Effect of Operating Parameters on the Performance of Axially Rotating Horizontal Heat Pipe: Experimental Investigation
A. Yassin, M., M. Abd El-Hameed, H., H. Shedid, M., Abou-Ziyan, H. (2024). Effect of Operating Parameters on the Performance of Axially Rotating Horizontal Heat Pipe: Experimental Investigation. EKB Journal Management System, 182(2), 257-287. doi: 10.21608/erj.2024.358706
M. A. Yassin; H. M. Abd El-Hameed; M. H. Shedid; H. Abou-Ziyan. "Effect of Operating Parameters on the Performance of Axially Rotating Horizontal Heat Pipe: Experimental Investigation". EKB Journal Management System, 182, 2, 2024, 257-287. doi: 10.21608/erj.2024.358706
A. Yassin, M., M. Abd El-Hameed, H., H. Shedid, M., Abou-Ziyan, H. (2024). 'Effect of Operating Parameters on the Performance of Axially Rotating Horizontal Heat Pipe: Experimental Investigation', EKB Journal Management System, 182(2), pp. 257-287. doi: 10.21608/erj.2024.358706
A. Yassin, M., M. Abd El-Hameed, H., H. Shedid, M., Abou-Ziyan, H. Effect of Operating Parameters on the Performance of Axially Rotating Horizontal Heat Pipe: Experimental Investigation. EKB Journal Management System, 2024; 182(2): 257-287. doi: 10.21608/erj.2024.358706

Effect of Operating Parameters on the Performance of Axially Rotating Horizontal Heat Pipe: Experimental Investigation

Engineering Research Journal
Volume 182, Issue 2, June 2024, Page 257-287  XML PDF (1.72 MB)
Document Type: Original Article
DOI: 10.21608/erj.2024.358706
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Authors
M. A. Yassin* 1; H. M. Abd El-Hameed1; M. H. Shedid2; H. Abou-Ziyan2
1Mechanical Power Engineering Department, Faculty of Engineering, Mattaria Helwan University,
2Mechanical Power Engineering Department, Faculty of Engineering, Helwan University, Mattaria
Abstract
This experimental study investigates the thermal performance of axially rotating horizontal wickless heat pipes under different operating conditions. A heat pipe is designed, constructed, and tested for the investigation. The experiments are conducted on a heat pipe rotating at speeds of 250-1500rpm, with Taylor numbers ranging from 3.0×107 to 1.1×109, and heat fluxes from 2090 to 16700W/m2. The heat pipe is charged with water as a working fluid, filling 100% of the evaporator volume. The effect of liquid charging is also examined, varying between 5 and 55% of the heat pipe’s inner volume. The results demonstrate that rotation significantly enhances the heat pipe’s performance. The effective thermal conductivity of heat pipes increases by 30-40% for heat flux ranging from 2090 to 8350 W/m2, and approximately 20% for higher heat fluxes as the Taylor number increases from 3.0×107 to 1.1×109. The best performance of the rotating heat pipe is achieved at the highest Taylor number of 1.1x109 and the lowest heat flux of 2090 W/m2, resulting in a remarkable 9.47-fold increase in effective thermal conductivity compared to copper. The study also identifies the optimum liquid charge for the heat pipe, which is found to be about 35% of the inner pipe volume.
Keywords
Rotating heat pipe; filling ratio; heat flux; heat transfer characteristics; heat pipe thermal performance
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