Experimental and Computational Studies of Heat Transfer for Wall-type and Fin-type Heat Exchanger

Wall-type heat exchangers (WTHX) and fin-type heat exchangers (FTHX) are attached to the first and second stage cold head of two G-M crycoolers respectively in the simulating experimental platform of the internal purifier (SEPEIP). WTHX and FTHX play a significant role in SEPEIP, WTHX is designed to remove heat from helium and freeze-out extremely few impurities, FTHX is for further cooling the helium. In this study, numerical simulation and experimental results for WTHX and FTHX are carried out. According to the comparison, the numerical results have a little discrepancy with the experimental results. However, the discrepancy is within the acceptable level. Finally, it is observed that the WTHX and FTHX are suitable to apply in the experimental system and are capable of guaranteeing a purifying function. (paper)