Effect of Structural Factors on Performance of Multi-Channel Flat Heat Pipe of Power Battery

doi:10.11908/j.issn.0253-374x.19209

Home > Archive>Volume 48, Issue 4, 2020 >559-565. DOI:10.11908/j.issn.0253-374x.19209

Effect of Structural Factors on Performance of Multi-Channel Flat Heat Pipe of Power Battery
DOI:
                        10.11908/j.issn.0253-374x.19209
                    
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                        ZHAO Lanping1ZHAO Lanping
School of Mechanical Engineering, Tongji University, Shanghai 201804, China
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ZHAO Lanping1

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ZHENG Zhenpeng1,2ZHENG Zhenpeng
School of Mechanical Engineering, Tongji University, Shanghai 201804, China;Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thermal Management Systems, Tongji University, Shanghai 201804, China
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GUO Bentao1,2GUO Bentao
School of Mechanical Engineering, Tongji University, Shanghai 201804, China;Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thermal Management Systems, Tongji University, Shanghai 201804, China
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YANG Zhigang2YANG Zhigang
Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thermal Management Systems, Tongji University, Shanghai 201804, China
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Affiliation:1.School of Mechanical Engineering, Tongji University, Shanghai 201804, China;2.Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thermal Management Systems, Tongji University, Shanghai 201804, China
Clc Number:TK172.4
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Abstract:

Using the CFD simulation method based on the volume of fluid (VOF) two-phase flow model, the characteristics of a multi-channel flat heat pipe developed for a lithium-ion battery was studied. Compared with the circular channel structure, the rectangular channel structure has a higher mass transfer rate of condensation/evaporation and a higher average velocity in the channels. The equivalent thermal conductivity of 6 square-channel flat heat pipe is 30.5% larger than that of the original structure with 6 circular channels. The heat pipe performance increases with the increase of channel number, but the increasing rate slows down gradually. With the fixed geometric parameters and the power input of the evaporation section, the performance of the multi-channel flat heat pipe is determined by the combined effect of condensation in the condensation section and the return efficiency of condensate liquid flow. As a result, the increase of the length of the condensation section does not substantially change the temperature difference between the two ends of the heat pipe, and the equivalent thermal conductivity does not reflect the effect of the length of condensation section on the performance of the heat pipe.

Key words:multi-channel flat heat pipe;equivalent thermal conductivity;temperature difference between condenser and evaporator;volume of fluid (VOF) model;structural factor

Reference

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ZHAO Lanping, ZHENG Zhenpeng, GUO Bentao, YANG Zhigang. Effect of Structural Factors on Performance of Multi-Channel Flat Heat Pipe of Power Battery[J].同济大学学报(自然科学版),2020,48(4):559~565

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Received:May 23,2019
Revised:February 25,2020
Adopted:January 16,2020
Online: April 24,2020
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