The world’s largest compressed air energy storage power plant is already under construction, led by China’s Huaneng Group.
Located in salt caves, it will add two 350 MW energy storage units without the need for additional combustion, marking a key milestone in energy storage advancements in China.
Project Details
The project includes the construction of two units with a total volume of 1.2 million cubic meters of compressed air, making it the largest in unit capacity, storage volume, and efficiency.
Designed to operate 330 annual charge and discharge cycles, these units will store electricity by compressing air in underground salt caves during off-peak hours and releasing it during peak demand to generate electricity.
Once completed, the project will have the capacity to store 2.8 million kilowatt-hours per charge, equivalent to powering up to 100,000 electric vehicles. This system will save 270,000 tons of standard coal per year and reduce carbon dioxide emissions by 520,000 tons.
Benefits and Efficiency of Compressed Air Storage
The compressed air energy storage station offers high capacity, long storage time (over 4 hours), and efficient response, according to Liu Yong, Secretary-General of the Energy Storage Application Branch of the China Industrial Energy Sources Association.
The system operates without combustion, produces zero carbon emissions, and has a lifespan of up to 50 years, offering greater storage duration, extended lifespan, lower life cycle cost, and improved safety compared to other energy storage technologies.
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