Patent ID: 6880535

Claim:
A cogeneration system for supplying distributed generation of electricity and process/utility heat to a cogeneration client driven by a natural gas fired, internal combustion engine using EGR and having a carburetion system and an engine cooling/heat transfer system, with reduced fuel consumption and pollutants, while delivering substantially increased heat to the process/utility heat facility comprises: a. a carburetion system comprising: i. at least one recycled exhaust gas venturi for admixing intake air and recycled exhaust from said engine; and, ii. at least one fuel venturi, downstream of said recycled exhaust gas venturi, for admixing fuel and the confluent from said recycled exhaust gas venturi wherein said venturi are in a spaced apart relationship, proximate one to another, to provide an effective amount of exhaust gas to be admixed with said intake air prior to entering the fuel venturi, to maintain the engine operation at substantially stoicheiometric through out the engine range while reducing pollutants; and, b. a heat transfer and cooling system comprising: i. a fluid system for cooling said internal combustion engine having a first loop containing a cooling fluid which fluidly communicates with the cooling ports of said internal combustion engine at a first inlet temperature and a first flow rate; and, a second loop containing a cooling fluid which fluidly communicates with the cooling ports of at least one exhaust manifold of said internal combustion engine at a second inlet temperature and a second flow rate, wherein the cooling fluid exiting said first loop at a first exit temperature and the cooling fluid exiting said second loop at a second exit temperature second loop converge in a confluence at one or more process heat exchanger; and, ii. a cogeneration process/utility heat loop containing a heat receiving medium and in communication with said at least one process heat exchanger containing said confluence from said cooling system such that heat contained in said confluence from said cooling system is passed to the media of said cogeneration process/utility heat loop to provide process/utility heat.