Summary The sun is not always fixed in a certain position in the sky, but a carriage is pulling from east to west, and its horizontal position and altitude position are changing. Therefore, if the solar panel
The sun is not always fixed in a certain position in the sky, but a carriage is pulling from east to west, and its horizontal position and altitude position are changing. Therefore, if the solar panel is fixed, it will not have a vertical relationship with the sun for most of the day, and the efficiency of using solar energy is relatively low.
So, if we can't change the environment, then we might as well change ourselves, since the sun refuses to stop, then we move. So he invented the "sunflower" type solar energy, wrong, the material is said to be "Kuafu chasing the sun" type solar energy. Let the solar panel chase the sun like a little fan, you see, you see, the solar panel's face is secretly turning with you.
The speed of the solar panel's face turning is actually the speed of the sun turning. How should speed be sought? We have learned physics, speed = distance (angle) / time. Then we use this formula to look at the speed of the sun around the earth.
Let me talk about horizontal speed first. The horizontal angle of the sun during the day from the east (northeast, southeast)-true south-west (northwest, southwest) divided by the length of the day. But in fact, we don't need to calculate this, because we learned that the angular velocity of the earth's rotation is 15 degrees per hour, so the speed at which the sun rotates around the earth is also 15 degrees per hour, which is constant regardless of winter, summer, spring and autumn.
Let's talk about the vertical speed. Vertical velocity is the vertical change of the sun divided by the length of the day. The vertical change of the sun is the maximum solar height from zero degrees in the morning and evening to the noon of the day. The day length is the day length. We will calculate the height of the noonday sun. During the summer solstice, the height of the noonday sun in Beijing is about 73.5 degrees, and the vertical change of the sun is 73.5 degrees. In the winter solstice, the height of the midday sun in Beijing is about 26.5 degrees, and the vertical change of the sun is 26.5 degrees. .
