Frost and high-temperature resistance performance of a novel dual-phase change material flat plate solar collector

Wang, Dengjia, Liu, Hui, Liu, Yanfeng, Xu, Tao, Wang, Yingying, Du, Hu ORCID: https://orcid.org/0000-0002-1637-0626, Wang, Xiaowen and Liu, Jiaping 2019. Frost and high-temperature resistance performance of a novel dual-phase change material flat plate solar collector. Solar Energy Materials and Solar Cells 201 , 110086. 10.1016/j.solmat.2019.110086

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Abstract

In order to overcome the freezing and overheating problems of solar collectors, a novel dual-phase change material (PCM) flat plate collector was proposed in this research. There were two layers of PCMs in the solar collector, one layer material with a phase change temperature of 70 °C and another with a phase change temperature of 15 °C, respectively. They were placed in the space under the absorber plate in the dual-PCM collector. Frost and High-temperature resistance performance of the novel dual-phase change material solar collector was tested systematically in a laboratory. The experimental results showed that the time taken for the temperature of the absorber plate to increase from 60 °C to 78 °C could be prolonged by 1.6 h under high temperature conditions. Furthermore, the low-melting point PCM can substantially slow the temperature decrease of the collector by solidifying and releasing heat under the low-temperature conditions. And the time taken for the temperature of the absorber plate to decrease from 19 °C to 10 °C could be prolonged by 6.4 h and 3.1 h when low-melting PCM placed below high-melting PCM and the high-melting PCM placed below low-melting PCM. Thus it can be seen that the dual-PCM collector can be used to overcome the phenomenon of overheating and freezing. In addition, compared with an ordinary flat plate collector, the efficiency of the dual-PCM collector was increased by 24.1% and 19.6% when placing low-melting PCM below high-melting PCM and in the opposite condition respectively.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Architecture Energy Systems Research Institute (ESURI)
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TH Building construction T Technology > TS Manufactures
Publisher:	Elsevier
ISSN:	0927-0248
Date of First Compliant Deposit:	16 August 2019
Date of Acceptance:	27 July 2019
Last Modified:	01 Dec 2024 00:30
URI:	https://orca.cardiff.ac.uk/id/eprint/124939

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