Studies on Fundamental Design of Cryogenic Helium Heat Exchanger

Abstract

In order to facilitate the design of heat exchangers used at cryogenic temperature, a numerical method was tried to heat exchangers of a 4°K helium refrigerator.
Experiment of the helium refrigerator showed that this calculation satisfied prediction of heat transfer area above 10°K. For J-T heat exchanger below 10°K, this calculation was helpful for approaching near to the suitable value, although some correction of heat transfer area was necessary.
With reference to literatures of Collins, Starr, Nagano and others, several numerical methods are also reviewed and compared with the method of this report.