Combined effect of nanofluid concentration and filling ratio on heat transfer performance of pulsating heat pipe

2018 1st International Conference on Environment Prevention and Pollution Control Technology

生态环境科学

Bai, Lina^1 ; Su, Xinjun^1 ; Ren, Wenhao^1 ; Yang, Wenzhe^1

Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce, Tianjin, China^1

关键词: Combined actions;    Combined effect;    Filling ratio;    Heat transfer efficiency;    Heat transfer performance;    Inner diameters;    Pulsating heat pipe;    Working fluid;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/199/3/032020/pdf
DOI  :  10.1088/1755-1315/199/3/032020

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

n experimental work was investigated to study combined effect of nanofluid concentration and liquid filling ratio on heat transfer performance of pulsating heat pipe (PHP).The PHP was made of copper tube with external diameter of 4mm and inner diameter of 2mm and bended into a closed loop serpentine made of 6 U-turns. In the experiment, Al2O3/water nanofluid concentration changed from 0wt% to 0.7wt%, Al2O3/water nanofluid filling ratio ranged from 30% to 70%, and Al2O3 / water nanofluid or de-ionized water was the working fluid. Experimental results showed that there was a 0.3wt% optimum nanofluid concentration and a 50% optimum filling ratio, besides, the heat transfer efficiency of PHP with Al2O3/water could reach its maximum value (about 10.28%) only under the combined action of two parts when compared with the de-ionized water.