lately, the anhui provincial energy administration approved the molten salt energy storage project of the anhui branch of chn energy as a technological innovation project that can replace electrochemical energy storage of 70mw or 140mwh. it is considered the first molten salt energy storage project for electrochemical energy replacement in china.
the suzhou power plant of the anhui branch of chn energy
as a scientific and technological innovation project jointly launched by the anhui branch of chn energy and the guodian institute of new energy technology, the project is planned to be implemented in the suzhou power plant and develop a molten salt heat storage system with a capacity of 1,110mwh. the project adopts the high- and low-temperature double tank molten salt energy storage system, using molten salt as the medium to store heat. when the power grid needs peak shaving, the abundant steam of the boiler is pumped out by steam extraction, and the heat is stored in the high-temperature molten salt tank, thus realizing the decoupling and peak regulation of the boiler and the steam turbine generators and making room for new energy power generation. when the demand of the power grid peaks, the heat stored in the high-temperature molten salt during peak shaving can be re-released, increasing the output of the generation units. through energy storage and conversion in different periods of time, the system can improve the peak-shaving flexibility of the generation units.
it is estimated that the system can enable the peak capacity of two 350,000-kilowatt heating supply units of the suzhou power plant to reach the highest rated load of power generation, and meet the requirements of 220 tons/hour steam supply for four successive hours and 360 tons/hour maximum heat supply for nine consecutive hours. through the application of the technology, the project can save 60,000 tons of standard each year, creating remarkable social and economic benefits. at present, the project’s technical feasibility has been verified at the expert evaluation meeting and is scheduled to be put into use by the end of 2024.