Energy storage device based on hydrogen-steam turbine compound cycle

Abstract

An energy storage device based on a hydrogen-steam turbine compound cycle in the technical field of energy storage comprises a condenser, a pump, an electrolysis unit, a gas turbine unit and a steam turbine which are sequentially connected in series to form a cycle system, wherein the gas turbine unit comprises a gas heat exchanger mechanism, a gas turbine mechanism and a hydrogen and oxygen combustion chamber; a gas inlet of the gas heat exchanger mechanism is connected with the electrolysis unit; a gas outlet of the gas heat exchanger mechanism is connected with the gas turbine mechanism; a gas outlet of the gas turbine mechanism is connected with the hydrogen and oxygen combustion chamber; a gas outlet of the hydrogen and oxygen combustion chamber is connected with the steam turbine; the gas heat exchanger mechanism is located inside the hydrogen and oxygen combustion chamber. The energy storage device based on the hydrogen-steam turbine compound cycle has the advantages of being high in energy storage density and electric energy reduction efficiency, small in system size and the like, and can provide guarantees for large-scale application of clean energy.

Description

technical field [0001] The present invention relates to technologies in the field of energy storage technology, in particular to an energy storage device based on a hydrogen-steam turbine compound cycle. Background technique [0002] my country is the world's largest energy consumer. At present, the development of new energy has become a national strategy, and clean and low-carbon energy is an important development direction. Wind energy and solar power generation can meet the requirements of low-carbon and environmental protection, and occupy an important position in new energy. Due to changes in electricity consumption and natural environmental factors throughout the day, there are large fluctuations in the power provided by this type of energy. This kind of power supply fluctuation not only poses a threat to the safety of the grid operation, but also cannot meet the needs of large-scale industries and modern cities. Therefore, energy storage technology has become one of ...

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Problems solved by technology

The structure of the energy storage device of this technology is complex. The hydrogen produced by electrolysis needs to go through two chemical reactions in the hydrogen storage device before it can be used for heat generation and power generation, and the oxidation and reduction reactions in the hydrogen storage tank need to be strictly controlled. It can only be carried out under certain temperature conditions, which further reduces the energy utilization efficiency of the device

On the one hand, the second condenser in this technology is used as a cooling place for decomposing high-temperature steam / hydrogen in the hydrogen storage tank, and at the same time, it is responsible for cooling the outlet steam of the steam turbine to maintain the outlet vacuum necessary for the operation of the steam turbine, which is technically difficult to realize Very high and tends to reduce the overall life of the device

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