Greenhouse Evaporative Cooling System Design

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Greenhouse evaporative cooling system design.

Morris 3 reported the greenhouse cooling potential by evaporative cooling through a simple equation. They are supplied with water from a pipe above the pads and excess water is collected in a gutter at the bottom. The two most common evaporative cooling systems used in greenhouses are wet wall systems and portable evaporative coolers. 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.

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. A wet wall system consists of cooling pads encased in large aluminum housing. It has been observed by various authors 5 7 that the temperature can be lowered by 6 8 c with evaporative cooling in greenhouses. Open top design allows for easy detection and cleaning of.

4 presented a detailed treatment of the greenhouse evaporative cooling system. The coolest area of the greenhouse is adjacent to the evaporative cooling pads. The most common way of accomplishing evaporative cooling in a greenhouse is with a fan and pad system figure 1. It should be clear that like many other greenhouse systems the design and control strategy for evaporative cooling systems requires some thought and attention.

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. The fan and pad system has been the standard system for evaporative cooling for more than 50 years. In this system aspen or cellulose pads are mounted in one endwall or sidewall of the greenhouse.

The water evaporates taking heat from roof and cools the roof surface. 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. Of air per square foot of cellulose pad material are common for greenhouses based on their system design.

The basis of any evaporative cooling system is the evaporation of water into an airstream. 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. One of the most popular and efficient ways to cool large commercial greenhouses is with a wet wall system. Growers can also work with a greenhouse specialist to design a custom evaporative cooling system strong enough to manage temperatures on any scale.

The evaporative cooling system.