零切角曲面微热管传热性能的实验研究

提出一种新型的平板式零切角曲面微热管结构,并对其性能进行了详细的实验研究。研究了充液比、倾角和工质对微热管有效导热系数的影响。结果表明,甲醇在25％充液比时效果最好;丙酮较低功率时充液比20％的热性能较好, 较高功率时25％的充液比较好。倾角对传热性能有一定的影响。以甲醇为工质的微热管性能优于丙酮为工质时的性能。此外实验研究过程中还发现了微热管的温度脉动现象,并进行了理论分析。

Experimental Study on the Thermal Performance of Wire-bonded Flat Micro Heat Pipe

In this paper, a novel wire-bonded flat micro heat pipe is presented and a detailed experimental study on its performance is executed. The investigation covers the influence of fill ratios, inclination angles and working fluids on the effective thermal conductivity. It is indicated that for the working fluid of methanol, effective thermal conductivity at fill ratio of 25% is the largest compared with the others; while for acetone the optimal value is obtained at fill ratio of 20% for the lower heating powers and 25% for the higher heating powers. The inclination angle has great effect on the thermal performance of the micro heat pipe. Micro heat pipes with methanol perform much better than those with acetone. Besides, thermal oscillation is discovered and investigated with this new type of micro heat pipe.