Experimental study on the heat transport capability of micro-grooved oscillating heat pipe

Case Studies in Thermal Engineering

Yaojie Lv¹  Fengbo Guan²  Jian Qu³  Yalin Wang³ 

[1] Corresponding author. School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu, China.;Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, Suzhou University of Science and Technology, Suzhou, Jiangsu, China;School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu, China;

关键词: Oscillating heat pipe;    Microgroove;    Heat transfer limit;    Effective thermal conductivity;   

DOI  :  

来源: DOAJ

【 摘 要 】

This paper presents an experimental study to investigate the heat transfer limit of a micro-grooved OHP at the vertical bottom heat mode. The internal hydraulic diameter of the micro-grooved OHP is about 2.0 mm, and deionized water was used as a working fluid at volumetric filling ratios (FRs) ranging from 30% to 60%. Experimental results demonstrated that the micro-grooved OHP could significantly enhance the allowable maximum input heat flux before the occurrence of dry-out owing to the capillary action provided by micro-grooved structures to facilitate condensate backflow to the evaporator. The OHP obtained a maximum effective thermal conductivity of 41.8 kW/(m·°C) at 40% FR, corresponding to a dry-out heat flux of 36.9 W/cm2 with respect to the heat transfer limit. The allowable maximum input heat flux was found to be greater than 80 W/cm2 for 50% and 60% FRs, and could be further increased by increasing the OHP turn number. This study provides a promising option to address thermal management demand for high-density power devices.

【 授权许可】

Unknown