Greenhouse Cooling and Humidification is an essential part of greenhouse agriculture and can enhance the plant growth processes. Fog cooling in greenhouse agriculture helps to increase the productivity of plant growers and farmers by reducing the water, energy, and labor costs involved in the greenhouse operation. It has also proven beneficial for controlling fungus growth in greenhouses. These fogging systems have the potential to reduce power bills, while also allowing increased productivity and control of plants. When incorporating Greenhouse Cooling and Humidification systems in a new or existing greenhouse, the following information helps establish effective and environmentally friendly greenhouse agriculture, with fog technology for humidification and cooling systems.
Ideal Humidity and Temperature for Greenhouse Growing
Greenhouse cooling and humidification can be used on a year-round basis for agribusiness and personal greenhouse use. Most agriculture requires more humidity during the beginning stages of plant life. Greenhouse misting may oversaturate seedlings, plugs, or cuttings, while a high pressure (HP) greenhouse fogging system provides a controlled source of humidity without over-wetting soil. The young plants and cuttings will do best by keeping them from dehydration until they have established a root system and can begin their own evapotranspiration. The high-tech microclimate from a HP indoor misting system can save hours of worker’s time by direct sticking cuttings, requiring no transplanting and providing exceptional results for many plants, shrubs, and trees. Humidity levels can be precisely controlled with a specially designed sprayer fog nozzle on overhead lines in the aisles. The fog sprayer is also beneficial because it can be used year-round even when heating, and it adds freeze protection on the coldest nights.
Humidification using direct pressure nozzles is a growing area of green technologies. Compared to compressed air nozzles and ultrasonic there are cost savings in operation and maintenance for indoor plant cultivation techniques. Greenhouse humidification systems are especially valuable to growing tropical and subtropical plants. Plants that tolerate high humidity levels can be grown in areas where ambient temperatures and relative humidity would normally not allow successful plant growth.
Prevent Fungus Growth
Greenhouse fogging is a simple yet effective method of controlling humidity and temperature. Greenhouse fogging can be used in conjunction with greenhouse misting and will allow for longer intervals between watering with misters, reducing fungal and rot issues and keeping the soil oxygen-rich by not over saturating the growing media. During the summer months, greenhouses using Greenhouse foggers for cooling have been able to cut their exhaust fan use in half or remove them totally when there is available natural ventilation. During winter when the weather begins to become cooler an automatic HP misting system can be used in conjunction with heating to maintain optimal indoor temperatures for agriculture. The man-made fog is close to natural clouds and will not wet workers or plants. It also helps to prevent fungus growth by not over-wetting and causing standing water which can be detrimental. Greenhouse cooling and humidification applications produce hearty plants that are naturally disease resistant for all cultivars and plants including indoor vegetable gardening, herb garden, nursery, flower bedding, and landscaping.
Greenhouse ventilation s another important factor in the overall process of indoor agriculture. Greenhouse fogging systems are usually set up inside the house or building where the plants are being grown. These typically include a filtered water hookup to high-pressure pump with nozzles overhead with adjustable humidity control. There may also be a separate humidity control for each zone. The rapid evaporation of water droplets results in the lowering of temperatures, but stagnant air will not allow for more evaporation. Instead, it will cause a “hot-house” effect with temperature and humidity rising.
Two methods to avoid the hot-house effect are fans and natural ventilation. Fog in a naturally ventilated house will cause air currents as the heavy cooler air falls, allowing for side vents equal to 10% of the floor square footage to be enough to mix the air. Natural air flow can be optimized with your greenhouse manufacturer who may take into account prevailing winds for ridge ventilation or even sawtooth designs.
Exhaust fans that draw the air from inlet shutters on the opposite wall are often moving as much as one air change a minute to combat solar load. Fogging allows half the fans to be used for one air change every two minutes with fogging at the inlet and additional nozzle lines spanning the airflow across the house. Greenhouse fogging systems are available in a variety of sizes, styles, and designs. The size and style of the unit will be determined by the amount of cooling and humidification needs. Different products are available as an integrated package. These include water treatment, controls, and humidifier pump racks and can be configured custom to fit specific needs.
Regulate Environmental Conditions
Greenhouse fog systems provide many benefits for the plant grower in agribusiness. Greenhouse fog systems help to regulate the environmental conditions within the greenhouse; however, fog systems must be carefully designed and of high enough quality to keep from over-wetting by humidistat control.
The greenhouse high pressure (HP) misting facilitates an easy way to provide moisture into the air exchange for agriculture. HP Misting can provide rapid temperature and moisture control without additional mechanical equipment. Greenhouse misting tubes should be capable of maintaining high pressures. Choosing industrial quality when selecting a cooling and heating system will give years of operation with minimum maintenance.
When it comes to indoor agriculture, HP foggers as humidifiers create very small water droplets that provide accelerated drying, by turning fans up and fog off when going into the evening. Growers have had success against powdery mildew by having the first fog at lights-on oversaturate, any fungi spores that might spread are kept at bay by a light coating of water. Chillers providing 100% mechanical cooling are standard in vertical farming under LED light. Economizers can save on the electricity bill but require outside air and exhaust louvers. In cases where odor abatement is needed fog with additives can be used at the exhaust louvers.
It is important to strike a balance between all that was discussed. With a few tweaks here and there, your greenhouse can meet higher agribusiness standards while increasing the speed and quality of plant growth. You can always contact us here at MeeFog™ for assistance in any of these steps so that your greenhouse thrives.