Heat transfer characteristics of the innovative spray-type packed bed thermal energy storage: An experimental study

被引：5

作者：

Lin, Lin ^{[1
]}

Wang, Liang ^{[1
,2
]}

Bai, Yakai ^{[1
]}

Lin, Xipeng ^{[1
,2
]}

Zhang, Shuang ^{[1
]}

Ge, Zhiwei ^{[1
,2
]}

Chen, Haisheng ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

JOURNAL OF ENERGY STORAGE | 2023年 / 73卷

基金：

中国国家自然科学基金;

关键词：

Spray-type packed bed; Thermal energy storage; Liquid-to-solid heat transfer; Heat transfer coefficient; CONCENTRATED SOLAR POWER; UNIFORM SIZED SPHERES; TRANSFER COEFFICIENT; PERFORMANCE; SYSTEM; FLOW; GAS; WATER; MASS;

D O I：

10.1016/j.est.2023.108573

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The shift to clean energy and the promotion of renewable energy sources are the dominant trends in the sustainable development of global energy employment. Thermal energy storage (TES) technology can help reduce the mismatch between thermal energy supply and demand by smoothing out peak demand periods. The spray type packed bed thermal energy storage is an innovative heat storage technology that reduces the use of liquid heat transfer fluid (HTF) by introducing a spray device. However, the mechanism of flow and heat transfer inside the spray-type packed bed thermal energy storage is not yet clear. Therefore, in this study, a 10 kW/10 kWh spray-type packed bed TES test rig was established using aluminum spheres as storage media and thermal oil as HTF, and the heat transfer performance was studied experimentally. The results indicate that higher charging temperatures and flow rates lead to a higher liquid-to-particle heat transfer coefficient. An empirical correlation for heat transfer in spray-type packed bed TES was developed. With substantial reduction in HTF usage, the heat transfer Nusselt number of spray-type packed bed can basically approach that of a fully-filled packed bed.

引用

页数：13

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