How does a solar greenhouse work?

What is emitted when the temperature rises in the greenhouse is long-wave radiation, and the glass or plastic film of the greenhouse can effectively block these long-wave radiations from being dissipated to the outside world. The heat loss in the greenhouse is mainly through convection, such as the flow of air inside and outside the greenhouse, including the fluid and heat-conducting material of the gas in the gaps between the doors and windows. People can avoid or reduce this part of heat loss by taking measures such as sealing and insulation.
In the daytime, the solar radiation heat entering the greenhouse often exceeds the heat lost from the greenhouse to the outside world through various forms, and the temperature inside the greenhouse is in a state of heating up at this time, sometimes because the temperature is too high, a part of the heat has to be released specifically to meet the needs of plant growth. If a heat storage device is installed in the greenhouse, this excess heat can be stored.
At night, when there is no solar radiation, the solar greenhouse still emits heat to the outside world, and then the greenhouse is cooling. To reduce heat dissipation, the greenhouse should be covered with an insulation layer at night to cover the greenhouse with a “quilt”.
Because the solar greenhouse heats up faster when there is enough sunshine, on rainy days, and at night, it needs an auxiliary heat source to heat the greenhouse, usually by burning coal or gas, etc.
There are many common solar greenhouses, such as glass conservatories and flower houses. With the proliferation of new materials such as transparent plastic and fiberglass, the construction of greenhouses has become more and more diversified, to the point of developing field factories.
At home and abroad, there are not only a large number of plastic greenhouses for vegetable cultivation, but also many modern planting and breeding plants have emerged, and these new facilities for agricultural production cannot be separated from the greenhouse effect of solar energy.