Experimental study on heat transfer performance of gas-liquid pulsating heat pipe heat exchanger

Fumin Shang,Jianhong Liu,Weijia Cao,Yifang Dong,Chaoyue Liu,Qingjing Yang,W Qin,L Wang,V Yepes

doi:10.1051/e3sconf/202016506048

Fumin Shang, Jianhong Liu + Show 7 more

Open Access

https://doi.org/10.1051/e3sconf/202016506048

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Abstract

With the continuous development of industrial technology, the safety and efficiency of thermal equipment work in related industries and industrial fields are facing many problems. First, with the improvement of integrated level, the size of electronic components is getting smaller and smaller, and the heat load per unit area is increasing, which makes the traditional heat dissipation method difficult to meet the requirements; second, with the increase of energy-saving pressure, the temperature difference of low-temperature waste heat recovery is reduced, and the traditional heat exchange equipment is difficult to meet the working requirements. The pulsating heat pipe has the characteristics of small volume and excellent heat transfer performance. In view of the heat transfer performance of the pulsating heat pipe, we designed the gas-liquid pulsating heat pipe heat exchanger and studied its heat transfer performance, which has been verified to be effective.

Highlights

With the rapid and sustainable development of China's economy, the demand for energy is increasing, so it is necessary to carry out energy conservation and consumption reduction
A pulsating heat pipe (PHP) is a new type of heat pipe invented by Japanese scholar Akachi et al[1 ~ 4] in 1994, it has the advantages of geometrical simplicity, free bending, etc
In order to enhance the heat transfer performance of the gas side of the pulsating heat pipe heat exchanger, thin aluminum fins are arranged in the condenser section

Summary

Introduction

With the rapid and sustainable development of China's economy, the demand for energy is increasing, so it is necessary to carry out energy conservation and consumption reduction. A heat pipe heat exchanger accompanied by phase change heat transfer process has emerged. The traditional heat pipe does not have these characteristics, so the pulsating heat pipe has a broad application prospect in the cooling of high-power electronic devices and equipment. Fin pipe is 1mm, the pipe diameter is 5mm, the total length is 330mm, and the center distance between two single pipes is 30mm. In order to enhance the heat transfer performance of the gas side of the pulsating heat pipe heat exchanger, thin aluminum fins are arranged in the condenser section. The thickness of the single fin is 0.5mm, the width is 28mm, and the length is 56mm. The structure diagram of gas-liquid pulsating heat pipe heat exchanger is shown in Fig.[1]

Structural parameters of gas-liquid pulsating heat pipe heat exchanger

Experimental setup and method

Results and discussion

Wall temperature analysis of pulsating heat pipe

Heat transfer analysis of pulsating heat pipe heat exchanger

Analysis of equivalent heat conductivity of pulsating heat pipe