Double-arch film greenhouse has low construction cost than polycarbonate greenhouse and glass greenhouse :
Double-arch film greenhouses are mainly composed of simple frame structures and film covering materials. The frame materials can usually be made of relatively affordable steel or aluminum alloy, etc., which are lower in cost than the high-quality aluminum alloy or steel structure used in glass greenhouse and the special profiles of polycarbonate greenhouse. The film material itself is relatively cheap, and its lightweight characteristics mean that the polypropylene greenhouse frame does not need to bear too much weight, so that smaller and lower-priced structural materials can be used. For example, to build a greenhouse of the same area, the construction cost of a double-arch film greenhouse may be only 1/3 - 1/2 of that of a glass greenhouse.
Double-arch film greenhouse has low operating cost polycarbonate greenhouse and glass greenhouse :
The double-arch film greenhouse has good thermal insulation performance. In winter, the air interlayer in its double-arch structure can effectively reduce heat loss. This reduces the operating time and energy consumption of the heating equipment while maintaining a suitable temperature in the greenhouse. For example, compared with a single-arch film greenhouse, a double-arch film greenhouse may reduce heating costs by 30% - 50% in winter. At the same time, its ventilation and irrigation systems are relatively simple, and the equipment cost and operating energy consumption are also low. Moreover, if the film is damaged, the cost and difficulty of replacing the film is much lower than replacing glass of glass greenhouse or PC board of polycarbonate greenhouse, which reduces the maintenance cost.
Lighting aspect
The film material of the double-arch film greenhouse has good light transmittance. The light transmittance of high-quality film can reach 80% - 90%, which can allow a large amount of natural sunlight to penetrate into the polypropylene greenhouse
. This high light transmittance feature can ensure that the plants in the polypropylene greenhouse
get sufficient light for photosynthesis. Compared with polycarbonate greenhouse and glass greenhouse , film materials can scatter light to a certain extent, making the light distribution more uniform and avoiding the situation where local strong light directly causes plant burns. While some polycarbonate greenhouse may have a decrease in light transmittance due to factors such as the quality of the PC board or the use time, the double-arch film greenhouse can continue to provide good lighting conditions under normal circumstances.
Temperature regulation aspect
The air interlayer formed by the double arch structure of the double-arch polypropylene greenhouse has a good thermal insulation effect. In cold seasons, this air interlayer is like an insulation layer, which can slow down the heat loss in the greenhouse and keep the indoor temperature within a relatively stable range. For example, when the temperature is low at night, the indoor temperature of the double-arch polypropylene greenhouse may be 3-5℃ higher than that of the glass greenhouse. At the same time, in summer, through proper ventilation and shading measures, the double-arch film greenhouse can also effectively regulate the temperature to avoid excessive indoor temperature. However, some glass greenhouse structures may cause excessive indoor temperature in summer due to poor ventilation or insufficient shading measures, affecting plant growth.
Humidity regulation
The relatively closed space of the double-arch film greenhouse is conducive to maintaining humidity. By controlling the opening and closing of the vents, the air humidity in the polypropylene greenhouse can be easily adjusted. For example, when the humidity needs to be increased, the opening time of the vents can be reduced to allow indoor water vapor to be preserved; when the humidity needs to be reduced, the vents are opened to allow humid air to exchange with dry air outside. Compared with some grpolycarbonate greenhouse and glass greenhouse with excessive ventilation, the double-arch polypropylene greenhouse can better maintain a humidity environment suitable for plant growth, especially for those plants that require a higher humidity environment, such as Phalaenopsis, the convenience of this humidity regulation is more obvious.
