Overall solution for glass greenhouse

Provide overall solutions for glass greenhouses from design to implementation.

Keyword:

Advisory hotline: +86-22-68287199

Classification:

Glass greenhouse accessories

Technical documentation:

chenwei@tkoisteel.com

Consulting

Details Introduction

Greenhouse structure design
• Main structure: Generally uses materials such as hot-dip galvanized steel pipes and aluminum alloy profiles. Hot-dip galvanized steel pipes have good corrosion resistance and strength, and can withstand the weight of the greenhouse and external wind and snow loads. Aluminum alloy profiles are mostly used in greenhouse doors, windows, frames and other parts, and have the advantages of being beautiful, lightweight, and corrosion-resistant.

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• Covering material: Double-layer insulating glass is commonly used. For example, a configuration of 5mm tempered glass for the outer layer + 12mm argon-filled layer + 5mm Low-E coated glass for the inner layer can achieve a visible light transmittance of 85% and a far-infrared reflectance > 90%, which can effectively keep warm and insulate heat, and also has high light transmittance, providing sufficient light for crops.

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Environmental control system
• Temperature control:
◦ Heating system: In cold northern regions, a ground source heat pump system can be used to exchange heat with the soil through vertical buried pipes to provide heat for the greenhouse. For example, in the Qianhe Agricultural Technology solution, the vertical buried pipe depth is 100m, and the heat extraction from a single well is 45kW, which can meet the heating needs of a 1000㎡ greenhouse.

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◦ Cooling system: Common ones include wet curtain fan cooling systems, which reduce the temperature of the air entering the greenhouse by absorbing heat through the evaporation of moisture on the surface of the wet curtain; it can also be combined with top electric skylights and side wall vents to enhance ventilation and heat dissipation during high temperatures in summer.
• Humidity control: Install humidity sensors to monitor the humidity in the greenhouse in real time. When the humidity is too high, dehumidify through the ventilation system; when the humidity is too low, spray devices or ground watering can be used to increase the humidity.
• Illumination adjustment:
◦ Shading system: Including internal and external shading nets, the degree of expansion of the shading nets can be adjusted through the electric control system according to the light intensity and crop needs to avoid strong light from directly harming crops and reduce the temperature of the greenhouse.
◦ Supplementary lighting system: Select LED supplementary lighting lamps to provide 400 - 700nm full-spectrum light, and the photon flux density can be adjusted according to the crop growth stage. For example, supplement light to crops on cloudy or rainy days or seasons with insufficient light to promote photosynthesis.

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Irrigation and fertilization system
• Irrigation system: Use water-saving irrigation methods such as drip irrigation and sprinkler irrigation. The water is accurately delivered to the crop root area through droppers or sprinklers installed near the crop roots to reduce water waste. At the same time, it is equipped with an automatic irrigation controller, which can automatically control the irrigation time and water volume according to the feedback data from the soil moisture sensor.
• Fertilization system: Combined with the irrigation system to form an integrated water and fertilizer system. The fertilizer solution is injected into the irrigation water according to the set ratio through the fertilizer pump to achieve precise fertilization. After being mixed and filtered, the fertilizer solution is evenly transported to the crop roots to improve fertilizer utilization.
Intelligent control system
Use sensors, wireless communication, Internet of Things, automatic control, big data analysis and other technologies to monitor and control the environmental parameters in the greenhouse in real time.

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• Data acquisition: Real-time collection of environmental data through various sensors distributed in the greenhouse, such as temperature sensors, humidity sensors, light sensors, soil nutrient sensors, etc., and transmit the data to the management platform

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• Intelligent decision-making: The management platform analyzes and makes decisions based on the preset crop growth environment parameter thresholds and the data collected by the sensors, and automatically controls the corresponding equipment, such as ventilation equipment, shading equipment, irrigation equipment, heating equipment, etc., so that the environment in the greenhouse is always maintained in a state that is conducive to crop growth.

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• Remote monitoring: Supports remote login to the management platform through smart terminals such as Android / IOS mobile phones and computers to realize remote monitoring and operation of the greenhouse, which is convenient for management personnel to grasp the operation of the greenhouse anytime and anywhere and perform remote control.

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Supporting facilities
• Planting facilities: According to the different crops planted, planting facilities such as planting tanks and planting racks can be selected. For example, for soilless cultivation, rock wool planting tanks, hydroponic planting racks, etc. can be used; for soil cultivation, standardized planting ridges can be used.
• Ventilation facilities: The top electric skylight and side wall vents cooperate to form a good ventilation system. In winter, a small amount of ventilation can be achieved, while in summer, the ventilation volume can be increased to adjust the air circulation in the greenhouse, keep the air fresh, and reduce the chance of pests and diseases.

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• Operating channels and equipment: Set up reasonable operating channels to facilitate personnel and equipment to operate and manage in the greenhouse. At the same time, equip with necessary agricultural machinery and equipment, such as small tractors, transplanters, harvesters, etc., to improve labor efficiency.