The column contains ideas for the five national competition questions and will be continuously updated.
Building a new power system with new energy as the main body is an important step for my country to achieve the goals of "carbon peak" and "carbon neutrality"
measure. Tower solar thermal power generation is a new low-carbon, environmentally friendly, clean energy technology [1].
The heliostat is the basic component for collecting solar energy in a tower solar thermal power station (hereinafter referred to as a tower power station). Its base is composed of
It consists of a longitudinal rotating axis and a horizontal rotating axis, and the plane reflector is installed on the horizontal rotating axis. The axis of the longitudinal rotating shaft is perpendicular to the ground and can
Controls the azimuth angle of the reflector. The axis of the horizontal rotating shaft is parallel to the ground, which can control the pitch angle of the reflector, heliostat and base.
See Figure 1 for a schematic diagram. The height of the intersection point of the two rotating axes (also the center of the heliostat) from the ground is called the installation height of the heliostat. Tower type
The power station uses a large number of heliostats to form an array, called a heliostat field. The heliostat collects the reflected sunlight and absorbs it when it is installed in the mirror field.
The heat collector on the top of the tower heats the heat-conducting medium and stores the solar energy in the form of thermal energy, and then through heat exchange
Realize the conversion from thermal energy to electrical energy. Sunlight is not parallel rays, but a bunch of conical rays with a certain cone angle, so
The reflected light from the incident light of the sun at any point of the heliostat is also a cone of light [2]. When the heliostat is working, the control system
Control the normal direction of the heliostat in real time according to the position of the sun, so that the light emitted from the center of the sun is reflected by the center of the heliostat and then directed
collector center. The height of the collector center above the ground is called the absorption tower height.
It is now planned to be constructed in a circular area with the center located at 98.5∘ east longitude, 39.4∘ north latitude, 3000 m altitude, and 350 m radius
A circular heliostat field (Fig. 2)