Temperature control device, gas turbine, temperature control method, and program

A temperature control method comprising:

• a temperature difference calculation step of calculating a temperature difference between an inlet and an outlet of a boost compressor on the basis of a pressure ratio of the inlet and the outlet of the boost compressor and an IGV opening degree of the boost compressor, the boost compressor outputting cooling air obtained by cooling compressed air from a compressor to a cooling target;
• a temperature information calculation step of calculating temperature information for feedback control for at least one of the inlet and the outlet of the boost compressor on the basis of the temperature difference between the inlet and the outlet of the boost compressor;
• and
• a control step of performing feedback control by using the temperature information for feedback control such that at least one of an inlet temperature and an outlet temperature of the boost compressor approaches a setting value.

A program causing a computer to execute:

• a temperature difference calculation step of calculating a temperature difference between an inlet and an outlet of a boost compressor on the basis of a pressure ratio of the inlet and the outlet of the boost compressor and an IGV opening degree of the boost compressor, the boost compressor outputting cooling air obtained by cooling compressed air from a compressor to a cooling target;
• a temperature information calculation step of calculating temperature information for feedback control for at least one of the inlet and the outlet of the boost compressor on the basis of the temperature difference between the inlet and the outlet of the boost compressor;
• and
• a control step of performing feedback control by using the temperature information for feedback control such that at least one of an inlet temperature and an outlet temperature of the boost compressor approaches a setting value.