Gas turbine exhaust heat recovery plant

A gas turbine exhaust heat recovery plant comprising:

• a plurality of gas turbine exhaust heat recovery devices, each gas turbine exhaust heat recovery device having
• a gas turbine, and
• an exhaust heat recovery boiler for generating steam by recovering exhaust heat of the gas turbine;
• a steam-utilizing facility that utilizes the generated steam;
• and
• an inter-device heat medium supply unit capable of supplying a portion of water heated or a portion of the steam generated by at least one of the gas turbine exhaust heat recovery devices, to at least one of the other gas turbine exhaust heat recovery devices and the steam-utilizing facility, the inter-device heat medium supply unit including a valve and a pipeline,
• wherein when a portion of the plurality of gas turbine exhaust recovery devices is in an operation state, a remaining portion of the plurality of gas turbine exhaust heat recovery devices is in a non-operation state,
• the inter-device heat medium supply unit supplies the water heated by a gas turbine exhaust heat recovery device which is in the operation state, via the valve and the pipeline, to the exhaust heat recovery boiler of a gas turbine exhaust heat recovery device which is in the non-operation state, and
• wherein the inter-device heat medium supply unit supplies the steam generated by the gas turbine exhaust heat recovery device which is in the operation state, to an evaporator of the exhaust heat recovery boiler of the gas turbine exhaust heat recovery device which is in the non-operation state, via a superheater or a reheater of the exhaust heat recovery boiler of the gas turbine exhaust heat recovery device which is in the non-operation state.