文献类型：期刊文献

英文题名：Effect of inventory on the heat performance of copper-water loop heat pipe

作者：Zhang, Li[1];Xu, Jiayin[1];Xu, Hong[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2013

卷号：44

起止页码：875

外文期刊名：EXPERIMENTAL THERMAL AND FLUID SCIENCE

收录：;EI(收录号：20124715693828);WOS:【SCI-EXPANDED(收录号:WOS:000316515400092)】；

基金：The authors are grateful for the support of the Shanghai "Phosphor" Science Foundation under Grant No. 11QA1401800.

语种：英文

外文关键词：Loop heat pipe; Copper wick; Start-up; Inventory; Heat-transfer capacity

摘要：The operating characteristics of a copper-water loop heat pipe (LHP), including start-up property, heat-transfer capacity, and heat resistance, under four different charge ratios (52.2-78.3%) were experimentally investigated. The LHP had a cylindrical evaporator (22 mm diameter and 80 mm long) with a sintered copper wick, and the clearance between the evaporator envelope and the wick surface was eliminated to attain a low heat contact resistance. The porosity of the wick was 44.54%, and the effective pore radius was 19.11 mu m. The experiment showed that higher inventory is an effective method in keeping the wick saturated within the low heat-load range and in supplying adequate flow of the subcooled liquid from the condenser to cool the water in the compensation chamber within the medium heat-load range. Thus, fast start-up of 260 s (heat load: 30W; heat flux: 8.5 x 10(3) W/m(2)), maximum heat-transfer capacity of 500 W (under allowable evaporator wall temperature of 85 degrees C), and minimum LHP thermal resistance of 0.075 degrees C/W (under 500W heat load) were realized by the LHP charged with an optimal 69.6% volume ratio. (C) 2012 Elsevier Inc. All rights reserved.