Discussion on Sunlight Greenhouse Construction in Northern Greenhouse Net

　　Daylighting design

　　front roof of solar greenhouse It is the channel through which sunlight enters the greenhouse in the overall structure, so the light transmittance of the front roof is crucial. When sunlight hits the front roof, part of it is absorbed by the shed film, part is reflected, and most of the remaining sunlight can enter the greenhouse. Therefore, it is possible to increase the transmittance and improve the photosynthetic efficiency of crops by reducing the absorptivity and reflectivity as much as possible. Covering materials and framework materials: Plastic films are often used as the covering material for the roof of the solar greenhouse. Long-life shed films with high light transmittance, strong anti-pollution ability, good weather resistance, anti-aging, long-life shed films, non-drip films, and nano shed films should Ensure the lighting efficiency of the greenhouse.

　　In order to effectively improve the utilization rate of sunlight, the location and orientation of greenhouse construction can be selected according to local conditions by accurately calculating the incidence angle and time difference of sunlight. Can effectively improve the utilization of light and heat. In order to effectively achieve the thermal insulation effect of the greenhouse, special construction methods and materials are used in the design of the greenhouse wall and foundation, which can ensure the lowest temperature in the shed under extreme minimum temperature or rainy weather conditions for several consecutive days. The temperature is above 9℃, and the ground temperature of 10cm is above 12℃.

　　The use of steel as a framework for the shading area is greatly reduced, which is beneficial to light, and the durability is longer than that of the bamboo and wood framework. Although the investment is higher than the bamboo and wood framework, the service life can be as long as 10 years.

　　The temperature of the high-efficiency and energy-saving solar greenhouse is 3～5°C higher than that of the ordinary solar greenhouse, which is more conducive to the growth of crops.

Insulation Design

　　The relationship between temperature and crop life activities is as important as light, and directly related to the growth and development of crops. Vegetable photosynthesis, respiration, accumulation, transportation and distribution of photosynthetic products are closely related to the air temperature and soil temperature in the greenhouse.

　　All the heat in the solar greenhouse comes from the sun, so the light and heat in the greenhouse should be prevented from dissipating in every possible way, understand the ways of greenhouse heat loss, and propose corresponding countermeasures through thermal insulation design.

　　Reduce the heat dissipation outside the greenhouse: The heat loss in the greenhouse is mainly through the through-flow heat release and the conduction heat release through the covering surface. The greater the temperature difference between indoor and outdoor, the greater the heat loss. In order to reduce heat loss, materials with a small thermal conductivity coefficient are selected as the building materials of the greenhouse envelope to improve the thermal insulation performance. Different materials have different through-flow heat transfer coefficients, and materials with low thermal conductivity have better thermal insulation performance. Any material with thermal conductivity less than 0.2326J/m2·h·℃ is called thermal insulation material. The same material is increased in thickness or Layers can also reduce the through-flow rate.

　　Choose a shed film with good light transmission and strong heat preservation ability: nano-polyethylene shed film, which has high light transmittance and more sunlight during the day, which is beneficial to increase the temperature and has a higher thermal insulation coefficient than other similar shed films.

　　The volume of the solar greenhouse cannot be too large: the larger the volume of the greenhouse, the larger the heat dissipation area and the weaker its heat preservation ability.

　　Improve the sealing of the greenhouse and reduce heat loss: part of the heat in the solar greenhouse is lost from the gaps in the doors, windows, and film joints. Seal the gaps as much as possible to prevent heat loss.

　　In addition to keeping tightness as much as possible, there should be enough ventilation to ensure the inflow of fresh air, and prevent high temperature hazards after the temperature rises in spring. The vent adopts special design and ventilation facilities.

　　In order to ensure sufficient ground temperature, the greenhouse is designed with a cold-proof trench to cut off the lateral heat transfer of the soil at the bottom corner of the house to avoid the lateral heat loss of the soil.

　　Greenhouse materials

　　The greenhouse frame is the main material. The design is based on the local geographic latitude and wind and snow compressive load. The front roof frame of the greenhouse is arched , The parabolic arc shape can increase the stress resistance of the greenhouse frame and increase the incidence of sunlight. The frame is designed according to the load and optical principles, which not only enhances the resistance to wind and snow and the sunlight incidence rate of the greenhouse, but also improves the quality of the crop And yield.

　　Greenhouse features

　　The greenhouse heat source mainly comes from sunlight and heating facilities, using reasonable structure and special materials to make the greenhouse suitable for crop growth conditions Really meet the requirements, the use of high-efficiency and energy-saving sunlight greenhouse to plant various varieties of crops can increase the yield by 30% to 50%, and can also save coal, electricity and other heat energy, and play a role in protecting the ecological environment. It is an environmentally friendly greenhouse with a reasonable greenhouse structure and The material configuration ensures that the greenhouse performance is improved and the cost is reduced. It can be used for planting, flowers, breeding, aquatic products, scientific research, etc.

　　With the continuous improvement of the level of agricultural science and technology, the development of agricultural economy, especially the quality, specialization, marketization and industrialization of the suburbs, has provided the only way to increase agricultural efficiency and increase farmers’ income, as well as new practical agricultural technologies and Modern agricultural equipment has also become an indispensable foundation and condition for high-efficiency and high-quality agriculture. This project is designed and manufactured in accordance with the trend of high-tech agriculture. In many years of scientific research and practice, it is designed and manufactured according to the geographical, light and climatic conditions of various regions. Very high use value.

　　The high-efficiency and energy-saving solar greenhouse uses sunlight as the only heat source, uses special structures and materials, and maintains a temperature suitable for crop growth by fully absorbing the heat source and airtight insulation technology. Compared with the traditional heating greenhouse, it has No fuel or only a small amount of heating, energy saving, optimizing the ecological environment, strong profitability, short payback period, and reduced production costs. It can effectively improve the quantity and quality of crop production. It is a truly environmentally friendly greenhouse.

　　Shouguang Yongxin Greenhouse Engineering Co., Ltd., a subsidiary of North Greenhouse Net, as a developer and promoter of high-efficiency and energy-saving solar greenhouse, has complete theoretical knowledge of high-efficiency and energy-saving solar greenhouse, rich production experience, high With high-quality construction materials, a strong R&D team, comprehensive technology and high-quality services, we have successfully built high-efficiency and energy-saving solar greenhouse everywhere.

　　Shouguang Yongxin Greenhouse Engineering Co., Ltd. makes its due contribution to the development of high-efficiency and energy-saving modern agriculture, and provides consumers with energy-saving, environmentally-friendly modern energy-saving greenhouse, safe and reliable technology, high-quality engineering and perfection Service.