Abstract A miniature, closed cycle Joule-Thomson cryocooler with gas mixtures operating between 67.5K to 100K was investigated experimentally. In the experiment, two types of miniature counterflow heat exchangers were tested. One is so-called classic Hampson type heat exchanger, and another is a modified perforated plate heat exchanger which was recently developed by the authors. In the modified perforated heat exchanger, a thin stainless tube was used as a partition which was traditionally formed by diffusion welding method. The two types of heat exchanger have the same outline sizes: their diameters are 14mm, and their lengths are 120mm. With the same mixture and the same discharging pressure, the Hampson type of Joule-Thomson cryocooler achieved 70K, but the modified perforated type Joule-Thomson cryocooler achieved 67.5K. The former one obtained 2W cooling capacity at 80K, and the later one obtained 2.4W cooling capacity at 80K. Due to the better performance and simpler structure, the modified perforated plate Joule-Thomson cryocooler may become a good alternative to the classic Hampson type Joule-Thomson cryocooler in the future.
Experimental Comparison of Mixed-Refrigerant Joule-Thomson Cryocoolers with Two Types of Counterflow Heat Exchangers
Cryocoolers 10 ; 481-486
2002-01-01
6 pages
Article/Chapter (Book)
Electronic Resource
English
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