BEIJING-- (BUSINESS WIRE)--The world's first 300 MW compressed air energy storage (CAES) demonstration project, "Nengchu-1," was fully connected to the grid in Yingcheng, central China's Hubei Province on Thursday, marking the official commencement of commercial operations for the. . BEIJING-- (BUSINESS WIRE)--The world's first 300 MW compressed air energy storage (CAES) demonstration project, "Nengchu-1," was fully connected to the grid in Yingcheng, central China's Hubei Province on Thursday, marking the official commencement of commercial operations for the. . BEIJING-- (BUSINESS WIRE)--The world's first 300 MW compressed air energy storage (CAES) demonstration project, "Nengchu-1," was fully connected to the grid in Yingcheng, central China's Hubei Province on Thursday, marking the official commencement of commercial operations for the power station. . A 300 MW compressed air energy storage (CAES) power station utilizing two underground salt caverns in central China's Hubei Province was successfully connected to the grid at full capacity, making it the largest operating project of the kind in the world. A landmark CAES power station utilizing two. . Inside, air is compressed and cooled to -194 degrees Celsius (-317 Fahrenheit), and then it becomes liquid. When released, it expands by more than 750 times, drives turbines and generates electricity. This is the world's largest liquid-air energy storage plant. An aerial view shows of rows of solar panels delivering green electricity on the Gobi Desert. Zhou Xupeng/VCG via Getty Images China is set to start operating the. . The world's first 300MW/1800MWh advanced compressed air energy storage national demonstration power station in Feicheng, Shandong province. [Photo provided to chinadaily. The expansion includes two 350 MW non-combustion compressed air energy storage units with a total volume of. .