Passive Cooling Roof Design

Passive cooling is a building design approach that focuses on heat gain control and heat dissipation in a building in order to improve the indoor thermal comfort with low or no energy consumption.

Passive cooling roof design.

Passive cooling should be part of an overall approach to passive design. The water is collected at the bottom of the roof and. Harold hay in 1973 at atascadero california. Passive cooling design principles.

Passive solar design takes advantage of a building s site climate and materials to minimize energy use. To demonstrate a roof pond system that uses water and sun to heat and cool without electricity. The water runs down the roof cooling by radiation to the night sky. Skytherm house invented by.

Besides researchers found that a roof with a high density vegetation works as a passive cooling system in fact the energy released from the building through the roof during the summer is a 9. Passive cooling is free unlike air conditioning which is expensive to install and run. This approach works either by preventing heat from entering the interior heat gain prevention or by removing heat from the building natural cooling. H2o sun 3.

Passive design utilises natural sources of heating and cooling such as the sun and cooling breezes. What is roof pond roof pond is a passive cooling technique based upon the increased heat capacity of cheap and widely available water. Passive cooling is the use of similar design principles to reduce summer cooling requirements. To achieve thermal comfort in cooling applications building envelopes are designed to minimise daytime heat gain maximise night time heat loss and encourage cool breeze access when available.

A well designed passive solar home first reduces heating and cooling loads through energy efficiency strategies and then meets those reduced loads in whole or part with solar energy. Article on passive design cooling techniques for hot humid climates with examples. At night the system pumps water from a tank up to a roof spray tube. It is achieved by appropriately orientating your building on its site and carefully designing the building envelope roof walls windows and floors of a home.

Insulation is critical to passive cooling particularly to the roof and floor. Because of the small heating loads of modern homes it is very important to avoid oversizing south facing. Alvarado and martinez 2008 tested a simple and inexpensive passive cooling design for concrete roofs and demonstrated that the implementation of the design could result in a considerable drop in roof temperature. Windows are often left open to.

Their design is composed of an insulating layer topped by a triangular shaped reflector which casts shadows on itself and.