WETTABILITY ENHANCEMENT OF SINTERED COPPER WICK HEAT PIPEBY COATING OF NANO ALUMINA

摘要：

　　In the application of heat pipe for electronics cooling, its maximum heat transfer capability, Qmax,,typically will be determined by wicking capability.The dry-out occurring in evaporator is due to insufficient of working fluid which supply by capillary pressure of wick structure is one of a main failure mode of heat pipe.Therefore, any enhancement of wick,s surfacewettability thatincreases the capillary pressure will increase the performance of the heat pipe.Thisresearch work demonstrates that the improvement in the maximum heat transfer rate and reducing thermal resistance of modified sintered powder heat pipe over normaltype of similar geometry is the consequence of enhanced surface wettability by coating of nano alumina.In this experimental study, the maximum heat transfer rate of heat pipe increased about 130% and the total thermal resistance of heat pipe reduced almost half due to the nano alumina coated powder wick.The evaporator heat transfer coefficient of coated wick increased 185% in comparison with that of without coating while the condenser heat transfer coefficients are almost identical.

关键词： heat pipe wettability surface modification maximum heat transfer rate nano coating

作者: Thanh-Long Phan Masataka Mochizuki Yuji Saito Mohammad Shahed Ahamed Yoji Kawahara

作者单位: Thermal Technology Division, Engineering Department, Fujikura Ltd.,1-5-1, Kiba, Koto-ku, Tokyo 135-8512, Japan

会议类型: 国际会议

会议名称: The 11th International Heat Pipe Symposium(第十一届国际热管研讨会)

会议地点: 北京

会议语种:英文

页码: 65-70

在线出版日期: 2013-06-09（万方平台首次上网日期，不代表论文的发表时间）