Experimental Performance of Coil Finned Tube Type Heat Exchanger

It is known that the gas liquefaction system is very crucial part of cryogenics engineering because it is used to produce different cryogens. Heat Exchanger is the most crucial component in cryogenic processes, for improving efficiency and decreasing cost of the whole plant. Coiled finned-tube heat exchangers have been used in small and medium helium refrigerators/liquefiers, miniature J–T refrigeration systems for many years. The efficiency of these cryogenic systems strongly depends on the thermal and pressure drop performance of these heat exchangers. A considerable improvement in the performance of heat exchanger is possible by choosing an appropriate geometrical configuration for a given process requirement. In this work fabrication and experimentation has been carried out. Geometry of heat exchanger has been derived taking into consideration the clearance provided for manufacturing of the heat exchangers. The predictions of four end temperatures from design method have been compared with the actual experimental results of one of the prototypes fabricated in our lab.