Experimental tests and modeling of the optimal orifice size for a closed cycle 4He sorption refrigerator

J. Lau; M. Benna; M. Devlin; S. Dicker; L. Page

doi:10.1016/j.cryogenics.2006.08.003

Experimental tests and modeling of the optimal orifice size for a closed cycle ⁴He sorption refrigerator

J. Lau, M. Benna, M. Devlin, S. Dicker, L. Page

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

16 Scopus citations

Abstract

Closed cycle ⁴He sorption refrigerators are an increasingly popular choice for remote cryogenic operations. The presence of a superfluid film on the inner walls of the evaporation pot limits their performance. We present a simple model of the gas, film, and heat flow in a ⁴He sorption refrigerator, taking into account the effects of an orifice to limit superfluid film flow. The model serves as a useful guideline for optimizing cryogenic performance. We also present a diagram of hold time vs. steady state temperature as a function of the radius of the orifice and compare the model to measurements.

Original language	English (US)
Pages (from-to)	809-814
Number of pages	6
Journal	Cryogenics
Volume	46
Issue number	11
DOIs	https://doi.org/10.1016/j.cryogenics.2006.08.003
State	Published - Nov 2006

All Science Journal Classification (ASJC) codes

General Materials Science
General Physics and Astronomy

Keywords

He II systems (E)
Sorption coolers (E)
Superfluid helium (He II) (B)

Access to Document

10.1016/j.cryogenics.2006.08.003

Cite this

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title = "Experimental tests and modeling of the optimal orifice size for a closed cycle 4He sorption refrigerator",

abstract = "Closed cycle 4He sorption refrigerators are an increasingly popular choice for remote cryogenic operations. The presence of a superfluid film on the inner walls of the evaporation pot limits their performance. We present a simple model of the gas, film, and heat flow in a 4He sorption refrigerator, taking into account the effects of an orifice to limit superfluid film flow. The model serves as a useful guideline for optimizing cryogenic performance. We also present a diagram of hold time vs. steady state temperature as a function of the radius of the orifice and compare the model to measurements.",

keywords = "He II systems (E), Sorption coolers (E), Superfluid helium (He II) (B)",

author = "J. Lau and M. Benna and M. Devlin and S. Dicker and L. Page",

note = "Funding Information: The authors would like to thank the Princeton University Physics Department machine shop for fabricating the 4 He refrigerators. We are also grateful to our colleagues in the Gravity Group at Princeton University and the Experimental Cosmology Group at University of Pennsylvania for many useful discussions. This work was supported by the US National Science Foundation through awards AST-0408698 for the ACT project and PHY-0355328 for the Princeton Gravity Group.",

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AU - Lau, J.

AU - Benna, M.

AU - Devlin, M.

AU - Dicker, S.

AU - Page, L.

N1 - Funding Information: The authors would like to thank the Princeton University Physics Department machine shop for fabricating the 4 He refrigerators. We are also grateful to our colleagues in the Gravity Group at Princeton University and the Experimental Cosmology Group at University of Pennsylvania for many useful discussions. This work was supported by the US National Science Foundation through awards AST-0408698 for the ACT project and PHY-0355328 for the Princeton Gravity Group.

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AB - Closed cycle 4He sorption refrigerators are an increasingly popular choice for remote cryogenic operations. The presence of a superfluid film on the inner walls of the evaporation pot limits their performance. We present a simple model of the gas, film, and heat flow in a 4He sorption refrigerator, taking into account the effects of an orifice to limit superfluid film flow. The model serves as a useful guideline for optimizing cryogenic performance. We also present a diagram of hold time vs. steady state temperature as a function of the radius of the orifice and compare the model to measurements.

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KW - Sorption coolers (E)

KW - Superfluid helium (He II) (B)

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