CTAB表面活性剂脉动热管性能研究  

Investigation on Performance of CTAB Surfactant Pulsating Heat Pipe

作　　者：龚志明 王瑞祥[1] 邢美波[1] Gong Zhiming;Wang Ruixiang;Xing Meibo(Beijing Engineering Research Center of Sustainable Energy and Buildings,School of Environment and Energy Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]北京市建筑能源高校综合利用工程技术研究中心环境与能源工程学院北京建筑大学

出　　处：《流体机械》2020年第1期14-20,共7页Fluid Machinery

基　　金：北京市教委科技项目(KM201910016010)

摘　　要：以十六烷基三甲基溴化铵(CTAB)阳离子型表面活性剂水溶液为工质,对不同浓度的CTAB表面活性剂水溶液脉动热管的启动过程、温度振荡曲线、及传热特性进行了试验研究,并与去离子水进行对比。结果表明:随着表面活性剂浓度的增加,脉动热管的启动时间先增加后减少。浓度为0.25%的CTAB水溶液启动时间相比去离子水减少28.5%。高加热功率下,高浓度CTAB水溶液(≥0.125%)脉动热管在稳定运行阶段温度振荡幅度明显减小,且蒸发段运行温度相比去离子水降低20%。CTAB对脉动热管传热强化作用与加热功率密切相关。低加热功率下(≤40 W),CTAB表面活性剂的添加增大了传热热阻;高加热功率下,高浓度CTAB脉动热管的传热热阻明显降低。对于浓度为0.25%的CTAB水溶液脉动热管,当加热功率从20 W升高到100 W时,热阻从1.73 K/W降低到0.3 K/W,减小了83%。The performance experiments of pulsating heat pipe(PHP)were conducted using Cetyltrimethyl ammonium bromide(CTAB)aqueous solution as working fluid.Start-up characteristics,temperature oscillation curves and heat transfer characteristics of the PHP were investigated at different concentrations of CTAB surfactant aqueous solution,and the results were compared with deionized water.The results indicate that the start-up time of the PHP firstly increases and then decreases as the concentration of surfactant increases.The start-up time of the CTAB aqueous solution at a concentration of 0.25%was reduced by 28.5%compared to the deionized water.At high heating power input,the temperature oscillation amplitude of the high concentration CTAB aqueous solution(≥0.125%)pulsating heat pipe was significantly reduced during the steady operation.Meanwhile the evaporation section operating temperature was reduced by 20%compared to deionized water.At lower heating power(≤40W),the addition of CTAB surfactant increased the heat transfer resistance.While at higher heating power,the heat transfer resistance of the higher concentration CTAB pulsating heat pipe was significantly reduced.For the CTAB pulsating heat pipe with 0.25%aqueous solution,when the heating power was increased from 20 W to 100 W,the heat transfer resistance was reduced from 1.73 K/W to 0.3 K/W by 83%.

关 键 词：脉动热管 启动时间 振荡特性 传热特性 表面活性剂 

分 类 号：TH137.8[机械工程—机械制造及自动化] TK172.4[动力工程及工程热物理—热能工程]