HEAT RECOVERY APPARATUS AND COGENERATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To improve the total heat efficiency without dissipating useless heat. SOLUTION: Waste heat from a gas engine 1 is recovered in a first heat exchanger 5, and when there is no need of supplying it to a heating load 2, a hot medium from the gas engine 1 is bypassed from the first heat exchanger 5 through a first bypass piping 7 to eliminate useless heat dissipation in the first heat exchanger 5. Further, a flow rate of the hot medium flowing through a second heat exchanger 12 is controlled to be mixed with a hot medium flowing through a second bypass piping 14, whereby return temperature of the hot medium to the gas engine 1 is lowered for prevention of supercooling.