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Glazing Materials - Optical Properties

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The ideal solar collecting energy glazing material is transparent to short-wave infrared radiation and opaque to long-wave radiation.

Optical properties of some typical glazing materials:

Glazing Materials - Optical Properties
Short-wave Infrared Solar TransmittanceLong-Wave Infrared Transmittance
Window glass (float glass) 4 0.83 0.02
Low-iron glass 3 0.89 0.08
Acrylic Glass - Poly(methyl methacrylate) (common trade names Plexiglas, Limacryl, R-Cast, Perspex, Plazcryl, Acrylex, Acrylite, Acrylplast, Altuglas, Polycast, Oroglass and Lucite) 3 0.82 0.02
Polyvinyl Fluoride (known by his trade name Tedlar from DuPont) 0.1 0.92 0.22
Polyester, Mylar 0.1 0.87 0.18
  •  1 mm = 0.03937 in
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Related Topics


Climate, meteorology, solar, wind, emissions and environmental related engineering resources.

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Absorbed Solar Radiation

Solar radiation absorbed by various materials.

Radiation Heat Transfer

Heat transfer due to emission of electromagnetic waves is known as thermal radiation.

Solar Heat Transmission through Windows

Solar heat gain through windows with roller shades, vertical blinds and Venetian blinds

Solar Radiation - Daily Surface Energy

Daily surface energy from solar radiation.

Solar Radiation through Windows

Heat from sun transmitted through windows.

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