Investigation on the effect of thermoelectric cooler on LHP operation with non-condensable gas
Investigation on the effect of thermoelectric cooler on LHP operation with non-condensable gas
复制标题
热电冷却器对不凝性气体LHP运行的影响研究
DOI：
10.1016/j.applthermaleng.2016.09.050
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发表时间：
2017
影响因子：
6.4
通讯作者：
Miao Jianyin
中科院分区：
文献类型：
--
作者：
Yang Rui;Lin Guiping;He Jiang;Bai Lizhan;Miao Jianyin
不凝性气体是影响两相传热设备热工性能、运行可靠性和使用寿命的主要原因之一。在两个氨-不锈钢回路热管（LHP）中充入可控量的氮气来模拟NCG，并进行了大量的实验研究，以探讨热电制冷器（TEC）对NCG下LHP运行的影响。实验结果表明，TEC能有效地改善NCG LHP的热性能，降低稳态运行温度，扩大允许的热负荷范围，实现成功启动，大大减少温度超调，消除或抑制可能的温度振荡。然而，在使用TEC的实验过程中，也观察到了一些意想不到的现象或操作异常，如启动失败和操作温度升高。通过对实验结果的分析，提出了TEC组件的设计考虑，以更好地发挥TEC在提高NCG LHP热性能中的作用。
Non-condensable gas (NCG) is one of the main causes affecting adversely the thermal performance, operating reliability and lifespan of two-phase heat transfer devices. In this work, nitrogen was charged into two ammonia-stainless steel loop heat pipes (LHPs) with controllable amounts to simulate the NCG, and extensive experiments were conducted to investigate the effect of thermoelectric cooler (TEC) on the LHP operation with NCG. Experimental results show that the TEC can effectively improve the thermal performance of the LHP with NCG, i.e., decreasing the steady-state operating temperature, expanding the allowable heat load range, realizing a successful startup with much reduced temperature overshoot, and eliminating or inhibiting the possible temperature oscillations. However, some unexpected phenomena or operation anomalies such as startup failure and operating temperature rise were also observed during the experiments with the application of the TEC. Through analyzing these experimental results, the design considerations for the TEC assembly are proposed to better play the role of TEC in improving the thermal performance of LHPs with NCG.