Cogeneration system

A cogeneration system in which a refrigerating machine is driven by using exhaust heat of a gas turbine generator, and cold generated by said refrigerating machine is used for cooling intake air for said gas turbine generator and as a cold source for an air conditioner, wherein

• said system comprises a thermal storage tank for storing the cold generated by said refrigerating machine and an electric energy storage equipment for storing electric energy generated by said gas turbine generator;
• an electric power load of said gas turbine generator and a load of said air conditioner are detected;
• when it is judged that the capacity of said gas turbine generator is insufficient and the capacity of said air conditioner is in surplus, said intake air cooling is performed and said thermal storage and electric energy storage are stopped;
• when it is judged that the capacity of said air conditioner is insufficient and the capacity of said gas turbine generator is in surplus, said electric energy storage is performed and said intake air cooling and thermal storage are stopped;
• when it is judged that the capacities of both of said air conditioner and said gas turbine generator are in surplus, said thermal storage and electric energy storage are performed and said intake air cooling is stopped;
• and
• when it is judged that the capacities of both of said air conditioner and said gas turbine generator are insufficient, said thermal storage and electric energy storage are stopped, and said intake air cooling is performed by using stored heat.