COGENERATION UNIT, COGENERATION SYSTEM AND METHOD OF OPERATING COGENERATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a cogeneration unit and a cogeneration system with a simple configuration of components, which can be operated with higher energy conversion efficiency (total efficiency) even when a required power generation amount is small and which achieve a higher energy saving effect, and to provide a method of operating the cogeneration system.SOLUTION: A cogeneration unit includes: a power generating means 11 for generating power by use of fuel; an inverter 12 for converting the generated power so that it can be interconnected to commercial power; an exhaust heat recovering means 13 for recovering exhaust heat generated in the power generating means; and an electric heat pump type heating means 20. A heating fluid that is cooling water or a heat medium is made to flow into the exhaust heat recovering means to be heated, and then discharged. To the electric heat pump type heating means, a part of the power generated by the power generating means or a part of the power output from the inverter is supplied to heat the heating fluid prior to flowing into the exhaust heat recovering means by the electric heat pump type heating means.