Refrigeration – Utilizing solar energy
Patent
1982-08-12
1984-08-14
King, Lloyd L.
Refrigeration
Utilizing solar energy
622384, 62501, F25B 2700
Patent
active
044649088
ABSTRACT:
The turbocompressor comprises a power turbine (14) and a compressor turbine (16) having respective rotors (18) and (20) on a common shaft (22), rotatably supported by bearings (26) and (28). A first working fluid is supplied by a power loop (32) and is expanded in the turbine (14). A second working fluid is compressed in the turbine (16) and is circulated in a heat pump loop (70). A lubricant is mixed with the second working fluid but is excluded from the first working fluid. Bearings (26) and (28) are cooled and lubricated by a system which circulates the second working fluid and the intermixed lubricant through the bearings (26) and (28). Such system includes a pump (126), a thermostatic expansion valve (150) for expanding the working fluid into the space (152) between the bearings (26) and (28), and a return conduit system (154, 156, 158) for withdrawing the expanded working fluid after it passes through the bearings and for returning the working fluid to the evaporator (82). A shaft seal (30) excludes the lubricant from the power turbine (14). The power loop (32) includes a float (208) operable by liquid working fluid in the condenser (46) for controlling a recirculation valve (206) so as to maintain a minimum liquid level in the condenser, while causing a feed pump (48) to pump most of the working fluid into the vapor generator (34). The heat pump compressor loop (70) includes a float (222) in the condenser (78) for operating an expansion valve (88) to maintain a minimum liquid working fluid level in the condenser (78) while causing most of the working fluid to be expanded into the evaporator (82).
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Anderson Torger J.
Biancardi Frank R.
Kepler Charles E.
Landerman Abraham M.
Meader Maurice D.
Carnahan L. E.
Esposito Michael F.
Gaither Roger S.
King Lloyd L.
The United States of America as represented by the United States
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