Method for changing the thermoelectric ratio of combined power generation facilities for fuel cells and micro gas turbines

摘要

PPROBLEM TO BE SOLVED: To provide a thermoelectric ratio changing method for a fuel cell-micro gas turbine combined power generation facility capable of changing the thermoelectric ratio according to required power output and thermal output, and supplying necessary utility while generating power at high thermal efficiency. PSOLUTION: When generating output P is prioritized, the set generating output PFc of a fuel cell is preferentially set to constantly keep its actual generating output Pfc' at the set generating output Pfc, the set generating output Pgt of a micro gas turbine is set to the remainder, and the rotating speed N of the micro gas turbine is controlled to feedback-control its actual generating output Pgt' to the set generating output Pgt. When thermal output S is prioritized, an excess vapor flow adjusting valve 34 is controlled, and the reduction in vapor pressure P is detected to start the thermal output control of the micro gas turbine to control the turbine inlet temperature TIT. PCOPYRIGHT: (C)2004,JPO