Passive Solar Design
- Lay Koon Ng
- Nov 17, 2020
- 1 min read
Updated: Mar 7, 2021
Course: ID Application 1
Week: 1-7
Title: Research of passive solar design
Windows, walls, and floors are made to collect, store, reflect, and distribute solar energy in the form of heat in the winter and reject solar heat in the summer.
It does not involve the use of mechanical and electrical devices.
Take advantage of the local climate by performing an accurate site analysis.
FIVE Element of Passive Solar Design
Aperture/Collector: The large glass area through which sunlight enters the building. The aperture(s) should face within 30 degrees of true south and should not be shaded by other buildings or trees from 9 a.m. to 3 p.m. daily during the heating season.
Absorber: The hard, darkened surface of the storage element. The surface, which could be a masonry wall, floor, or water container, sits in the direct path of sunlight. Sunlight hitting the surface is absorbed as heat.
Thermal mass: Materials that retain or store the heat produced by sunlight. While the absorber is an exposed surface, the thermal mass is the material below and behind this surface.
Distribution: Method by which solar heat circulates from the collection and storage points to different areas of the house. A strictly passive design will use the three natural heat transfer modes- conduction, convection, and radiation- exclusively. In some applications, fans, ducts, and blowers may be used to distribute the heat through the house.
Control: Roof overhangs can be used to shade the aperture area during the summer months. Other elements that control under and/or overheating include electronic sensing devices, such as a differential thermostat that signals a fan to turn on; operable vents and dampers that allow or restrict heat flow; low-emissivity blinds; and awnings.
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