The invention relates to a method for operating a gas pressure mechanism comprising a gas turbine, which has a compressor stage, as well as a turbine stage, and with a generator is connected via an axis, whereby the generator is designed for this purpose, also to be operated as a motor, the method including the operation of the generator as a motor for the rotational operation of the axis requires, as well as a simultaneous removal of the heated gas stream emerging from the turbine stage and a supply of the gas stream to a first heat exchanger for the transmission of thermal energy from the gas stream to a heat-exchange fluid, wherein the heat exchange fluid is provided for this purpose, either thermal energy to a heat storage medium is to be delivered or even as a storage medium can be temporarily stored.
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