Exhaust heat recovery system
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United States of America Patent
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Issued Date -
Dec 2, 2004
app pub date -
Mar 18, 2004
filing date -
Feb 18, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
In a condenser of a steam turbine facility, which conventionally releases exhaust heat thereof into the ocean or the air, liquid carbon dioxide (approximately 20.degree. C., approximately 5.7 MPa), instead of the ocean water or air as conventionally used, is used as a cooling medium, and heat recovery is carried out utilizing boiling heat transfer having high heat-removing performance. Gaseous carbon dioxide resultantly generated is directly used as an operational heat medium of a heat pump, and a pressure thereof is raised to 12 MPa or so, thereby a temperature thereof is raised to recover heat of 80.degree. C. or so, which is provided for heating, etc. Thereafter, the pressure is lowered to condense the carbon dioxide into liquid phase (approximately 20.degree. C., approximately 5.7 MPa), and is used for cooling in the condenser again. Accordingly, exhaust heat can be recovered and recycled economically, and restricted from being released to an outside environment.
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