Roof Pond Cooling System

What is roof pond roof pond is a passive cooling technique based upon the increased heat capacity of cheap and widely available water.

Roof pond cooling system.

Roof ponds provide cooling benefits through indirect evaporative cooling and or radiant cooling 19 22 23 24 25 26. Overall 19 roof pond cooling and 4 roof pond heating systems were identified. 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. This paper systematically reviews literature on passive heating and cooling of buildings using roof ponds.

With these elements a roof pond can contribute to thermal comfort in all seasons. In the simplest form this involves placing a pond on the building roof. Roof ponds with wet gunny bags shaded roof ponds ventilated roof ponds and roof ponds with movable insulation proved to be more effective relative to other variants of roof pond cooling systems. Exposure of the water pond to the night sky for cooling.

The main aims were to gain a detailed understanding of different roof pond configurations and their performance compare effectiveness of. A more refined method involves insulating the pond during the daytime to prevent solar gain. H2o sun 3. To demonstrate a roof pond system that uses water and sun to heat and cool without electricity.

As water evaporates from the pond heat is consumed. This cools the roof which acts as a heat sink and absorbs heat from the interior of the building. 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. Evaporation in a pond is proportional to the air water contact area.

In general the pond is covered during day to prevent heating and open at night to be cooled. Comparing performance relative to other passive strategies showed that in many cases roof pond cooling systems are about equally effective in maintaining indoor thermal comfort. This review suggests that in some cases roof ponds can provide year round thermal comfort while reducing demand for. An indirect gain design which provides both heating and cooling is the thermal pond approach which uses water encased in ultraviolet ray inhibiting plastic beds underlined with a dark color that are placed on a roof.