DgcityThe world’s largest liquid-air energy storage station has begun operating on the edge of the Qinghai desert, a test of whether one of the less familiar storage technologies can help China hold onto the flood of renewable power generated in its arid northwest.
The 60-megawatt facility in Golmud was connected to the grid at the end of October, with a storage capacity of 600 megawatt-hours, enough to discharge at full power for up to ten hours. It was developed by China Green Development Investment Group together with the Chinese Academy of Sciences.
Liquid-air storage works almost like a giant thermodynamic battery. When wind and solar generate more power than the grid needs, surplus electricity cools air to around minus 194 degrees Celsius until it turns liquid. At times of high demand, the liquid is warmed and expands sharply, spinning turbines that feed electricity back into the network.
The station is designed to absorb roughly 600,000 kilowatt-hours of renewable power each day and deliver about 180 million kilowatt-hours a year. It is paired with a 250-megawatt solar installation on the same plateau landscape.
The appeal is clear for a country scaling renewables faster than any other. The system uses no lithium, cobalt or nickel, sidestepping battery-mineral supply concerns, and unlike some compressed-air storage it does not depend on special underground caverns. That means plants could in principle be built close to wherever long-duration storage is needed.
The technology is not entirely new. Smaller liquid-air demonstration plants have run for years in Britain, but nothing on the scale of Golmud has operated inside a live power system. That makes the Qinghai station a commercial proving ground as much as a power plant: its operators will publish performance data on availability, response times and maintenance that planners elsewhere will watch closely.
Questions remain over round-trip efficiency, construction costs and whether the technology can compete commercially at scale, which is why projects of this size matter. China’s northwest already wastes a share of its wind and solar output because grids cannot absorb every surge. If Golmud performs, long-duration liquid air could become another tool for matching desert sunshine and wind to the evening needs of cities thousands of kilometers away.
