How to choose covering materials for smart greenhouse

Can greenhouse common covering materials and advantages and disadvantages, mainly from the price, service life, insulation coefficient, light transmittance and other main convenience to our vast number of planting friends.

First, the covering material is transparent glass

The planting of intelligent glass greenhouse is mainly based on colorless transparent glass. There are also some glass greenhouses with landscape greenhouses and ecological restaurants, they will choose some coated and colored glass for beauty, which increases the height of the greenhouse, thereby reducing the lighting rate.

1, the normal service life of glass is more than twenty years, and the long service life is one of the very big advantages of glass.

The intelligent greenhouse skeleton is basically the use of hot-dip galvanized square steel skeleton, the design life of twenty years, there are special requirements can do 50 years of design life.

2, from the perspective of the light transmittance of glass, the light transmittance of ordinary white glass is between 85% and 88%, and the light transmittance of low-iron ultra-white glass is between 90% and 92%. If the light transmittance of the double-sided coating of ultra-white glass is as high as 97.5%, the yield increase of light-loving crops is significant.

3, from the perspective of the glass insulation coefficient, the K value of single-layer glass is 6.3~6.4, and the K value of double-layer insulating glass is 3.0~4.0. From the data parameters, the insulation coefficient of single-layer glass is poor, which generally refers to the use of single-layer tempered glass at the top of the intelligent greenhouse, and the double-layer insulating glass is basically used around (5+6+5 double-layer glass).

Two, double hollow sunshine board

The smart greenhouse mostly uses hollow sunlight panels, and now there are three or more layers of sunlight panels. At present, it is very common for smart greenhouses to use sunlight panels on the top or around them. The advantages of the sunshine board are good insulation performance, light weight (1.4kg per square meter), convenient construction and other reasons.

1, the service life of the general hollow sunlight board is 10 years, and the transmittance attenuation and yellowing coefficient of the sunlight board within 10 years will be within a reasonable coefficient range. The basic use of Germany Bayer 1.4 grams of sunlight board cost of about 75 yuan/square meter.

2, according to the thickness of the hollow sunlight board is divided into 8mm, 10mm, 12mm (in the sunlight board intelligent greenhouse only the most 8MM), the light transmittance is about 79%, and the light transmittance is moderate.

3, in terms of insulation coefficient, the wow K value of 8mm hollow sunlight board is 3.3, and the insulation performance is better. At present, the intelligent greenhouse with hollow sunlight board is also a very common one in the northern region.

Third, plastic film (multi-storey film greenhouse)

Plastic film commonly used is basically po film, pe film, pvc film. Generally, a 15-wire po film is used in a multi-membrane greenhouse, and the service life can reach five years.

The light transmittance of plastic film is about 87% of the sunlight board is basically the same, generally a simple layer of film and single layer of glass insulation performance is not very ideal. Therefore, many multi-layer or double-layer film structures are used around the multi-layer film greenhouse, which is more conducive to increasing the thermal insulation effect in the multi-layer film greenhouse. Diaphragm film is mainly for users of greenhouse for short term use. A very practical type of greenhouse, long-term practical or the choice of glass greenhouse or sunlight panel greenhouse