Development and test of a cryogenic pulsating heat pipe and a pre-cooling system
Development and test of a cryogenic pulsating heat pipe and a pre-cooling system
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DOI：
10.1063/1.4706970
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发表时间：
2012-06
期刊：
影响因子：
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通讯作者：
F. Bonnet;P. Gully;V. Nikolayev
中科院分区：
文献类型：
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作者：
F. Bonnet;P. Gully;V. Nikolayev
在低温应用中对热连接的需求正在增加，特别是因为使用了提供减小尺寸的冷指的低温冷却器。脉动热管（PHP）是一种被动式两相高性能热链接。与传统的热管一样，它具有一个充满两相流体的封闭管，能够将热量从其热部分（蒸发器）传递到冷部分（冷凝器）。任何两相低温热链的一般问题是蒸发器的预冷却，以确保蒸发器内存在液体以开始流动运动。在传统的热管中，这个问题是通过芯传递的，但在PHPs的情况下，它必须特别解决。我们已经设计，制造和测试了一个氦PHP相关的一种新的预冷系统。PHP蒸发器的冷却时间显著缩短。当冷源温度为4.2K时，PHP的最大输出功率为145mW.
The needs of thermal links in cryogenic applications are increasing, especially because of the use of cryocoolers which offer a reduced size cold finger. The Pulsating Heat Pipe (PHP) is a passive two-phase high performance thermal link. Like the conventional heat pipe, it features a closed tube filled with a two-phase fluid able to transfer heat from its hot part (evaporator) to the cold part (condenser). A general problem for any two-phase cryogenic thermal link is the pre-cooling of the evaporator to ensure the presence of liquid inside the evaporator to start the flow motion. In conventional heat pipes, this problem is by passed by the wick but in the case of PHPs it has to be specially addressed. We have designed, manufactured and tested a helium PHP associated to a novel pre-cooling system. The cool down time of the PHP evaporator is reduced significantly. The maximum transferred power of the PHP is 145 mW with a cold source at 4.2 K.