Energy storage power plant and method for operating such a power plant

摘要

An energy storage power plant for harvesting electric energy, and suitable for converting electric energy into thermal energy is provided. The thermal energy can be temporarily stored in at least two thermal stores until demanded and retrieved to increase the energy content of water in a water circuit upon demand. The power plant has the at least two thermal stores, each has at least one converting device that allows electric energy to be directly or indirectly converted into thermal energy, the thermal stores being thermally chargeable by temporarily storing thermal energy, wherein one thermal store is for storing sensible heat and one thermal store is for storing latent heat; and at least one energy generating unit operated using the water in the water circuit, the energy content of the water having been increased by the temporary storage of thermal energy, in order to generate electric energy when operated.

主权项

1. An energy storage power plant for generating electrical power which is suitable for converting electrical energy into thermal energy, wherein the thermal energy can be stored temporarily in at least two thermal storage tanks until it is needed and be retrieved when needed in order to increase an energy content of water in a water circuit, comprising:
at least two thermal storage tanks, each with at least one converting device which enables the electrical energy to be converted into the thermal energy, wherein the at least two thermal storage tanks can be thermally charged by temporarily storing the thermal energy, and wherein a thermal storage tank of the at least two thermal storage tanks is for storing sensible heat and a thermal storage tank of the at least two thermal storage tanks is for storing latent heat, and wherein at least one of the at least two thermal storage tanks has a modular structure comprising modules to charge the at least one of the at least two thermal storage tanks, wherein the at least one of the at least two thermal storage tanks is thermally connected to a heat exchanger, and wherein via the heat exchanger heat can be transmitted from the modules of the at least one of the at least two thermal storage tanks to the water in the water circuit, wherein each of the modules is provided with a respective converting device for converting the electrical energy into the thermal energy, thereby enabling each module to be charged independent of whether other modules are charging, and at least one power generation unit configured to be operated with the water in the water circuit in order to generate electrical power during operation.