Heliostat field combined by small-area plane heliostat and large convergent heliostat

Abstract

The invention discloses a heliostat field combined by a small-area plane heliostat and a large convergent heliostat, and is applied to a tower type solar thermal power generation heliostat field. The heliostat field comprises a heat absorber, the small-area plane heliostat and the large convergent heliostat, wherein the small-area plane heliostat is arranged in the area closer to the hear heat absorber, the large convergent heliostat is arranged in the area farer from the heat absorber, and the area of a reflector of the small-area plane heliostat is smaller than the area of a reflector of the large convergent heliostat. The heliostat field has the advantage that the combining method is adopted, so the fault-tolerance property is high, the construction period is shortened, the running and maintenance cost is low, and the quality of light spots can be ensured.

Description

technical field [0001] The invention relates to the field of tower-type solar thermal power generation, in particular to a heliostat mirror field in a solar thermal power generation system. Background technique [0002] The solar thermal power generation system uses heliostats to reflect sunlight to the receiver, and then converts solar radiation energy into heat energy output by the receiver through the heat-absorbing working medium in the receiver, such as water, air, liquid metal or molten salt, etc. Finally, high-temperature and high-pressure gas is generated to drive steam turbines or gas turbines to generate electricity. In the solar thermal power generation system, the heliostat, as the basic concentrating unit, is the basic equipment for energy collection and conversion of the entire system, and its investment cost accounts for about 50% of the total capital. Therefore, what form of heliostat should be used for the mirror field? appears to be particularly important....

AI Technical Summary

Problems solved by technology

However, this type of heliostat has high requirements and difficulties in terms of mirror surface production, mechanical process requirements, batch manufacturing, engineering installation and construction, fault tolerance, and operation and maintenance.

[0007] Due to the obvious advantages and disadvantages of the above four mainstream heliostat reflective surfaces, it is impossible to achieve the optimal effect for large-scale power station mirror fields using any one of the reflective surface forms

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