Abstract
This paper describes the feasibility study of the regenerative cryocooler operating directly by the hydride absorption compressor. The gas compression parts of the split Stirling or Vuilleumier cycle could be replaced with the gas absorption compressor, if the pressure response of the absorption compressor is high enough to drive the regenerative cryocooler directly. Our simplified theory indicate that the pressure response of the order of seconds could be obtained by increasing the heat transfer area keeping heat capacity of the hydride and the wall material constant. We found a number of flattened capillary tubes as the hydride receptacle was suitable to the high response hydride compressor system. As the experimental results of this compressor system connected with pneumatic controlled expander, the minimum temperature of 95K was obtained when the heating and cooling temperature of the hydride receptacle was 90 and 20°C, and the cycle frequency of 0.5Hz.
