Review of experimental research on Joule–Thomson cryogenic refrigeration system

http://repository.kulib.kyoto-u.ac.jp/dspace/bitstream/2433/193247/1/j.ijmultiphaseflow.2014.11.010.pdf

Measurements of liquid film and droplets of annular two-phase flow on a rod-bundle geometry with spacer

The performance of the mixed refrigerant (MR) Joule–Thomson cooler is mainly dependent on the MR circulation composition for a given hardware. However, it is difficult to charge the MR to the desired circulation composition, due to the composition shift. In the present study, a novel strategy was proposed to solve this problem. In this strategy, the MR Joule–Thomson cooler is first charged with the initial charge amount, which is obtained by estimating the MR inventory in the cooler using the homogeneous model. Afterwards, the cooler is started and the MR circulation composition is adjusted to the corresponding optimal composition by adding the MR charge amount stepwise. Additionally, this strategy was verified by an experiment with a ternary mixture of methane, ethane and i-butane. The experimental results indicated that the MR circulation composition was able to be adjusted to the corresponding optimal circulation composition approximately within the relative deviation of ±5%.

K. Rajesh Reddy

Papers

Effect of spacer grids on CHF in nuclear rod bundles

Relationship between the cooldown characteristics of J-T refrigerators and mixture composition