The water filling test for the high and low temperature molten salt tanks in the China Power Construction Toksun 100MW solar thermal project has been completed

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The filling test of the high and low temperature molten salt tanks for the 100MW concentrated solar power project in Toksun, undertaken by China Power Construction, was completed on 2025-12-08. Recently, the filling test of the high and low temperature molten salt tanks as part of the 100MW concentrated solar power EPC project under construction by China Water Resources and Hydropower First Engineering Bureau Co., Ltd. in Wusitong, Toksun County, Turpan City, was successfully carried out and met all the expected objectives, thus coming to a successful conclusion. This breakthrough at this critical stage not only laid a solid foundation for the further progress of the project, but also fully demonstrated the EPC brand’s advantages in terms of speed, quality assurance, and efficient project execution in construction work. The capacity of this photothermal plant is 100 MW, and the site is equipped with one set of molten salt storage tanks, comprising one high-temperature molten salt tank and one low-temperature molten salt tank. Among them, the high-temperature molten salt tank is made of A240 347H stainless steel; it has a diameter of 31.5 meters and a height of 14.5 meters, with a designed operating temperature of 560℃ ； The low-temperature molten salt tank is made of A516 Gr.70N carbon steel; it has a diameter of 31 meters and a height of 14.5 meters, with an operating temperature of 290°C. The two storage tanks can hold a total of 20,000 tons of mixed molten salt consisting of potassium nitrate and sodium nitrate, with a heat retention time of up to 8 hours, providing essential support for the continuous operation of the power plant. As a key project aimed at improving the local ecological environment and promoting green economic development, it has faced various challenges since its inception, including complex terrain and harsh climate conditions. All members of the project team faced challenges head-on and overcame difficulties, always adhering to the core principle of \"higher quality and stronger performance in fulfilling commitments.\" Upholding the corporate spirit of \"constant self-improvement and a willingness to exceed expectations,\" they pursued the project with determination, forging ahead as if clearing paths through mountains and building bridges over rivers, and working with diligence to leave a tangible mark of their efforts. Thanks to this commitment, the construction work was successfully completed, and the full-water test was carried out successfully, marking significant progress in the project. The project team will build on this momentum and redouble its efforts, committing itself to the subsequent construction work with even greater enthusiasm and more practical actions. It will maintain a high pace of progress, striving to achieve further success in construction, continuing to write a legend of speed and quality in power engineering projects, and contributing more to the timely completion of the project as well as to the optimization and upgrading of the regional energy structure. As previously reported, the 100MW solar thermal energy storage power plant built by China Power Construction in Toksun County employs a tower-type concentrating photovoltaic technology; it is equipped with 14,680 medium-sized heliostats measuring 6.3m × 4.8m each, resulting in a heat collection area of 440,400㎡, and the heat can be stored for 8 hours. The project was invested and constructed by China Power Construction New Energy Group Co., Ltd. The project owner is Tuoxun Power Construction Ruida New Energy Co., Ltd. It was under the general contract of a consortium led by China Power Construction Group Central-South Survey and Design Institute Co., Ltd., which is the vice-chairman unit of the Solar Thermal Alliance, in partnership with China Water Resources and Hydropower First Engineering Bureau Co., Ltd., China Power Construction Group Nuclear Power Engineering Co., Ltd., and China Power Construction Group Hebei Province Electric Power Survey and Design Institute Co., Ltd. Zhejiang Kesheng Technology Co., Ltd. won the bid for the procurement of the concentration and heat collection systems as well as their installation. A consortium formed by China Power Construction Group Fujian Province Electric Power Survey and Design Institute Co., Ltd. and Hebei Xingyuan Engineering Construction Supervision Co., Ltd. was responsible for project construction supervision. China Energy Construction Group Central China Electric Power Test Institute Co., Ltd. was tasked with handling the work related to the solar thermal unit systems, overall commissioning, special tests, performance tests, and tests related to grid connection.