Color Tint Glazing Application

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Color Tint Glazing Application
Adam Joseph Lewis Center
Timothy P. Owen Bradley Fink Derek Mast
February 24 2005
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Research Question
Why was green used to tint atrium glazing?
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Observations
Green-tinted glass used in south-facing atrium
wall. Green-tinted glass NOT used in
south-facing classrooms. Green-tinted glass NOT
used in south-facing greenhouse wall.
Green-tinted glass NOT used in north-facing
atrium wall. In summer, atrium floor is in
shadow from roof overhang. Noticeable lighting
difference behind green glass opposed to clear
glass on sunny days Is green-tinted glazing a
response to the low winter sun altitude and a
means to passively heat the southern-exposed
atrium space?
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Hypothesis
Green-tinted glazing increases solar light
transmission in the Adam J. Lewis Center atrium -
ultimately passively heating the space.
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Method of Research
GE Triple Range Light Meter Color Window
Films Cardboard Box Glass Lamp
Took light readings under a direct and controlled
lighting source on an overcast day of different
colored films Light reading outside of box
determined maximum light exposure Similarly,
light readings were taken outside the
green-tinted glazed atrium wall Light readings
were taken inside the box as different colored
films were applied, as well as outside of box
(within atrium)
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Data
Inside Atrium Illuminance Light Source
Distance COT Illuminance (w/o Lamp)
COT Outside Box 650 FC 5
155 FC
Inside Box
650 FC 5
1.0 135 FC
0.87 Inside Box
black 42 FC
5 0.064 10
FC 0.065
Inside Box red 170 FC
5
0.26 22 FC
0.14 Inside Box yellow 600
FC 5
0.92 100 FC
0.64 Inside Box blue
140 FC 5
0.22 38 FC
0.24 Inside Box green
155 FC 5
0.24 42 FC
0.27 Outside Atrium No Box
Illuminance Inside
Atrium 375
FC Outside Atrium 1000
FC
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Data
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Conclusion
Green-tinted glazing decreases solar light
transmission. Red, green, and blue have a
coefficient of transmission similar to one
another. Why was green used to tint atrium
glazing?