Exhaust heat recovery system

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° 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° C. or so, which is provided for heating, etc. Thereafter, the pressure is lowered to condense the carbon dioxide into liquid phase (approximately 20° 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.

What is claimed is:  
     
         1 . An exhaust heat recovery system for recovering heat otherwise dissipated in a condenser of a steam turbine facility, to obtain warm water, 
 wherein a heat channel of a compression type heat pump is connected with a cooling medium side channel of the condenser, the compression type heat pump directly recovering the heat from the steam turbine facility.    
     
     
         2 . An exhaust heat recovery system according to  claim 1 , wherein carbon dioxide is used as a refrigerant for the compression type heat pump.  
     
     
         3 . An exhaust heat recovery system according to  claim 1 , wherein when heat exchange proceeds in the condenser between steam led from a steam turbine and a refrigerant in the compression type heat pump, a heat transfer mechanism provided at a refrigerant side utilizes boiling heat transfer.  
     
     
         4 . An exhaust heat recovery system according to  claim 2 , wherein when heat exchange proceeds in the condenser between steam led from a steam turbine and a refrigerant in the compression type heat pump, a heat transfer mechanism provided at a refrigerant side utilizes boiling heat transfer.