Dam-free water pumping energy storage system based on retired thermal power plant

Through a damless pumped storage system based on retired thermal power plants, using boilers, turbines and steam turbines to drive generators to generate electricity, the application difficulties of pumped storage technology in drought-scarce or water-scarce areas or areas with long freezing periods have been solved, and costs and cycles have been reduced.

CN120650101APending Publication Date: 2025-09-16SHANGHAI POWER EQUIPMENT RESEARCH INSTITUTE CO LTD
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Patent Information

Application Number
CN202510799527.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-16
Publication Date
2025-09-16

AI Technical Summary

Technical Problem

Pumped storage technology is limited by water resources and geological conditions, with large initial investment and long construction period, making it difficult to promote in areas with drought, water shortage or long freezing periods.

Method used

A damless pumped energy storage system based on a retired thermal power plant is designed. The system utilizes the boiler, water turbine, and steam turbine of the retired thermal power plant. The water and steam in the pressure vessel drive the generator to generate electricity. The system combines an electric heating mechanism and a piston plate structure to achieve energy storage and release.

Benefits of technology

It reduces construction costs and cycles, enables energy storage applications under any geological conditions, and realizes waste utilization by utilizing retired equipment.

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Abstract

The invention belongs to the technical field of energy storage systems, and particularly relates to a dam-free water pumping energy storage system based on an out-of-service thermal power plant. Comprising a pressure container, the lower side wall of the pressure container is provided with a water inlet and a water outlet, the middle side wall of the pressure container is provided with a steam outlet, the water inlet is communicated with a reservoir through a water inlet pipeline, the water inlet pipeline is communicated with a first water pump, the water outlet is communicated with the reservoir through a water outlet pipeline, and the water outlet pipeline is communicated with a water turbine. The steam outlet is communicated with the reservoir through a steam pipeline, the steam pipeline is communicated with a steam turbine, the top end of the pressure container is communicated with a high-pressure gas filling pipeline with a fourth switch valve, and an electric heating mechanism is arranged at the bottom in the pressure container. The system is built based on the decommissioned thermal power plant, the pressure container, the water turbine and the steam turbine all adopt existing equipment in the decommissioned thermal power plant, waste utilization can be achieved, the construction cost is reduced, the construction period is shortened, and the system is not limited by geological conditions.
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