Construction of the world's largest compressed air energy storage facility has reached a critical milestone, with workers completing excavation of a 1,037-meter inclined shaft in April 2026. The $450 million project, now entering its main cavern construction stage, represents a technological leap for renewable energy storage in Asia and beyond.
When operational in late 2027, the facility will store enough compressed air in underground salt caverns to generate 2 billion kWh annually – equivalent to powering 800,000 households. Environmental analysts project it will reduce regional carbon emissions by 1.6 million metric tonnes yearly, supporting climate commitments made at last year's COP31 summit.
'This underground solution addresses two critical challenges,' said project engineer Li Wei during a site tour. 'First, stabilizing power grids overwhelmed by solar and wind fluctuations. Second, repurposing depleted salt mines into clean energy infrastructure.'
The development comes as the Chinese mainland accelerates its transition to renewable energy, with compressed air storage emerging as a key component in national plans to achieve 80% non-fossil fuel electricity by 2035. Similar projects are being considered across Northeast Asia's industrial corridors.
