蠕动泵驱动的毛细管环路传热系统的性能研究

Performance of Capillary Loop Heat Transfer System Driven by Peristaltic Pump

液态工质在满足一定内径要求的毛细管内会形成稳定的液柱--气塞系统。本文提出利用蠕动泵驱动毛细管内气液相间隔的工质单向循环流动,形成一个具有脉动热管效应的新型两相传热系统。搭建了系统实验装置,以去离子水为工质,当毛细管内径为3 mm,管内工质流速恒定为7 m/min时,实验研究了不同充液率的两相传热系统在加热功率分别为60 W、80 W和100 W时的传热特性。结果表明:该传热系统的最佳充液率为20%,在加热功率为60、80、100 W时,充液率为20%的传热系统达到稳态时的热阻分别为0. 52、0. 38、0. 30℃/W,相比于传统的水冷传热系统其热阻分别降低了32. 5%、45. 7%、50%。

A stable liquid column-air plug system forms when liquid working fluid flows in a capillary tube that meets specific requirements for the inner diameter. In this paper,a novel two-phase heat transfer system with a pulsating heat pipe is proposed for the scenario in which a liquid-vapor two-phase working fluid in the capillary tube is driven by a peristaltic pump and one-way flow forms. The heat transfer characteristics of the system with different liquid filling ratios are investigated experimentally by a self-designed experimental setup with deionized water as the working fluid under 60 W,80 W,and 100 W conditions. The inner diameter of the capillary tube is 3 mm,and the working fluid flows in a capillary tube with a constant flow rate of 7 m/min. The experimental results show that the optimum liquid filling ratio of the heat transfer system is 20%. When the heating power is 60 W,80 W,and 100 W,the thermal resistance of the system with the optimum liquid filling ratio is 0. 52 ℃/W,0. 38 ℃/W,and 0. 30 ℃/W,respectively,which is reduced by 32. 5%,45. 7%,and50%,respectively,compared with that of the traditional water-cooled heat transfer system.