矩形微槽微冷系统相变换热实验的研究  

An Experimental Study on Phase-Change Heat Transfer in Rectangular Micro-Capillary Grooves Cooling System

作　　者：李蓓[1] 赵孝保[1] 刘瑛[1] 刘志刚[2] 

机构地区：[1]南京师范大学动力工程学院,江苏南京210042 [2]山东省科学院能源研究所,山东济南250014

出　　处：《南京师范大学学报（工程技术版）》2007年第4期45-47,58,共4页Journal of Nanjing Normal University(Engineering and Technology Edition)

基　　金：江苏省自然科学基金(2006222)资助项目

摘　　要：对不同尺寸的矩形竖直微槽群表面相变换热微冷系统在液位高度及微槽表面尺寸等因素影响下的相变换热效果进行了实验研究.实验确定了获得最大热流密度时的微槽表面尺寸为槽宽、槽深以及槽间距分别为0.2mm、0.8mm、0.2mm以及槽道数目为50的微槽;实验表明液位高度与相变换热强度有很大的关联,并且液位高度在加热中心时获得最大热流密度,当液位高度低于加热中心的时候,液位越高,换热强度越好,当液位高度高于加热中心的时候,液位高度与换热强度没有很大的关联.An experimental study is conducted where a phase-change heat transfer performance was investigated in a rectangular vertical micro capillary grooves cooling system under the potential influence of such factors as grooves surface size and liquid height. When the maximum heat flux density is acquired, the experiment confirms the groove surface size as follows ： 0.2 mm in width, 0.8 mm in depth, and 0.2 mm in space between, and the number of grooves is 50. The experiment shows a strong relationship between the performance of heat transfer and liquid height. It is when the heating center and liquid height are at the same level that the cooling system runs with maximum efficiency. When the liquid height is lower than heating center, the higher liquid height level is, the more heat transfer effect it will be. When the liquid height is higher than the heating center, there is no significant relationship between liquid height and phase-change heat transfer.

关 键 词：微槽群 液位高度 微槽尺寸 相变换热 热流密度 

分 类 号：TK124[动力工程及工程热物理—工程热物理]