Low-emittance angular selective window systems

Geoffrey B. Smith; S. Dligatch; M. W. Ng

doi:10.1117/12.217340

Abstract

The issue of low emittance in angular selective window systems is discussed in the context of the overall aims of controlling glare and lowering solar gains while maintaining a clear view. Low e adds considerably to the overall performance of the window. The spectral dependence of both angular selectivity and overall transmittance in single layer anisotropic metal-insulator films needed to be improved. While these have excellent visible properties, they have high infrared transmittance and hence the window has high emittance. Results on coatings and systems set up to give the glazing a low e are examined. It is found that the visible performance is not impaired but the solar and thermal performance are improved substantially. Two methods of achieving a low emittance are discussed.

Citation Download Citation

Geoffrey B. Smith, Geoffrey B. Smith, S. Dligatch, S. Dligatch, M. W. Ng, M. W. Ng, } "Low-emittance angular selective window systems", Proc. SPIE 2531, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIV, (23 August 1995); doi: 10.1117/12.217340; https://doi.org/10.1117/12.217340

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