The insulation measures and equipment of the greenhouse are crucial to maintaining a suitable indoor temperature environment and ensuring crop growth. The following is a detailed introduction:
Insulation measures
1.Building structure design
Wall insulation: The wall material and thickness of the greenhouse have a significant impact on the insulation performance. In cold northern regions, composite structures of earth walls and brick walls are often used. For example, the outer layer is a brick wall, the inner layer is an earth wall, and the middle layer is filled with insulation material (such as polystyrene foam board). This composite wall can effectively reduce heat conduction. The earth wall itself has a certain heat storage capacity, absorbing solar heat during the day and slowly releasing it at night, thereby regulating temperature; the brick wall provides structural support and enhances thermal insulation performance.
Roof design: Sloping roofs are better for drainage and heat preservation than flat roofs. Greenhouses with double-slope roofs can form an air interlayer inside the roof to provide thermal insulation. In addition, it is also important to choose roof covering materials with good thermal insulation properties, such as polycarbonate hollow panels, whose internal hollow structure can effectively prevent heat transfer.
2. Covering material selection
Plastic film: Plastic film is one of the commonly used covering materials for greenhouses. High-quality multi-functional plastic films, such as films with anti-fog, thermal insulation, anti-aging and other properties, can reduce heat loss while ensuring light transmittance. For example, some plastic films added with infrared blockers can reflect long-wave radiation in the greenhouse and reduce the rate of heat dissipation through the film.
Insulation Quilts: Placing insulation quilts on top and around the greenhouse is an effective way to retain heat at night or in cold weather. Insulation quilts are usually composed of multiple layers of materials, including an insulating core material (such as rock wool, glass wool) and a waterproof outer layer (such as Oxford cloth). Its thermal insulation effect is significant and can reduce heat convection and radiation losses. Moreover, some smart greenhouses can now automatically retract and retract the thermal insulation quilt through electric devices, making it easy to operate.
3.Sealing treatment
Door and window sealing: The doors and windows of the greenhouse are areas where heat easily escapes. Using high-quality sealing strips and sealing materials to seal doors and windows can effectively reduce the penetration of cold wind through gaps. For example, use EPDM rubber sealing strips, which have good elasticity and sealing properties and can closely fit the door and window frames to prevent cold air from entering.
Vents Sealing: Vents need to be well sealed even when not in use. You can use a film rollr combined with a sealed film to tightly roll up the film when closing the vents to reduce heat loss through the vents.
4. Ground insulation
Laying insulation materials: Laying insulation materials on the greenhouse floor, such as ground wires, foam boards, etc., can reduce the conduction of soil heat to the ground. Geothermal wire is an electric heating device that can provide heat to the soil and increase the ground temperature when the temperature is low. The foam board mainly plays a thermal insulation role to prevent heat from escaping downward. For example, in a greenhouse growing strawberries, laying ground wires can ensure that the strawberry roots can grow normally even in the cold winter.
Post time: Jan-08-2025