AEO-9表面活性剂对脉动热管启动和传热特性的影响

Effect of AEO-9 Surfactant on Start-up and Heat Transfer Performance of Pulsating Heat Pipe

本文针对脂肪醇聚氧乙烯醚(AEO-9)非离子表面活性剂,在加热功率为40、60、80、100、120 W,AEO-9质量分数为10、20、30、40 mg/kg工况下,测试了脉动热管的启动时间、热阻和蒸发段温度波动,并与去离子水进行对比。结果表明:AEO-9可以缩短启动时间,启动时间随AEO-9质量分数的增大先减小后增大,在加热功率为40 W、质量分数为20 mg/kg时启动时间最多缩短了29.2%;AEO-9可以减小热阻,加热功率较小时(≤60 W),热阻随AEO-9质量分数的增大而增大;加热功率较大时(≥100 W),热阻随AEO-9质量分数的增大而减小;在加热功率为40 W、质量分数为10 mg/kg时热阻最多减小了35.8%;AEO-9可以减小蒸发段温度波动,且质量分数越高波动越小,在加热功率为120 W、质量分数为40 mg/kg时温度波动幅度最多减小了68.4%。

In this study,the start-up time,thermal resistance,and evaporation temperature fluctuation of a pulsating heat pipe were experimentally studied based on the influence of alcohol polyoxyethylene ether nonionic surfactant(AEO-9).The experimental conditions included heating powers of 40 W,60 W,80 W,100 W,and 120 W and AEO-9 mass concentrations of 10 mg/kg,20 mg/kg,30 mg/kg,and 40 mg/kg.The results indicate that AEO-9 can reduce the start-up time compared with deionized water;the start-up time first decreases and then increases as the AEO-9 mass concentration increases.When the heating power is 40 W and the AEO-9 mass concentration is 20 mg/kg,the start-up time is reduced by a maximum of 29.2%.AEO-9 can also reduce the thermal resistance.At a low heating power(≤60 W),the thermal resistance increases as the AEO-9 mass concentration increases.At a high heating power(≥100 W),the thermal resistance decreases as the AEO-9 mass concentration increases.When the heating power is 40 W and the AEO-9 mass concentration is 10 mg/kg,the thermal resistance is reduced by a maximum of 35.8%.AEO-9 can reduce the evaporation temperature fluctuation,and the fluctuation amplitude decreases as the AEO-9 concentration increases.When the heating power is 120 W and the AEO-9 mass concentration is 40 mg/kg,the temperature fluctuation amplitude is reduced by a maximum of 68.4%.