Fluid Machine

Abstract

A fluid machine which can be compact and produced at reduced costs and which can increase the amount of heat added to a refrigerant circulating in a Rankine cycle and thus greatly increase the efficiency of the Rankine cycle. A fluid machine ( 1 ) comprising a pump mechanism ( 46 ) incorporated in a Rankine cycle to force a working fluid to circulate in the Rankin cycle to recover waste heat from a heat source, and an expansion mechanism ( 48 ) rotationally driven by expansion of the working fluid having been forced out by the pump mechanism ( 46 ) and then superheated, the pump mechanism and the expansion mechanism being linked by a shared drive shaft ( 50 ), wherein a pump mechanism exit section ( 76 a) through which the refrigerant flows out of the pump mechanism ( 46 ) and an expansion mechanism exit section ( 76 b) through which the refrigerant flows out of the expansion mechanism ( 48 ) are open outward in the same direction.

1 . A fluid machine comprising a pump mechanism incorporated in a Rankine cycle to force a working fluid to circulate in the Rankin cycle to recover waste heat from a heat source, and an expansion machine for producing rotary drive power by expansion of the working fluid having been forced out by the pump mechanism and then superheated, the pump mechanism and the expansion mechanism being linked by a shared drive shaft, wherein a pump mechanism exit section through which the refrigerant flows out of the pump mechanism and an expansion mechanism exit section through which the refrigerant flows out of the expansion mechanism are open outward in the same direction. 
     
     
         2 . The fluid machine according to  claim 2 , further comprising an exit port member connected to both the pump mechanism exit section and the expansion mechanism exit section. 
     
     
         3 . The fluid machine according to  claim 2 , wherein the exit port member has a pump mechanism exit passage and an expansion mechanism exit passage extending close to each other with a partition with a specified thermal conductivity interposed between, the pump mechanism exit passage and the expansion mechanism exit passage being connected to the pump mechanism exist section and the expansion mechanism exit section, respectively. 
     
     
         4 . The fluid machine according to  claim 3 , wherein the pump mechanism exit passage and the expansion mechanism exit passage of the exit port member form a double pipe configuration functioning as an internal heat exchanger.