Share

IIR document

A micromachined Joule-Thomson cryogenic cooler with parallel two-stage expansion.

Author(s) : CAO H. S., VANAPALLI S., HOLLAND H. J., et al.

Type of article: Article, IJR article

Summary

There is an increasing need for localized cooling in integrated circuit/microfluidic chips, where cooling is currently achieved by relatively large and bulky cooling systems. Joule–Thomson (JT) cryocoolers are suitable to address these size limitations because they have no cold moving parts and, therefore, can be easily miniaturized. We present a JT microcooler with parallel two-stage expansion that cools down to a no-load temperature of 83?K with an ambient temperature of 295?K, whereas a single-stage microcooler typically cools to about 100?K. In addition, this microcooler has the attractive feature of providing cooling powers at two temperature levels without additional manufacturing or processing steps. In changing the temperature at the first expansion position, the cooling power can be exchanged between the two expansion stages. A dynamic model was developed to predict the actual performance of the microcooler. The accuracy of this model was verified through the comparison between experimental and simulation results.

Available documents

Format PDF

Pages: 223-231

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: A micromachined Joule-Thomson cryogenic cooler with parallel two-stage expansion.
  • Record ID : 30018581
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 69
  • Publication date: 2016/09

Links


See other articles in this issue (37)
See the source

Indexing