JPS5788206A - Refrigerating equipment - Google Patents

Abstract

PURPOSE: To employ high temperature working fluid to enhance the driving efficiency by a method wherein a closed Brayton cycle is employed as the driving source of a refrigerant compressor and an expander used in said cycle is rendered to be of velocity type with no friction part.

CONSTITUTION: With the start of the running of a displacement type compressor 1, the working fluid is compressed and discharged from a port 21 and then heated up to high temperature with a heater 2. After that, said high temperature high pressure working fluid is introduced from a port 22 to the velocity type expander 4 to rotate and drive the expander by lowering its temperature and pressure. Said working fluid decreased in temperature and pressure is cooled with a radiator 5 and, after that, sent back to the displacement type compressor 1 to repeat the recirculation. According to Brayton cycle as described above, the displacement type compressor 1 and the displacement type refrigerant compressor 8 are driven by the high speed rotational output of the velocity type expander 4 through a low speed rotary shaft 13 reduced its speed with a reduction gear 14.

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