Stationary engine coolant circuit

Abstract

The present invention has a waste heat recovery device ( 37 ) that supplies engine waste heat by way of engine coolant; a radiator ( 18 ) that dissipates engine waste heat by way of engine coolant; an exhaust gas heat exchanger ( 33 ) that supplies engine waste heat from exhaust gas to engine coolant; and a coolant pump ( 32 ) that causes engine coolant to circulate. Furthermore, the constitution is such that pressure drop equipment ( 34 ) is arranged upstream with respect to a coolant pump suction region ( 32 b ); a restrictor is arranged in a communication passage ( 50 ) between a coolant pump suction region and a region ( 20 ) vented to atmosphere; a location upstream with respect to the pressure drop equipment is made to communicate with the region vented to atmosphere; and the region vented to atmosphere is made capable of being kept in communication with atmosphere.

1 . A stationary engine coolant circuit having a waste heat recovery device that supplies engine waste heat by way of engine coolant; a radiator that dissipates engine waste heat by way of engine coolant; an exhaust gas heat exchanger that supplies engine waste heat from exhaust gas to engine coolant; and a coolant pump that causes engine coolant to circulate,
 the stationary engine coolant circuit being characterized in that it is constituted such that pressure drop equipment is arranged upstream with respect to a coolant pump suction region, and two of the coolant tanks are provided; a vent pipe capable of being kept in communication with atmosphere being provided at one of the tanks; and further, an air pocket region at the one tank being made to communicate with an air pocket region at the other tank; a location upstream with respect to the pressure drop equipment being made to communicate with a watersealed region at the other tank; and a restrictor being arranged in a coupling passage between the location upstream with respect to the pressure drop equipment and the watersealed region.   
     
     
         2 . A stationary engine coolant circuit according to  claim 1 , the stationary engine coolant circuit being characterized in that the exhaust gas heat exchanger is arranged at a location that is at a discharge side of the coolant pump and that is downstream with respect to the engine. 
     
     
         3 . A stationary engine coolant circuit according to  claim 1 , the stationary engine coolant circuit being characterized in that a motor-driven three-way valve having an adjustable opening is arranged at a region where a radiator downstream passage and a waste heat recovery device downstream passage meet. 
     
     
         4 . A stationary engine coolant circuit according to  claim 1 , the stationary engine coolant circuit being characterized in that a thermostat is arranged at a discharge side of the coolant pump; the waste heat recovery device is arranged at a passage on a high-temperature side of said thermostat; and a radiator is arranged at a location downstream with respect to the waste heat recovery device. 
     
     
         5 . (canceled) 
     
     
         6 . (canceled)