Heat release property of phase change materials based on a microchannel heat exchanger

doi:10.19799/j.cnki.2095-4239.2020.0155

Abstract

Abstract:

The factors affecting the process of phase change material (PCM) storage and heat release must be understood to improve the PCM storage and heat release efficiency. This study presents a plate heat exchanger heat unit model based on the solidification/melting model of FLUENT software, south of Switzerland group independent research and development of sodium acetate composite PCM on the exothermic process of solidification simulation, analyzed the different heat transfer structure, fluid velocity, and thickness of PCM for heat transfer process, the influence of PCM and heat unit on a flat plate heat exchanger structure optimization, the innovative design of microchannel plate heat exchanger heat units. The results show that the heat exchanger structure has an important effect on the heat transfer performance. The heat transfer velocity is improved with the fluid flow rate increase; however, the velocity and temperature fields are not uniform, and the heat transfer performance is limited. The total solidification time of the PCM increases with its thickness. The simulation results are used to prepare a phase change prototype, build a storage/heat release system, and verify the simulation results by experimental data comparison.

Key words: phase change material base on trihydrate sodium acetate, microchannel heat exchanger phase change heat exchanger

CLC Number:

TK 02

Wen'jie YE, Xiao YANG, Fuhua SUN, Dongmei YANG, Wei DU, Bo YANG, Yang LIU, Qiyang WANG. Heat release property of phase change materials based on a microchannel heat exchanger[J]. Energy Storage Science and Technology, 2020, 9(6): 1747-1754.

Figures/Tables 13

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