Effect of working fluid on heat transfer performance of the anti-gravity loop-shaped heat pipe》.pdfVIP

Applied Thermal Engineering 88 (2015) 391e397 Contents lists available at ScienceDirect Applied Thermal Engineering journal homepage: /locate/apthermeng Effect of working fluid on heat transfer performance of the anti-gravity loop-shaped heat pipe * Hui Li, Bo Zhou, Yong Tang , Rui Zhou, Zhongshan Liu, Yingxi Xie Key Laboratory of Surface Functional Structure Manufacturing of Guangdong Higher Education Institutes, South China University of Technology, Guangzhou 510640, China a r t i c l e i n f o a b s t r a c t Article history: This paper investigates the effect of working fluid on the thermal performance of the Anti-Gravity Loop- Received 17 June 2014 Shaped Heat Pipe (AGLSHP). In the experiments, the AGLSHP is designed and tested for the ground- Received in revised form surface condition, and deionized water is chosen as the working fluid. Two factors are selected in this 20 August 2014 study: (1) three different filling ratios (filling coefficient ε ranges from 80% to 120%); (2) two different Accepted 20 September 2014 wick structures, including single-powder (SP) and continuous step-graded (CSG) sintered wicks. The Available online 30 September 2014 results indicate that the effect of the filling ratios of the working fluid is remarkable on the heat transfer performance. Specifically, the low filling ratio sample sh