Patent ID: 6196020
Filing Date: 2001-03-06
Classification: F02C,F25B,F28D

Abstract:
A rotary machine that can be used as at least one of a motor, a refrigeration machine, and a heat pump, said rotary machine comprising:a rotor through which both a working medium and a heat carrying fluid are directed during mutual heat exchange, said rotor comprising a compressor, a heat exchanger and an expander;means for directing the working medium through the heat exchanger in a first direction; andmeans for directing the heat carrying fluid through the heat exchanger in a second direction opposite to said first direction;wherein the working medium is first directed radially outwards through the compressor, then axially through the heat exchanger, and finally radially inwards through the expander; andwherein the mutual heat exchange between the working medium and the heat carrying fluid is substantially carried out under constant pressure in the heat exchanger, where the working medium and the heat carrying fluid are directed in counter current flow.