Patent ID: 8776497

Claim:
A cogeneration system comprising: a fuel evaporator that evaporates a liquid fuel; an internal combustion engine which outputs mechanical energy by combusting the fuel evaporated by the fuel evaporator; an electric energy generator that converts the mechanical energy to an electric energy; a cold energy recovery portion which recovers cold energy generated when the fuel evaporator evaporates the fuel; an exhaust heat recovery portion which recovers heat exhausted from the engine when the engine combusts the fuel; a gas cleaner that cleans nitrogen oxides contained in gas exhausted from the engine when the engine combusts the fuel, wherein the fuel reduces the nitrogen oxides by reacting with the nitrogen oxides when the fuel is supplied to the gas cleaner; and a heat storing portion including a heat emitting agent that chemically reacts with the fuel and emits heat, the heat emitting agent having a reversible reaction with the fuel, wherein the fuel generates reaction heat when the fuel is supplied to the heat storing portion, the reaction heat is supplied to at least one of the internal combustion engine and the fuel evaporator, and the heat emitting agent is reproduced when the heat exhausted from the engine is supplied to the heat storing portion.