Greenhouse, also known as greenhouse. A facility that can transmit light, keep warm (or warm), and be used to grow plants. In seasons that are not suitable for plant growth, it can provide a greenhouse growth period and increase production. It is mostly used for planting or raising seedlings of temperature-loving vegetables, flowers, forest trees and other plants in low temperature seasons. There are many types of greenhouses, which can be divided into many types according to different roof truss materials, lighting materials, shapes and heating conditions.The main plates are hollow polycarbonate sheet、solid polycarbonate sheet、corrugated pc sheet.
Translucency：
The greenhouse is a lighting building, so the light transmittance is a basic indicator for evaluating the light transmission performance of the greenhouse. Light transmittance refers to the percentage of the amount of light penetrating into the greenhouse to the amount of outdoor light. The light transmittance of the greenhouse is affected by the light transmittance of the greenhouse light-transmitting covering material and the shadow rate of the greenhouse skeleton, and with the different angles of solar radiation in different seasons, the light transmittance of the greenhouse is also changing at any time. The level of light transmittance in the greenhouse becomes a direct factor for crop growth and selection of crop varieties. Generally, multi-span plastic greenhouses have a light transmittance of 50% to 60%, glass greenhouses have a light transmittance of 60% to 70%, and solar greenhouses can reach more than 70%.
thermal insulation：
Heating energy consumption is the main obstacle to the operation of greenhouses in winter. Improving the thermal insulation performance of the greenhouse and reducing energy consumption are means to improve the production efficiency of the greenhouse. The heat preservation ratio of the greenhouse is a basic index to measure the heat preservation performance of the greenhouse. The greenhouse insulation ratio refers to the ratio of the coverage area of the greenhouse light-transmitting material with a small thermal resistance to the sum of the coverage area of the greenhouse enclosure structure with a large thermal resistance and the ground area. The larger the insulation ratio, the better the insulation performance of the greenhouse.
The thermal insulation performance of the greenhouse is very good. The energy consumption of heating is the main obstacle to the operation of the greenhouse in winter. Improving the thermal insulation performance of the greenhouse and reducing energy consumption is a good way to improve the production efficiency of the greenhouse.
Durability：
Greenhouse construction must consider its durability. The durability of the greenhouse is affected by factors such as the aging resistance of the greenhouse material and the bearing capacity of the main structure of the greenhouse. In addition to its own strength, the durability of the light-transmitting material is also reflected in the continuous attenuation of the light transmittance of the material with the extension of time, and the attenuation degree of the light transmittance is the decisive factor affecting the service life of the light-transmitting material. Generally, the service life of steel structure greenhouses is more than 15 years. It is required to design wind and snow loads with larger loads once in 25 years; the service life of simple greenhouses with bamboo and wood structures is 5 to 10 years, and design wind and snow loads with larger loads once in 15 years.
Due to the long-term operation of the greenhouse in a high-temperature and high-humidity environment, the surface corrosion of components has become one of the important factors affecting the service life of the greenhouse. Steel structure greenhouse, the main structure of the force is generally made of thin-walled steel, which has poor corrosion resistance. In the greenhouse, it must be treated with hot-dip galvanized surface anti-corrosion treatment. The thickness of the coating reaches 150-200 microns, which can guarantee 15 years of use. life. For greenhouses with wood structure or steel welded truss structure, it is necessary to ensure that the surface anti-corrosion treatment is carried out once a year.
Company Name: Baoding Xinhai Plastic Sheet Co.,ltd
Contact Person: Sale Manager
Email: admin@cnxhpcsheet.com
Phone: +8617713273609
Country: China
Website: https://www.xhplasticsheet.com/
Post time: Apr-27-2023