Development and investigation of a loop heat pipe with a high heat-transfer capacity
Development and investigation of a loop heat pipe with a high heat-transfer capacity
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DOI：
10.1016/j.applthermaleng.2017.11.084
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发表时间：
2018-02
影响因子：
6.4
通讯作者：
Y. Maydanik;V. Pastukhov;M. Chernysheva
中科院分区：
文献类型：
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作者：
Y. Maydanik;V. Pastukhov;M. Chernysheva
环状热管(LHP)是一种被动换热装置，可用于低潜热回收的节能系统、可再生能源的换热，也可用于具有远程散热器或热源的不同设备的热调节系统。本文介绍了以氨水为工质的21 m不锈钢低热泵的研制和热试验结果。该装置具有直径24 mm的圆柱形蒸发器，活动区长度为188 mm，配有有效孔径为1.0 5 µm的镍芯，孔隙率为70%。该低压冷凝器为310 mm长的管中管式换热器，由4 °C和20 °C的自来水冷却，在装置水平方向上进行了试验。在冷却温度为20 °C时，最大热负荷为1700 W(12 W/cm~2)，蒸汽温度为62 °C时，对应的热源温度为89 °C，此时“热源-冷却液”系统的热阻等于0.034 °C/W。
Loop heat pipes (LHPs) are passive heat-transfer devices which may be used in energy-efficient systems of recovery of low-potential heat, for heat transfer from renewable energy sources, and also in systems of thermal regulation of different equipment with remote heat sinks or sources. The paper shows the results of development and thermal tests of an LHP 21 m long made of stainless steel with ammonia as a working fluid. The device had a cylindrical evaporator 24 mm in diameter with an active zone length of 188 mm equipped with a nickel wick with an effective pore radius of 1.05 µm and a porosity of 70%. The LHP condenser made in the form of a pipe-in-pipe heat exchanger 310 mm long was cooled by running water with a temperature of 4 °C and 20 °C. Tests were conducted at a horizontal orientation of the device. At a cooling temperature of 20 °C a maximum heat load of 1700 W (12 W/cm2) was achieved at a vapor temperature of 62 °C, which corresponded to a heat source temperature of 89 °C. In this case the thermal resistance of the “heat source – cooling liquid” system was equal to 0.034 °C/W.