Analysis of heat storage and release performance of tube bundle phase change heat accumulator

doi:10.19799/j.cnki.2095-4239.2022.0057

Abstract

Abstract:

The model of multi row tube bundle phase change heat storage unit is developed, and the effects of a varying number of tubes in the square cavity, as well as various arrangement approaches and tube wall temperatures on the heat storage and release of phase change heat storage unit are numerically simulated. The findings reveal that the natural convection can be improved and the heat transfer area between the circular tube and the surrounding fluid can be increased, with an increasing number of tubes, that is, the change of the arrangement mode and the corresponding liquid phase curve almost changes linearly at the first, and the curve's slope increases gradually with the number of tubes' increase. The findings reveal that the arrangement's change can hasten the melting and solidification process of PCM and substantially improve its heat storage and release performance. Additionally, the pipe wall temperature also has a crucial effect on the heat storage and release performance, but the influence decreases with the pipe wall temperature's increase.

Key words: multi row tube bundle, heat accumulator, arrangement mode, pipe wall temperature, numerical simulation

CLC Number:

TK 02

Wenlan YE, Ming ZHAO, Mingyu HU, Yang TIAN. Analysis of heat storage and release performance of tube bundle phase change heat accumulator[J]. Energy Storage Science and Technology, 2022, 11(7): 2151-2160.

Figures/Tables 11

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