Energy storage device for temporary storage of thermal energy, power plant with an energy storage device and method for operating an energy storage device

摘要

The invention relates to an energy storage device (1) for temporary storage of thermal energy. In this case, a closed storage circuit (2) is provided to which by means of a heat source (14) heat supplied and by a heat consumer (12) heat can be removed and in which a fluid container (3) is present, by means of a displaceable separating element (6) in a first A fluid storage chamber (7) for colder fluid and a second fluid storage chamber (8) is divided for warmer fluid, wherein in the storage circuit (2) at least one pump (11) is provided, by means of which fluid from the first fluid storage chamber (7) into the second fluid storage chamber (8) and / or the other way round. The invention further relates to a power plant and to a method for operating an energy storage device (1).