期刊
APPLIED THERMAL ENGINEERING
卷 153, 期 -, 页码 808-827出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2019.03.066
关键词
Micro-heat pipe arrays; Latent heat storage; Integrated collector-storage solar water heater; Lap-joint-type heat pipe; Normalized charging efficiency
资金
- Beijing Municipal Natural Science Foundation [3192009]
This study investigates a proposed novel integrated collector-storage solar water heater (ICSSWH) combined with lap-joint-type micro-heat pipe arrays (MHPAs) and latent heat storage. In the proposed system, the solar energy irradiated on ICSSWH is collected and stored in a phase-change material via MHPA with fins attached to the storage section inside the heat storage tank (HST). The stored thermal energy is transferred to the water supply by two multi-channel flat tubes attached to the extraction section of MHPA outside the HST. The effects of environmental conditions during the four seasons and the flow rate and inlet temperature of the water supply on the thermal response of ICSSWH are reported. The highest efficiency reached 61.5% and the average extraction power and average outlet temperature reached 1323.3 W and 42.1 degrees C, respectively. The thermal storage efficiency of the proposed ICSSWH is evaluated by using the normalized mean charging efficiency curve, the intercept and slope of which are 0.682 and 4.847 WK/m(2), respectively. Furthermore, mathematical fitting is performed to obtain the function between the mean outlet temperature or extraction power and inlet temperature or volume flow rate during the thermal release process.
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