Cryogenic refrigeration using a low temperature heat source

A non mechanical gas sorption refrigeration system which could be powered by a low temperature heat source was designed and analysed. The system involved no sealing, no mechanical moving parts and no active control. The system was analysed using a 1 W cooling load at 74 K as an example. It was found that the new system was competitive with a passive radiator and superior to a solid cryogen system.