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

Haishan Cao; Srinivas Vanapalli; Herman J. Holland; Cristian Hendrik Vermeer; Hermanus J.M. ter Brake

doi:10.1063/1.4815987

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

Haishan Cao, Srinivas Vanapalli, Herman J. Holland, Cristian Hendrik Vermeer, Hermanus J.M. ter Brake

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

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.

Original language	Undefined
Article number	034107
Pages (from-to)	034107-1-034107-4
Journal	Applied physics letters
Volume	103
Issue number	3
DOIs	https://doi.org/10.1063/1.4815987
Publication status	Published - 18 Jun 2013

Keywords

IR-86891
METIS-297147

Access to Document

10.1063/1.4815987

Cite this

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title = "Clogging in micromachined Joule-Thomson coolers: Mechanism and preventive measures",

abstract = "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.",

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AU - Cao, Haishan

AU - Vanapalli, Srinivas

AU - Holland, Herman J.

AU - Vermeer, Cristian Hendrik

AU - ter Brake, Hermanus J.M.

PY - 2013/6/18

Y1 - 2013/6/18

N2 - 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.

AB - 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.

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