Roof Surface Evaporative Cooling

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Roof surface evaporative cooling.

Heat is now transferred out of the building through the roof. A roof with a clean smooth bright white surface can reflect about 85 of incident sunlight and emit thermal radiation with 90 efficiency. Champion cooler 6500 cfm side draft wall roof evaporative cooler for 2300 sq. The water evaporates and cools the surface.

Set your store to see local availability add to cart. There are many types of roof systems available but the surface exposed to the sun is the one that determines if a roof is cool or not. The evaporation of water causes cooling of the roof surface. These systems provide cooling by spraying water on the roof surface.

Also called an evaporative cooling system a roof misting system lowers surface temperatures by spraying an extremely small amount of water across the roof allowing the water to cool the roof as it evaporates. A better way to cool the roof is to change its color. Cool roof coatings are white or special reflective pigments that reflect sunlight. This effect creates an effect equivalent of r 7 roof insulation during the day.

They are simple and appear to be effective but would not be a good choice in areas where water is in short supply. At its lowest tech a roof misting system can be little more than a garden hose set to the mist setting and aimed across the roof. This surface will be only 9 f warmer than the outside air on a typical summer afternoon. An evaporative roof cooling system is designed to reduce the temperature of a roof from 165 f to about 90 f.

Evaporative cooling is one of the well known techniques to cool the roof surface resulting in the reduction of thermal load of the building. You can usually make a new or existing roof cool by selecting the appropriate surface. Coatings are like very thick paints that can protect the roof surface from ultra violet uv light and chemical damage and some offer water protection and restorative features. Evaporative cooling systems are characterised by low energy use compared with refrigeration cooling.

An evaporative cooling system consists of an intake chamber filter s supply fan direct contact or indirect contact heat exchanger exhaust fan water sprays re circulating water pump and water sump. In warm climates evaporative spray roof cooling esrc systems not to be confused with roof ponds. This cooling reverses the heat flow through the roof.