Thermoelectric type compressed air energy storage system and method adopting thermoelectric unit for steam extraction and heat storage

Abstract

The invention discloses a thermoelectric type compressed air energy storage system and method adopting a thermoelectric unit for steam extraction and heat storage, and the system is formed by introducing an electric heating module and a steam heating module on the basis of adiabatic compressed air energy storage. The system is coupled with a combined heat and power unit and a wind turbine unit, thermoelectric decoupling of the combined heat and power unit can be achieved, wind power fluctuation can be effectively stabilized, and energy grade matching can be carried out on the macroscopic level to improve efficiency. The method has important scientific significance and practical value in the aspects of novel power system construction, dual-carbon target realization and the like.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of energy, and in particular relates to a thermoelectric compressed air energy storage system and method using steam extraction and heat storage of a thermoelectric unit. Background technique [0002] In recent years, wind power technology has developed rapidly and has become the fastest-growing renewable energy utilization method in the world. However, wind power has the characteristics of intermittent, fluctuating and anti-peaking, and its large-scale grid connection will cause serious damage to the power system. Serious impact; In addition, there is a difference in the spatial distribution of wind power production and load demand, which leads to difficulties in power delivery and limited local consumption capacity, making the phenomenon of "abandoning wind and curtailing power" common in a large area, and seeking support for large-scale wind power energy consumption Technology is urgent...

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Problems solved by technology

On the one hand, for the geological conditions of a specific gas storage volume, the introduction of a thermoelectric compressed air energy storage system with an electric heating unit can effectively increase the energy storage capacity / power level, and reduce the influence of geological structure conditions and rotating machinery design and manufacturing levels on the system. However, the advantages of the system's strong heat storage capacity in heating have not been brought into play, and the waste heat from the high-temperature turbine exhaust in the energy release stage has not been utilized

On the other hand, from the perspective of the system, the existing thermoelectric decoupling technology of combined heat and power units is only the transformation of the unit itself, lacking the coupling with the extremely important energy storage system in the new power system, which restricts the overall performance improvement of the power system

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