Heat transfer enhancement of micro oscillating heat pipes with self-rewetting fluid
Heat transfer enhancement of micro oscillating heat pipes with self-rewetting fluid
复制标题
自再润湿流体强化微振荡热管传热
DOI：
10.1016/j.ijheatmasstransfer.2013.11.031
复制
发表时间：
2014-03-01
影响因子：
5.2
通讯作者：
Wang, Shuangfeng
中科院分区：
文献类型：
--
作者：
Hu, Yanxin;Liu, Tengqing;Wang, Shuangfeng
研究了自再湿流体强化微振荡热管的传热性能。为了阐明其强化传热的机理，对比分析了SRWFs和去离子水的热物理性质（包括表面张力、接触角和导热系数）。此外，为了了解增强效果，对MOHP进行了实验研究。在实验过程中，MOHP的传热长度（L）分别为100，150和200毫米，由4个曲折转弯和内径（D-1）分别为0.4，0.8，1.3毫米。采用SRWF和去离子水作为工作流体。结果表明，由于表面张力随温度升高而增加的独特性质，SRWF可以自发润湿较热的区域。SRWF的毛细阻力远小于去离子水，有利于提高工质的循环效率。与水相比，SRWF作为MOHP的工作流体，具有更好的热性能，可以降低热阻，扩大MOHP的有效工作范围。(C)2013爱思唯尔有限公司保留所有权利。
This paper discusses the heat transfer enhancement of micro oscillating heat pipes (MOHPs) using self-rewetting fluid (SRWF). To clarify the heat transfer enhancement mechanism, the thermo-physical properties (including surface tensions, contact angles and thermal conductivities) of SRWFs and deionized water have been comparatively analyzed. Furthermore, to find out the strengthening effect, experimental studies were performed on MOHPs. During the experiments, MOHPs with heat transfer length (L) of 100, 150 and 200 mm, consisting of 4 meandering turns and inner diameter (D-1) of 0.4, 0.8, 1.3 mm were adopted. SRWF and deionized water were employed as the working fluids. The results showed that, due to the unique property that the surface tension increases with increasing temperature, the SRWF can spontaneously wet the hotter region. The capillary resistance of the SRWF was much smaller than that of the deionized water, which is conductive to improving the circulation efficiency of the working fluid. Compared with the water, as the working fluid of the MOHPs, the SRWF exhibited much better thermal performance, which can decrease the thermal resistance and extend the effective operation range of MOHPs. (C) 2013 Elsevier Ltd. All rights reserved.