How To Use Sunshine Board Greenhouse Correctly

Sunlight is an indispensable energy source for green plants to carry out photosynthesis, and it is also the main heat source for solar panel greenhouses. Therefore, when designing a solar panel greenhouse, the first thing to do is to solve the lighting problem of the greenhouse, and to make the sunlight penetrate into the greenhouse to the limit. The solar panel greenhouses in northern China are mainly used in winter, spring and autumn. In winter, the sun's altitude is low, with sunrise in the southeast and sunset in the southwest. Therefore, in order to maximize the use of sunlight in winter, the solar panel greenhouses usually adopt an orientation that faces south and extends east-west. Practice has proved that the outside temperature is very low in winter morning. After the grass curtain is opened in the morning in the east greenhouse, the indoor temperature often drops significantly.

The orientation of the solar panel greenhouse is as good as possible to the west, which will help to extend the light time in the afternoon and heat preservation at night. It is suitable to be 5 degrees westward, and should not exceed 10 degrees. When the incident angle of light increases from 0 degrees to 40 degrees, it has little effect on the transmittance of transparent materials. The reflection loss rate of the light quantity is only a few percent; when the incident angle changes within 40 degrees to 60 degrees, the light is transmitted The light transmittance shows a significant downward trend with the increase of the incident angle; when the incident angle is greater than 60 degrees, the light transmittance shows a sharp downward trend. Therefore, the incidence angle of 40 degrees or the projection angle of 50 degrees is the critical point that affects the transmittance of transparent materials. In the early stage of the development of the solar panel greenhouse, the lighting angle at which the projection angle of the sun on the lighting surface of the greenhouse on the winter solstice reached 50 degrees was set as a reasonable lighting roof angle.