Experimental study on the cooling charge and discharge characteristics of a PCM based fin-tube thermal energy storage exchanger

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Abstract

In view of the organic phase change materials (PCM)'s low thermal conductivity which was bad for heat transfer and storage, a kind of fin-tube thermal energy storage exchanger(TESE) was proposed. The experimental study was carried out for the cooling charge and discharge characteristics of a PCM based fin-tube TESE. Experiment results showed that the difference of thermal conductivity of PCM in the solid phase and the liquid phase, and thermal expansion and contraction existing during the phase transition, led to the phenomenon that PCM based fin-tube thermal energy storage exchanger's cooling discharging rate was much higher than the charging rate, and the TESE showed good discharging characteristics of cooling. The cooling storage period of the fin-tube TESE was relatively long, and the suction and exhaust pressure of the compressor slightly decreased during the cooling storage process. Finally, the inlet water temperature of the PCM based fin-tube TESE influenced he cooling characteristics greatly, and the outlet water temperature increased linearly with time while the cooling rate decreased linearly.

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Hu, W. J., Chang, M. N., Gao, Y., Zhang, Q. L., Yang, L. Y., & Li, D. Y. (2017). Experimental study on the cooling charge and discharge characteristics of a PCM based fin-tube thermal energy storage exchanger. In Procedia Engineering (Vol. 205, pp. 3088–3095). Elsevier Ltd. https://doi.org/10.1016/j.proeng.2017.10.308

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