By Forum for the Future on 23 November 2012 in Asia and the Pacific, Buildings, Components with 2 Comments.
This post is also available in: Chinese (Traditional)
By Alan Fookes at Green Futures
Innovative technology from Sunportal, a recent South Korean and British joint venture, promises to deliver natural daylight to windowless spaces through a series of high-tech pipes, without heat gain or loss.
A mirror tracks the sun throughout the day, reflecting its rays onto a parabolic dish, which then focuses the reflected daylight into a small ‘light pipe’ aperture. The concentrated light then travels through a series of relay lenses “over any distance and in any direction”, according to the company. A diffuser ensures that light evenly reaches the desired areas.
The patented Sunportal offers luminance beginning at 80lux and peaking at 500lux (one lux is equivalent to light intensity during early twilight). What happens when the sun gets too faint? An integrated high-efficiency LED light kit, which can be connected to the mains, kicks in.