Patent ID: 7900455

Claim:
A method for operating a pressure accumulator plant, wherein the pressure accumulator plant comprises: a gas turbine set, a storage volume for a stored fluid which is under pressure, a stored fluid expansion machine, and a heat exchanger through which exhaust gas from the gas turbine set can flow on a heat-emitting side and whose heat-receiving side is arranged in a flow path from the storage volume to the expansion machine, and which method comprises: placing the gas turbine set at an operational speed; synchronizing a generator of the gas turbine set with an electric power network and operating the gas turbine set to output power into the electric power network; and applying stored fluid and exhaust gas from the gas turbine set to the heat exchanger and making available heated stored fluid for the stored fluid expansion machine, wherein the temperature of the stored fluid which is made available for the expansion machine is controlled independently of the power output of the gas turbine set, but as a function of the thermal state of the expansion machine.