Patent ID: 8087251

Claim:
A method of controlling air supply for supplying air into a combustor-accommodating chamber which accommodates a combustor therein after operation of a gas turbine is stopped, the method comprising: obtaining temperature of an upper portion of the combustor-accommodating chamber in a vertical direction and temperature of a lower portion of the combustor-accommodating chamber in the vertical direction; obtaining a difference between the temperature of the upper portion of the combustor-accommodating chamber in the vertical direction and the temperature of the lower portion of the combustor-accommodating chamber in the vertical direction; adjusting an amount of air to be discharged into the combustor-accommodating chamber such that the difference between the temperature of the upper portion of the combustor-accommodating chamber in the vertical direction and the temperature of the lower portion of the combustor-accommodating chamber in the vertical direction falls within a predetermined range; and discharging air into the combustor-accommodating chamber with the adjusted flow rate.