INTAKE AIR COOLING DEVICE FOR GAS TURBINE

摘要

PROBLEM TO BE SOLVED: To provide an intake air cooling device for a gas turbine that can increase total energy efficiency and stably supply electric power by measuring or predicting a load demand and an atmospheric temperature and computing and controlling a proper intake air temperature according to a gas turbine output characteristic. SOLUTION: A cogeneration plant comprises a steam injection type gas turbine 10 as a main engine and an exhaust heat recovery boiler, has the intake air cooling device 11, and uses the variable heat-power cogeneration unit to supply electric power and steam. An atmospheric temperature 17 and a load demand 16 for electric power are measured or predicted, and according to an output characteristic 18 of the gas turbine, an intake air temperature for optimal operation is determined, based on which an intake air temperature is controlled.