Experimental Study on Thermal Characteristics of Solar Heat Storage Water Tank with Phase Change Material

Chen Yankang; Zhang Hua; Wang Zilong; Zhang Qiaodan; Liang Hao

doi:10.3969/j.issn.0253-4339.2019.02.105

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Experimental Study on Thermal Characteristics of Solar Heat Storage Water Tank with Phase Change Material

更新时间：2024-07-18

- Experimental Study on Thermal Characteristics of Solar Heat Storage Water Tank with Phase Change Material
- Journal of Refrigeration Vol. 40, Issue 2, (2019)
- 作者机构：
  
  1. 上海理工大学能源与动力学院
  2. 住房和城乡建设部科技与产业化发展中心
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0253-4339.2019.02.105
  CLC：
- Published：2019
- 稿件说明：
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Chen Yankang, Zhang Hua, Wang Zilong, et al. Experimental Study on Thermal Characteristics of Solar Heat Storage Water Tank with Phase Change Material[J]. Journal of refrigeration, 2019, 40(2).
DOI：

Chen Yankang, Zhang Hua, Wang Zilong, et al. Experimental Study on Thermal Characteristics of Solar Heat Storage Water Tank with Phase Change Material[J]. Journal of refrigeration, 2019, 40(2). DOI： 10.3969/j.issn.0253-4339.2019.02.105.

摘要

蓄热水箱是太阳能热利用系统中的关键部件之一。为提高太阳能热水系统效率，在蓄热水箱中添加八水氢氧化钡相变材料，在初始水温为80 ℃、进水温度为5 ℃的工况下，研究相变材料对蓄热水箱热特性的影响。结果表明：相变材料使蓄热水箱的蓄热量从18.81 MJ提高至19.07 MJ，随着进口体积流量的增大，蓄热水箱混合数先减小后增大，而有效释热效率先增大后减小且在3 L/min时达到峰值92.2%。相变材料的加入能够提高蓄热水箱的有效释热效率，同时能够提高水箱的热分层特性，且位置越靠近进口改善效果越好。

Abstract

The heat storage tank is an indispensable component in a solar thermal utilization system. To improve the efficiency of a solar water heating system

phase change material Ba(OH)2?8H2O was added to a heat storage tank. The thermal properties of the heat storage tank were then studied through experiments when the initial water temperature was 80 ℃ and the inlet temperature was 5 ℃. Results showed that the heat storage of the water tank increased from 18.81 to 19.07 MJ when adding the phase change material. With the increase in the inlet volume flow rate

the MIX number of the water tank initially decreased and then increased

whereas the effective heat release efficiency first increased and then decreased. The maximum efficiency of 92.2% occurred at a flow rate of 3 L/min. The addition of the phase change material could increase the heat release efficiency and heat stratification characteristics of the heat storage tank

and the closer the position of phase change material is to the inlet

the better the improvement is.

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Related Author

Liu Jinya

Wang Liwei

Wang Jiayun

Wang Ruzhu

Zhang Qiaodan

Zhang Hua

Wang Zilong

Chen Yankang

Related Institution

Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University

Qingdao Haier-Medical Co., Ltd.

School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering

Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences

Guangdong University of Technology, School of Materials and Energy

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