Image: China Dongfang Electric Corporation (DEC)
By ESS news
Dongfang Research Institute, a subsidiary of China Dongfang Electric Corporation (DEC), has announced the completion of a 10-day full-scale underwater trial of China’s first submerged energy system with kilowatt-scale pumped storage, marking a step forward in the development of alternative long-term storage technologies in the country.
The system, branded ‘Dongchu No. 1’, was tested in Minhu Lake in Sanming, Fujian Province, at a water depth of 65 meters. The institute said the trial ran from January 2 to 11 and included more than 100 charge and discharge cycles under continuous submerged operation.
According to DEC, the test verified the system’s structural sealing, pressure control, mechanical durability and bidirectional energy conversion performance in a real underwater environment. The company did not disclose specific round-trip efficiency figures, power ratings outside the kilowatt class designation, or detailed cost data.
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