 181
-187
.
DOI: 10.3969/j.issn.2095-560X.2018.03.003
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