Numerical simulation of start-up characteristics and heat transfer performance of ultra-thin heat pipe

被引：0

作者：

Shi F. ^{[1
]}

Gan Y. ^{[1
]}

机构：

[1] School of Electric Power Engineering, South China University of Technology, Guangdong, Guangzhou

来源：

Huagong Xuebao/CIESC Journal | 2023年 / 74卷 / 07期

关键词：

heat transfer; numerical simulation; phase change; start-up performance; ultra-thin heat pipe;

D O I：

10.11949/0438-1157.20230429

中图分类号：

学科分类号：

摘要：

In this paper, a simplified three-dimensional transient model of ultra-thin heat pipe was proposed to simulate the process of heat pipe from start-up to stable operation. Based on the previous work of the team, the accuracy of the model was verified. Heat pipes with different vapor core thicknesses, types of wicks and bending section geometry were studied by numerical simulation. The influence of different parameters on the vapor flow characteristics, temperature distribution and start-up performance is analyzed. Based on the control theory, the thermal response characteristics of heat pipes with different structures are quantitatively analyzed. The maximum RMSE is only 0.385. The results show that the flow resistance and energy loss of vapor will increase if the vapor core thickness is too small. Different structures of wicks mainly affect the steam flow characteristics through the difference in the width of the steam channel. The smaller the vapor core thickness is, the more easily it is affected by the bending radius and bending angle of the bending section. In addition, if the thickness of the flow channel is less than 0.2 mm, it will also affect the temperature uniformity of the heat pipe and limit the vapor-liquid circulation. The total thermal resistance and start-up time of the heat pipe are mainly affected by the heat load. © 2023 Chemical Industry Press. All rights reserved.

引用

页码：2814 / 2823

页数：9

共 35 条

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