Clogging in micromachined Joule-Thomson coolers: Mechanism and preventive measures

被引：18

作者：

Cao, H. S. ^{[1
]}

Vanapalli, S. ^{[1
]}

Holland, H. J. ^{[1
]}

Vermeer, C. H. ^{[1
]}

ter Brake, H. J. M. ^{[1
]}

机构：

[1] Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands

来源：

APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 03期

关键词：

ICE; CONDENSATION; EVAPORATION; H2O; SUPERCONDUCTIVITY; KINETICS;

D O I：

10.1063/1.4815987

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Micromachined Joule-Thomson coolers can be used for cooling small electronic devices. However, a critical issue for long-term operation of these microcoolers is the clogging caused by the deposition of water that is present as impurity in the working fluid. We present a model that describes the deposition process considering diffusion and kinetics of water molecules. In addition, the deposition and sublimation process was imaged, and the experimental observation fits well to the modeling predictions. By changing the temperature profile along the microcooler, the operating time of the microcooler under test at 105 K extends from 11 to 52 h. (C) 2013 AIP Publishing LLC.

引用

页数：4

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