Greenhouse is based on the presence or absence of greenhouse heating equipment, while the points in a greenhouse type, that is, no heating greenhouses. Mainly rely on natural daylight and night warm insulation equipment to maintain the indoor temperature. Usually as low-temperature greenhouse to apply. More more applications in the north. Frost flowers in general as a late, cold or in the early spring thaw in the former nursery use.
Greenhouse Performance:
Energy-saving solar greenhouse light transmission rate is generally 60% to 80%, and indoor and outdoor temperatures Chake maintained at 21 ~ 25 degrees centigrade or higher.
1. Greenhouse lighting
The one hand, solar radiation is to maintain the greenhouse temperature or to maintain heat balance of the most important sources of energy; the other hand, solar radiation is the only light source crop photosynthesis.
2. Greenhouse Insulation
Greenhouse insulation from the insulation envelope structure and activities of the insulation is composed of two parts. Before the slope of the thermal insulation material flexible material should be used to easily put away after sunrise, sunset down.
Greenhouse mainly by retaining walls, roof after roof and the former three parts, referred to as greenhouse "three elements" of which the first is the greenhouse roof surface all the light during the day light hours before the roof only covers the plastic film lighting, when the outdoor light weakens in a timely manner the activities of insulation is covered with plastic film to enhance the greenhouse warm.