Greenhouse Evaporative Cooling System Design

The most common way of accomplishing evaporative cooling in a greenhouse is with a fan and pad system figure 1.

Greenhouse evaporative cooling system design.

4 presented a detailed treatment of the greenhouse evaporative cooling system. Open top design allows for easy detection and cleaning of. One of the most popular and efficient ways to cool large commercial greenhouses is with a wet wall system. The new design of this system eliminates the need for a separate external sump tank and minimizes the amount of piping needed for the system while reducing annoying leaks.

The basis of any evaporative cooling system is the evaporation of water into an airstream. Here roof cooling is independent of the internal humidity level of the greenhouse and the inside air is sensibly cooled because of a colder roof. Typical fan and pad greenhouse arrangement. Growers can also work with a greenhouse specialist to design a custom evaporative cooling system strong enough to manage temperatures on any scale.

Check out our greenhouse cooling systems aluminum evaporative cooling systems. The water evaporates taking heat from roof and cools the roof surface. In this system aspen or cellulose pads are mounted in one endwall or sidewall of the greenhouse. Roof evaporative cooling is another system where cooling is achieved by spraying water on the roof of the greenhouse.

Of air per square foot of cellulose pad material are common for greenhouses based on their system design. They are supplied with water from a pipe above the pads and excess water is collected in a gutter at the bottom. Designed with the grower in mind these cooling pads and systems will use heat in the air to evaporate water from plants and other wetted surfaces that will then cool your structure. Morris 3 reported the greenhouse cooling potential by evaporative cooling through a simple equation.

The fan and pad system has been the standard system for evaporative cooling for more than 50 years. With multiple designs and sizes for both greenhouse swamp coolers and evaporative cooling walls available growers can find the right equipment for their operation no matter the requirements. Evaporative cooling achieve and maintain cooler temperatures in your greenhouse in any climate with a cost effective evaporative cooling system. Figures of 200 350 cu ft.

The two most common evaporative cooling systems used in greenhouses are wet wall systems and portable evaporative coolers. Evaporative cooling for greenhouses relates to the evaporation of water either by re circulating evaporative pad cooling systems or by high pressure fog systems or a combination of both. The coolest area of the greenhouse is adjacent to the evaporative cooling pads. It has been observed by various authors 5 7 that the temperature can be lowered by 6 8 c with evaporative cooling in greenhouses.

It should be clear that like many other greenhouse systems the design and control strategy for evaporative cooling systems requires some thought and attention.