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【Ten Years of Rapid Development in Chemical Engineering Equipment】The world’s first “two towers and one unit” solar thermal energy storage project in Guazhou, Gansu, from 2014 to 2023

2023-11-07View Original

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Looking at the development of chemical engineering technology over the past decade, we celebrate the prosperity and strength of modern China. This is just a starting point to encourage further discussion among everyone; with your participation, things will become even more interesting. [Ten Years of Progress in Chemical Engineering Equipment] – continuous updates and summaries are available; feel free to join the discussions at https://bbs.hcbbs.com/thread-3576046-1-1.html. Prevention first, life above all. ----------------------------------------- Photothermal energy storage involves using arrays of mirrors to reflect sunlight onto a heat absorption tower located at the center of these mirrors. The heat absorber at the top of the tower uses the focused solar heat to heat molten salt. The heat generated by the molten salt is then used to convert water into steam, and the steam drives turbines to generate electricity. The 700,000-kilowatt “solar thermal energy storage+” project in Guazhou, funded and constructed by Three Gorges Hengji Nengmai (Jiuquan) New Energy Power Generation Co., Ltd., is located to the north of Shuangta Reservoir in Guazhou County, Jiuquan, Gansu. The project features 100,000 kilowatts of solar thermal energy storage capacity; construction began on October 25, 2022. Along with it, 400,000 kilowatts of wind power generation and 200,000 kilowatts of photovoltaic power generation were developed, resulting in a 700,000 kilowatt \"solar thermal energy storage+\" project in Guazhou. The total investment for this project is 4.93 billion yuan. Upon completion of all wind, solar, and storage projects, the annual power generation capacity will be around 1.9 billion kWh. This will result in a savings of 559,000 tons of standard coal per year, as well as a reduction in carbon dioxide emissions by about 1.527 million tons and nitrogen oxide emissions by 2.802 million tons. The wind and solar project is expected to go online for power generation in October this year. Currently, the west tower has been constructed to a height of 60 meters, while the east tower is at 35 meters. It is planned to raise the west tower to 165 meters by the end of August this year, at which point it will be completed; after the absorber equipment is installed, the height of the tower will reach 200.5 meters. It will be connected to the grid for power generation in June 2024, with a designed annual photothermal power generation capacity of 180 million kWh.
Reply #22023-11-07
The power generation area of this project is located beneath the heat-absorbing tower on the western side; it is equipped with two molten salt tanks, one for cold molten salt and one for hot molten salt. Pumps are used to transfer the cold molten salt from the cold tank to the top of the heat-absorbing tower, where a heat absorber heats the molten salt to 565 degrees. The hot molten salt then returns to the hot molten salt tank below. In the steam generator system, the molten salt and water are combined to convert water into steam, which drives a turbine to generate electricity. Since molten salts can effectively store heat, photothermal power generation projects can drive turbines to generate electricity at night, serving as a form of energy storage. They can also make up for the shortfall in photovoltaic power generation during nighttime or on cloudy and rainy days, thus helping to regulate the supply of renewable energy. Compared to single-tower, single-unit solar thermal energy storage projects, the dual-tower, single-unit project has two main features: first, it adopts a design with two towers and two mirror fields; second, it uses heliostats of smaller size. The use of small-area heliostats along with a dual-tower dual-mirror field design can effectively improve light utilization, thereby enhancing power generation efficiency. Image: The elliptical mirror field design and the intersection area of the mirror fields between the two towers can improve the photothermal utilization efficiency of the heat absorption tower. For this project, two heat absorption towers are installed 1 kilometer apart in an east-west orientation, and 26,964 heliostats cover an area of 4,400 mu. Through extensive technical research and efficiency calculations, the \"twin-tower single-machine\" configuration can improve the mirror field efficiency by approximately 23.94% under identical boundary conditions.
Reply #32023-11-07
【Ten Years of Rapid Development in Chemical Processing Equipment】China’s First Zero-Carbon Hydrogen and Ammonia Project: Hydrogen Compressor Units from 2013 to 2023 https://bbs.hcbbs.com/thread-5493573-1-1.html (Source: Haichuan Chemical Industry Forum Website)
Reply #42023-11-07
Haha, it’s really great, you and morphisms!

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