Phase change characteristic study of spherical PCMs in solar energy storage
Phase change characteristic study of spherical PCMs in solar energy storage
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DOI：
10.1016/j.solener.2009.02.006
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发表时间：
2009-08
期刊：
影响因子：
6.7
通讯作者：
M. Veerappan;S. Kalaiselvam;S. Iniyan;R. Goic
中科院分区：
文献类型：
--
作者：
M. Veerappan;S. Kalaiselvam;S. Iniyan;R. Goic
This paper investigates the phase change behavior of 65mol% capric acid and 35mol% lauric acid, calcium chloride hexahydrate, n-octadecane, n-hexadecane, and n-eicosane inside spherical enclosures to identify a suitable heat storage material. Analytical models are developed for solidification and melting of sphere with conduction, natural convection, and heat generation. Both the models are validated with previous experimental studies. Good agreement was found between the analytical predictions and experimental study and the deviations were lesser than 20%. Heat flux release at the wall, cumulative energy release to the external fluid, are revealed for the best PCM. The influence of the size of encapsulation, initial temperature of the PCM, the external fluid temperature on solidified and molten mass fraction, and the total phase change time are also investigated.
