Thermal assessment on solid-liquid energy storage tube packed with non-uniform angled fins

被引:89
作者
Guo, Junfei [1 ]
Wang, Xinyi [1 ]
Yang, Bo [1 ,2 ]
Yang, Xiaohu [1 ,3 ]
Li, Ming-Jia [3 ]
机构
[1] Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Inst Bldg Environm & Sustainabil Technol, Xian 710049, Shaanxi, Peoples R China
[2] Res Inst Yanchang Petr Co Ltd, Xian 710061, Shaanxi, Peoples R China
[3] Xi An Jiao Tong Univ, Sch Energy & Power Engn, Key Lab Thermofluid Sci & Engn, Minist Educ, Xian 710049, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
Solid-liquid phase change; Shell-and-tube thermal energy storage tube; Non-uniform distribution; Angled fins; PHASE-CHANGE MATERIAL; HEAT-TRANSFER CHARACTERISTICS; NANOPARTICLE ENHANCED PCM; PALMITIC-STEARIC ACID; PERFORMANCE ENHANCEMENT; MELTING PROCESS; SYSTEM; THICKNESS; SOLIDIFICATION; GRAPHITE;
D O I
10.1016/j.solmat.2021.111526
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 solid-liquid phase change energy storage system promoted the efficient and sustainable utilization of dispersive and intermittent renewable energy. Low energy storage rate and unbalanced thermophysical char-acteristics existed in the vertical shell-and-tube heat storage tubes. To improve thermal properties and melting uniformity, this paper proposed a non-uniform angled fin type considering the optimization by the non-uniform arrangement and angled fins with small angles. A visual experimental platform was designed and built, and the reliability of the numerical model was verified by the experimental results. Numerical simulations of a single shell-and-tube heat storage tube regarding maximizing phase change rate were carried out. The development of the phase change interface and transient temperature field during the charging process of the non-uniform angled fins with downward 10 degrees were obtained. Results showed that, compared with the uniform straight fin tube, the non-uniform angled fin can effectively promote the melting process of the whole fin tube, especially in the bottom area, leading to a 69.59% reduction in complete melting time. This provided a reference for the performance optimization of the shell-and-tube finned phase change heat storage tube.
引用
收藏
页数:15
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