When citizen talk about passive solar vigor what commonly comes to mind is the orientation of construction sites for maximum heating in the winter and cooling in the summer. Orienting structure to take maximum benefit of the sun is an old practice, but there are other passive uses of sunlight which are just as old. Solar heating of water and various methods of bringing sunlight into houses for lighting purposes have both been practiced by cultures as far back as the old Egyptians.
Skylights and atriums are the most well-known use of the sun for lighting in the home, but other method used in old Egypt is less well known. Known, variously, as 'light tubes', 'tubular skylights', 'light pipes', 'sunscoops', or 'solar tubes', in their customary form they were narrow shafts, sometimes lined with reflective material to better reflect the sun. These are best known for their use in the tombs of the old Egyptians, bringing light deep into their secret chambers.
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Modern solar tubes date from the patenting of the prism light guide in 1981, although back before galvanic lights a similar make was patented and marketed by Paul Emil Chappuis, beginning in the 1850s. His reflectors, designed to send light deep into structure were in yield until his factory was destroyed in World War Ii. The solar tube in its most tasteless form began to be commercially ready in 1991. In 1998 a European Union investigate project called Arthelio began to investigate hybrid lighting systems combining synthetic light (the 'art' part of the acronym) with a Heliostat theory to distribute natural light. The project continued until 2004 and resulted in two demonstration projects.
Modern investigate on hybrid systems notwithstanding, the basic solar tube idea is straightforward and relatively easy to implement. Marketed as light tubes or tubular skylights, these solar tubes, unlike customary skylights, do not need major reconstruction work, and the comparatively small opening is less field to leakage and other problems associated with their larger brethren. They need minimal space, so they are ideal for closets or bathrooms, and can be installed on any type of roof. Kits, along with detailed instructions, are ready from home correction centers such as Lowes or Home Depot.
Passive Solar Lighting - A History of Solar Tubes LOWES
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