A fan-driven evaporative cooling pad system can also be considered a form of ventilation for Commercial Greenhouse. All incoming air passes through the evaporative cooling pad before entering the greenhouse environment. The evaporative cooling pad has a wavy surface, which maximizes air contact with the surface.
To prevent excessive salt content in the water from causing crystallization on the evaporative cooling pad and reducing its efficiency, approximately 10% of the water can be drained away. It should also be noted that the fan-driven evaporative cooling pad system is often not turned on at night in summer, as this can easily lead to moss growth on the pad, reducing its efficiency.
Choose a high, dry site with good drainage for building the greenhouse. During site preparation, drainage ditches must be dug around the greenhouse. Inside the greenhouse, a deep trench and raised bed cultivation method should be adopted, with beds at least 20cm high to facilitate drainage.
Anti-drip membranes contain anti-fogging agents. When the surface temperature of the membrane begins to drop, moisture in the air tends to condense only on the surface of the membrane, forming a thin water film. When the water film thickens to a certain thickness, it flows down the surface of the membrane to the ground and seeps into the soil.
The drip-free film has no condensation on its lower surface, overcoming the drawback of many water droplets adhering to the inside of the film, thus reducing the air humidity inside the greenhouse. It avoids the reflection and absorption of sunlight by dew, which consumes energy through transpiration, improves the light transmittance of the agricultural film, and is beneficial for the heating and dehumidification of Commercial Greenhouse.