Development of a Low Noise 10 K J-T Refrigeration System.
Abstract
This report summarizes work on the development of a low noise Joule-Thomson, microminiature refrigeration system, designed for 10 K operation. Two events have occurred since the last report which have had an important influence on the confirmation through a series of experimental measurements of the remarkable cooling power at 80 K to 90 K of the nitrogen-hydrocarbon gas mixtures discussed briefly in the previous report. These experiments confirmed that these mixtures could give a refrigeration an order of magnitude greater than that attainable with argon or nitrogen at the same input pressures. In addition, it was recognized that this high efficiency allowed one to use a heat exchanger of substantially smaller surface area and a compressor designed for operation at much lower pressures. This lower pressure operation would greatly reduce the wear of the piston seals and thereby prolong the life of the system. It was also discovered in the course of these measurements that the use of the gas mixtures resulted in virtually clog-free operation of the refrigerators.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 15, 1987
- Accession Number
- ADA185258
Entities
People
- William A. Little