Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10637848 | Cryogenics | 2005 | 5 Pages |
Abstract
High frequency (30-50Â Hz) multi-stage pulse tube coolers that are capable of reaching temperatures close to 20Â K or even lower are a subject of recent research and development activities. This paper reports on the design and test of a two-stage pulse tube cooler which is driven by a linear compressor with nominal input power of 200Â W at an operating frequency of 30-45Â Hz. A parallel configuration of the two pulse tubes is used with the warm ends of the pulse tubes located at ambient temperature. For both stages, the regenerator matrix consists of a stack of stainless steel screen. At an operating frequency of 35Â Hz and with the first stage at 73Â K a lowest stationary temperature of 19.6Â K has been achieved at the second stage. The effects of input power, frequency, average pressure, and cold head orientation on the cooling performance are also reported. An even lower no-load temperature can be expected from the use of lead or other regenerator materials of high heat capacity in the second stage.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
L.W. Yang, G. Thummes,