What are passive solar technologies?
Passive solar (PS) technologies refer to an approach that substitutes active mechanical systems and traditional energy sources with solar energy technologies. PS techniques employ the steady generation of solar energy through structural designs. The term 'passive' emphasizes that no mechanical equipment is used, only the normal building elements. All solar gains (increase in temperature due to solar radiation) are ensured mostly through windows. Such applications convert solar energy into various types of usable heat. PS can also reduce summer cooling requirements by means of passive cooling.�
Requirements
PS technologies use direct and indirect solar gain for activities like heating space, solar water heating systems based on passive heat exchange applications, thermal mass for solar cookers, solar chimney for enhancing natural ventilation, etc. Some applications like the solar furnace and solar forge require some amount of active energy hence are not frequently used. Simpler energy needs like space and water heating are proven to be better avenues for utilizing PS energy.
What it does
PS technologies use building elements, for example, walls, windows, floors, etc. along with exterior building elements to monitor heat from solar radiation. Solar heating designs focus on the collection and storage of sunlight heat. Passive cooling minimizes the effects of solar radiation by methods of convection ventilation or use of shades. Day lighting design is another concept that uses natural daylight optimally. PS techniques are best known for their simplicity, low cost, and energy efficiency.
