Entech Collimating Skylights (ESC) - Overview
Daylighting is a truly sustainable way to displace artificial lighting and thereby reduce use of electricity. Natural daylight has additional benefits of improving student performance in schools, increasing sales in retail areas, and improving productivity and job satisfaction in the work environment. Providing daylighting with skylights on the roof is one of the best ways to provide natural lighting to interior spaces. Entech Solar has developed products that optimize the use of skylights to provide daylighting.
Entech Collimating Skylights
Entech Solar’s patented technology efficiently collects and collimates sunlight to redefine the future of daylighting. Collimation is the technique of redirecting sunlight, which arrives from all directions from the sky above, to the desired interior space of the building below, throughout the day and throughout the year. Entech Solar’s basic collimating technology is described in Patent No. US 6,363,667 and in more recent patent applications. The Entech Collimating Skylight typically requires only one or two reflections to optimally redirect the sunlight, thereby enabling the use of very low cost reflectors. This combination of high efficiency and low material cost redefines the daylighting cost per lumen.
Conventional skylights lack control over where the light goes inside the building. In contrast, the Entech Collimating Skylight redirects the incident sunlight to the working space beneath the skylight. This provides excellent engineered control over the light placement, without any moving parts or other complicated features.
How It Works
The unique pyramidal shape of the Entech Collimating Skylight begins collimation as soon as the sunlight enters the dome and is completed immediately under the roof inside the building as shown in the photo to the right. The dome aperture is tilted toward the equator to maximize the annual amount of sunlight that can be captured by a stationary skylight, and to provide a similar light output near solar noon year-round, simplifying lighting engineering design for the space below.