Combined heat and power unit including multiple power generation units

摘要

PROBLEM TO BE SOLVED: To restart a cogeneration apparatus with no problem that for generating power and heating fluid via heat exchanger by engine exhaust heat while responding to varying power demand by combining multiple generating units consisting of an engine and generator, and changing the number of operated generating units even if some of the generating units are suspended in a cold area.SOLUTION: An engine preheating unit for preheating the engine of the suspended generating unit by at least some exhaust from the engine of the generating unit in operation is provided.