The beam-down concentrating solar power plant has the advantages of high concentrating ratio

low installation and maintenance requirements

and low pump consumption. Relying on the 50 MW beam-down tower concentrating solar power station in Yumen Xinneng First Power Co.

Ltd.

the mathematical models of the heliostat field

hyperboloid mirror

receiver

molten salt tank

and power generation cycle are established and verified. The run-test results reveal that

the maximum outlet temperature of the molten salt can be maintained at 559 ℃ for 50 minutes at an average direct normal irradiation of 739.70 W/m~2. The cosine efficiency

shading and blocking efficiency

shading efficiency of the hyperboloid mirror

and attenuation efficiency of the heliostat field at 12:00 are 0.856 8

0.999 7

0.994 1

and 0.974 6

respectively. The average hyperboloid mirror flux density and receiver flux density are 11.3 kW/m~2 and 400.5 kW/m~2

respectively. Meanwhile

the power station is maintained for 16 h at the rated generation power of 50 MW. The research has certain reference significance for the operation of a beam-down concentrating solar power plant.