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International Heat Transfer Conference 16

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

EXPERIMENTAL STUDY ON AN OHP WITH INNER DINAMETER EXCEEDING MAXIMUM HYDRAULIC DINAMETER

Lilin Chu
Marine Engineering College, Dalian Maritime University, Dalian, Liaoning 116026 China

Yulong Ji
Marine Engineering College, Dalian Maritime University, Dalian, Liaoning 116026 China

Chunrong Yu
Marine Engineering College, Dalian Maritime University, Dalian, Liaoning 116026 China

Zhenting Wu
Marine Engineering College, Dalian Maritime University, Dalian, Liaoning 116026 China

Hailang Kuang
Marine Engineering College, Dalian Maritime University, Dalian, Liaoning 116026 China

Zongyu Wang
Marine Engineering College, Dalian Maritime University, Dalian, Liaoning 116026 China

Fengmin Su
Marine Engineering College, Dalian Maritime University, Dalian, Liaoning 116026 China

Yang Guo
Marine Engineering College, Dalian Maritime University, Dalian, Liaoning 116026 China

Chunji Yan
Marine Engineering College, Dalian Maritime University, Dalian, Liaoning 116026 China

Hongbin Ma
Marine Engineering College, Dalian Maritime University, Dalian, Liaoning 116026 China; Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, Missouri, 65211, USA

DOI: 10.1615/IHTC16.her.023885
pages 4667-4673


KEY WORDS: Heat pipe, Two-phase/Multiphase flow, Oscillating heat pipe, Maximum hydraulic diameter, Experimental test, Mathematical model

Abstract

In order to understand the influence of maximum hydraulic diameter (MHD) on the heat transfer performance of oscillating heat pipe (OHP), a copper tube with 6 mm inside diameter and 8 mm outside diameter was used to fabricate an OHP. The OHP has 8 turns. Water and alcohol was charged into the OHP separately. Heat transfer performance of the OHP was studied by experiments with the cooling water temperature of 20 °C, liquid filling ratio of 50%, and operating angle of 0 ° to 90 °. The results show that even the inner diameter of the OHP exceeds 91.6% of the maximum hydraulic diameter, it can still work and has good heat transfer performance. When the OHP charged with water and operated at the heat load of 1400 W, it can reach the minimum thermal resistance of 0.018 °C / W. Additionally, the optimal operating angle will be less than 90 ° when the diameter exceeds the diameter of MHD, but when the operating angle equal to 0 °, the oscillating heat pipe is difficult to start.

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