Experimental investigation on mixed-refrigerant for closed-cycle Joule-Thomson cryocoolers

N. Tzabar, Z. Lapp

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

Mixed-Refrigerant (MR) Joule-Thomson (JT) cryocoolers have being under development in our laboratory for various applications during the last few years. We have tested several MRs at different operation conditions and with a few different compressors. One major requirement, that is common to all applications, is a fixed cooling-temperature within all expected environmental conditions, especially different ambient temperatures. Unlike with pure gases, the cold temperature obtained with JT cryocoolers operating with MRs is not constant and depends on the ambient temperature. The present paper gives experimental results for two setups with a single MR (Ne+N2+HCs) that was selected according to previous researches. The experiments included two types of compressors, one is oil-lubricated and the other is oil-free. As a result of this experimental research we have mapped the MR performances over a wide range of operating conditions: high pressures of 2.1 to 2.9 MPa and low pressures of 0.083 to 0.134 MPa for ambient temperatures between -40 to 65°C. A method for improving the cold-temperature stability is also demonstrated.

Original languageEnglish
Title of host publicationAdvances in Cryogenic Engineering - Transactions of the Cryogenic Engineering Conference-CEC
Pages1121-1128
Number of pages8
DOIs
StatePublished - 2010
Externally publishedYes
Event2009 Joint Cryogenic Engineering and International Cryogenic Materials Conferences - Tucson, AZ, United States
Duration: 28 Jun 20092 Jul 2009

Publication series

NameAIP Conference Proceedings
Volume1218
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference2009 Joint Cryogenic Engineering and International Cryogenic Materials Conferences
Country/TerritoryUnited States
CityTucson, AZ
Period28/06/092/07/09

Keywords

  • Closed cycle cryocooling
  • Cryocooler
  • Joule-Thomson
  • Mixed refrigerant

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