ABSTRACT
The term roof pond is commonly used to denote a system that incorporates a pool of water as a means of heat storage and as heat exchanger, or interim heat sink, for a building. Heat transfer between a roof pond and the occupied spaces in a building may be by means of direct thermal coupling or indirectly by the mediation of a separate element. In a cooling mode the water in the roof pond acts as a temporary repository of excess heat from the parent building, thus contributing to heat dissipation and cooling of indoor spaces. In turn, the roof pond water is cooled by natural processes.
