Roof Pond Cooling System

Overall 19 roof pond cooling and 4 roof pond heating systems were identified.

Roof pond cooling system.

Roof ponds provide cooling benefits through indirect evaporative cooling and or radiant cooling 19 22 23 24 25 26. To demonstrate a roof pond system that uses water and sun to heat and cool without electricity. 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. 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.

H2o sun 3. In general the pond is covered during day to prevent heating and open at night to be cooled. 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 cools the roof which acts as a heat sink and absorbs heat from the interior of the building.

With these elements a roof pond can contribute to thermal comfort in all seasons. This review suggests that in some cases roof ponds can provide year round thermal comfort while reducing demand for. During the day water in the pond absorbs heat cooling the ceiling below. This paper systematically reviews literature on passive heating and cooling of buildings using roof ponds.

In the simplest form this involves placing a pond on the building roof. What is roof pond roof pond is a passive cooling technique based upon the increased heat capacity of cheap and widely available water. As water evaporates from the pond heat is consumed. 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.

The main aims were to gain a detailed understanding of different roof pond configurations and their performance compare effectiveness of. Exposure of the water pond to the night sky for cooling. The principal constituents of a roof pond system are the container for the water the supporting structure and the thermal insulation with which the thermal coupling and decoupling of the water are achieved. In both processes the roof acts as a heat exchanging element which is cooled by evaporation on its surface longwave radiation to the sky 1 or both.