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System Performance | System Description | Case Study |
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System Performance
The micro-louvre screen is practically closed in its South orientation, where it almost fully reflects direct incident sunlight, while the louvres are opened towards the North so as to allow the intensive Zenith light from the sky vault and more generally the diffuse component of daylight to penetrate. As a result, daylight is distributed uniformly, without generating glare or sharp shadows in the space below. Due to the screen’s presence, directional views to the outside are partially obstructed. Because of this, and of this system’s static nature and specific louvre geometry, recommended applications are for glazed roofs, where daylight is desired but where the control of sight is not of primary importance. For a more advanced lighting analysis and project specific results, we recommend using the Lightsolve program (under development).
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Performance data for all systems in the same category. Comparison to systems in other categories, selected through the matrix filtering process.
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System Description
In order to protect the specular louvres from external influences (like dampness, or dust) that could affect the reflective surface, the screen is housed inside the cavity of a double glass unit, closed with a special edge profile. Glass discs are glued onto this edge profile and sealed with a sealing compound (thiolol, silicone). The system is usually composed of an 8mm Securit pane, an 8m inner glass sheet and 24mm cavity between them. The 25 x 20cm louvre elements are first given a specular finish with ultra-pure aluminium within a high vacuum atmosphere. The next step involves connecting the louvre elements to larger units and cutting them to shape and size according to the building location and its architectural requirements. These units can have up to a 6 sq m surface area (maximum dimensions are approximately 2.20 x 3.00 m and 1.50 x 4.00 m), although larger dimensions are available on request. Installation and maintenance are the same as for any other insulating skylight. |
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