Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5444061 | Cryogenics | 2017 | 4 Pages |
â¢A new type pulse tube cryocooler driven by the thermal-compressor was experimentally studied.â¢A minimum no-load temperature 4.9â¯K was obtained, and the cooling power was 30â¯mW@5.6â¯K.â¢The multi-bypass was firstly used in the low-frequency Stirling type pulse tube cryocooler.â¢The calculated total input power was no more than 450â¯W.
VM type pulse tube cryocooler is a new type pulse tube cryocooler driven by the thermal-compressor. This paper presented the recent experimental results on a novel single-stage VM type pulse tube cryocooler with multi-bypass. The low temperature double-inlet, orifice and gas reservoir, and multi-bypass were used as phase shifters. With the optimal operating frequency of 1.6â¯Hz and optimal average pressure of 1.4â¯MPa, a no-load temperature of 4.9â¯K has been obtained and 30â¯mW@5.6â¯K cooling power has been achieved. It was the first time for the single-stage VM-PTC obtaining liquid helium temperature reported so far. Moreover, it was also the first time for the multi-bypass being used in the low-frequency Stirling type pulse tube cryocooler.