Greenhouse Cooling

Make the task of managing the climate in your greenhouse easier with High Pressure Fogging

Plants are capable of regulating their temperature by evaporation of water through the leaves. This process of temperature regulation can use energy that should be used for vigorous growth. Proper regulation of greenhouse temperature helps the plants to avoid poor growth, water stress and tissue damage.

Greenhouse temperature control can be achieved through evaporative cooling. Mechanical cooling systems (air conditioning or refrigeration) are prohibitively expensive in commercial greenhouse environments however high pressure fogging can provide an affordable and practical method of greenhouse cooling. High pressure fogging will also provide the most even distribution of your greenhouse cooling because the air is cooled throughout the whole greenhouse, not just cooling the air in one area and needing to be circulated by fans.

MistaFog are your experts in Greenhouse Cooling through High Pressure Fogging.

Fogging systems are the most effective and uniform method of greenhouse cooling and can achieve temperature drops up to 10^oC in unshaded and 15^oC in shaded greenhouses. High Pressure Fogging Systems produce very small droplets of water of around 10 microns, which are suspended in the air and evaporate before they fall onto the crop.

Misting systems that operate at up to 250psi, produce a droplet size of 10 to 20 times that of a High Pressure Fogging System (i.e. 100 to 200 micron) and these droplets are too heavy to be suspended in the air. The increased droplet size leads to poor evaporation, reduced greenhouse cooling effectiveness and significant wetness in the greenhouse. The wetness on the foliage can cause increased disease, fruit damage and general wetness can pose a safety risk to greenhouse staff.

High Pressure Fogging which operates at over 700psi produces droplets as small as 10 micron which gives optimal greenhouse cooling and temperature control. At this size the droplets flash evaporate, eliminating the chance for excess wetness to occur and cooling the greenhouse. As this cooling is happening in the area where the heat is, the cool air travels down to the crop level, to be replaced by the hot air rising. The convection air currents ensure even temperature distribution throughout the crop without the need for fans to stir and distribute the cooler air around the greenhouse

Tomato Greenhouse

This greenhouse is 4000 square meters and even though it is equiped with automated opening roof panels for cooling the temperature regularly rises above 34 deg Celsius.

As the fog starts to appear the air at the higher levels is cooled. The controller would normally cycle the system to keep the temperature at the desired level.

The fog cools the air at the higher levels nearest the misting nozzles and the cool air drops to the level of the plants. The hotter air then rises to be cooled by the fog. This continuous air cycle provides even temperature distribution over the crop.

The fog would normally be controlled to keep it just above the crop but by switching to manual operation more extreme fogging can be achieved.

Extreme fogging can be used to disperse some suitable insect control products. Fogging gives even and complete coverage as well as cost and time savings over manual spraying.

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