What is a passive solar greenhouse

In general, all greenhouses collect solar energy in applications. You might think that a greenhouse should capture the maximum amount of solar energy and should be oriented to straight south. Not so. Believe it or not, the optimal orientation is actually slightly to the east. This gives the greenhouse early morning sun and rejects sun towards the end of the day when it’s most prone to overheat. In most cases, the degree of exposure to the sun determines the light conditions inside the greenhouse, which varies according to the season, latitude, greenhouse structure, the aging of plastic film, and the duration of the sunshine. During the winter at high latitudes, there is less solar radiation reaching the greenhouse than in the spring and fall seasons. Areas at lower latitudes are exposed to more optimal light conditions in the winter. However, aging of the plastic film reduces its transparency.


As a rule, sunlight provides the sole source of light and heat in the solar greenhouse. In the recent years, solar greenhouses are very popular in the modern agriculture, for they are designed not only to collect solar energy during sunny days but also to store heat for use at night or during periods when it is cloudy. They can either stand alone or be attached to houses or barns. A passive solar greenhouse is basically a solar collector, which collects solar energy for heat and photosynthesis. A passive solar greenhouse is often considered a good choice for small growers because it is a cost-efficient way for farmers to extend the growing season, potentially year-round. Furthermore, if you are considering building a small greenhouse in the coming days, the proper insulation and glazing and adding ways to capture and hold onto solar energy will yield a passive solar greenhouse that doesn’t cost too much more to build compared to a traditional greenhouse.

In applications, there are some distinctive features of a typical Passive solar greenhouse as follows:
•Insulated foundation: unlike most greenhouses where plants are grown in containers or hydroponically, a passive solar greenhouse allows you to plant directly into the ground;
•Rear north facing straw bale, cob, or brick wall;
•Glass or polycarbonate glazing, both of them are more durable than plastic;
•Super-insulated side walls (either straw bale or conventional insulation) and roof;
•Passive solar water wall
•Active solar fan and vent: the size, placement, and the number of vents can be customized to fit your heat and humidity profile

We are committed to producing various types of steel products for your choice in your greenhouse project in future. Our products are all designed for the fast and easy installation in applications. Contact us if you have any need in your project.

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Post time: Jan-20-2021
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