Li, Ren-fei, Gao, Wen-feng, Liu, Tao, and Lin, Wen-xian (2014) The influence of daily radiation collected on the daily heat gain of an evacuated tube solar water heater. Journal of Yunnan Normal University, 34 (1). pp. 31-35.

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Abstract

Q17，daily solar heat gain corresponding to 17MJ／m2 of daily collectible radiation is one of key parameters to evaluate the thermal performance of a solar water heater．In this paper, the influence of daily collectible radiation on the daily heat gain of an evacuated tube solar water heater is studied experimentally in the radiation condition described in GB／T 18708. Results showed that the daily heat gain linearly increases with the increase of daily colllectible radiation, but Q17 and system's efficiency coefficient almost kept constant. It was also found that when the testing condition with the daily coUectible radiations being not less than 17 MJ／m2 changed into that of not less than 16 MJ/m2，change of Q17 and the system's energy efficiency coefficient was not insignificant, implying that the testing conditions about daily collectible radiation specified in the revised version of GB／T19141 was reasonable.

Item ID:	38336
Item Type:	Article (Research - C1)
ISSN:	1007-9793
Keywords:	daily collectible radiation; daily useful heat gain; evacuated tube solar water heater; energy efficiency coefficient
Related URLs:	Publisher
Additional Information:	Original paper is written and published in Chinese.
Funders:	National Natural Science Foundation of China, Yunnan Provincial Science Foundation, China
Date Deposited:	05 May 2015 00:26
FoR Codes:	09 ENGINEERING > 0915 Interdisciplinary Engineering > 091505 Heat and Mass Transfer Operations @ 50% 09 ENGINEERING > 0915 Interdisciplinary Engineering > 091504 Fluidisation and Fluid Mechanics @ 50%
SEO Codes:	85 ENERGY > 8505 Renewable Energy > 850506 Solar-Thermal Energy @ 100%
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