Thermodynamic systems including gear type machines for compression or expansion of gases and vapors

摘要

PCT No. PCT/NO92/00036 Sec. 371 Date Nov. 17, 1993 Sec. 102(e) Date Nov. 17, 1993 PCT Filed Dec. 16, 1993 PCT Pub. No. WO92/15774 PCT Pub. Date Sep. 17, 1992.Actual thermodynamic processes occurring in a system such as a heat pump or refrigeration plant are made to approach theoretical ideal processes, e.g. an isothermal (To), by use of a multistage gear machine as compressor and/or expander in the system, and conditioning, such as cooling, the system working fluid between successive stages in the machine. The individual stages of the gear machine each include a pair of meshing gears, preferably cylindrical spur gears of equal diameter and diminishing width from stage-to-stage.