Study of 35 K Regenerator Performance Operating at High Frequency

Presented at the 16th International Cryocooler Conference, held May 17-20, 2008 in Atlanta, Georgia.The objective of this paper is to observe the regeneration performance of three different regenerator materials including stainless steel screen, lead screen and lead sphere at 35 K and at a high operating frequency. A systematic comparison of the three different materials’ performance including effects of COP, the pressure ratio and the cold-end temperature was carried out using REGEN3.2. Calculation results indicate that the performance of stainless steel screen is better than that of lead sphere and #500 mesh stainless steel screen satisfies the design requirement of a regenerator at a frequency of 40 Hz and a low pressure ratio at 35 K. Moreover, lead screen matrix performs best at 20 K; #500 mesh lead screen has a COP double that of a stainless steel scree