The first phase of Shouhang Dunhuang solar thermal power generation project, Shouhang Dunhuang 10MW CSP Tower Plant has been performed well. In July, the generation capacity reached 2021280kWh, the steam turbine started for a total of 11 times, the maximum power generation was 10.1MW, and the longest continuous power generation time reached 133 hours.
According to Wenbo Huang, vice chairman of Beijing Shouhang IHW Resources Saving Technology Co., Ltd, in the 7 cloudy days of July, the power station collected heat on the cold salt in some periods; in the 5 complete cloudy days, the power station didn’t collect heat on salt. In the remaining 19 sunny days, all the molten salt was transferred onto the tower for heat-collecting. Within this month, the hot salt was heated for a total of 151 hours and the cold salt for 44 hours.
Ground of the first phase project of Shouhang Dunhuang solar thermal power generation project was broken in August 2014 and became officially operational on December 26, 2016. According to Huang, the climate change of Dunhuang, the increasing cloud volume posted challenge to the concentrating and collecting of the solar field. However, the power generation of the plant has been steadily improved against the backdrop and the performance indicator of each system is close to its designed one since its operation.
In 2017, the year of complete power generation, the annual power generation of the power station reached 10.67 million kWh. After the output test, the power generation reached the designed 10MW, and outlet temperature of the receiver reached the designed 565°C. All the systems have met the designed standard and the actual power generation has reached 97% of the designed indicator.
The project with 15h energy storage system is the first tower CSP project with such a long storage period in China. It is the third in the world and the first in Asia to achieve 24-hour continuous power generation.