Numerical simulation and performance optimization of a new loop gravity heat pipe

被引：0
|
作者：
Chen J. [1 ,2 ]
Liu J. [1 ,2 ,3 ]
Xu X. [1 ,2 ]
Yu Y. [1 ,2 ]
机构：
[1] School of Electric Power, South China University of Technology, Guangdong, Guangzhou
[2] Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, South China University of Technology, Guangdong, Guangzhou
[3] State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangdong, Guangzhou
来源：
Huagong Xuebao/CIESC Journal | 2023年 / 74卷 / 02期
关键词：
critical heat flux; dry area; loop gravity-assisted heat pipe; pool boiling;
D O I：
10.11949/0438-1157.20221530
中图分类号：
学科分类号：
摘要：
A new loop gravity heat pipe (LGHP) is researched and a simplified two-phase flow numerical model based on VOF method is proposed to study the flow characteristics of the working fluid in the evaporator, which can effectively simulate the generation of bubbles and the location of the dry area in the evaporator of LGHP. Based on the numerical simulation, the channel structure of the evaporator is improved to delay the appearance of the dry zone of the evaporator when it is placed horizontally. Through experimental verification, it is found that the heat transfer performance of the improved evaporator has been greatly improved, and the liquid phase storage capacity of the refrigerant in the evaporator has been improved, which double its critical heat flux (CHF) to 140 kW/m2 (heating power 2000.7 W). It is proved that the simplified model is accurate in simulating the location of the dry area, and can provide a reference for further design and improvement of the flow channel structure of the flat evaporator. © 2023 Chemical Industry Press. All rights reserved.
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页码：721 / 734
页数：13
相关论文
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