Heat Gains into a Building. Solar Gains Shading. Attendance. What improvement did George Ravenscroft (1618 – 1681) develop to make glass windows economically feasible? Made it square Added color to make it more attractive Added lead oxide Learned how to bevel the glass Made it thinner.
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Qconduction = U A TD
Q = SHGF x A x SC
SHGF = Solar Heat Gain Factor
A = Area
SC = Shading Coefficient
Do you see the three variables?
Roof = 14,253 Btu/Hr
WallS = 1,875 Btu/Hr
WallN = 593 Btu/Hr
WallE = 2,162 Btu/Hr
GlassS = 3,272 Btu/Hr
GlassN = 797 Btu/Hr
People (30) = 7,350 Btu/Hr 4,650 Btu/Hr
Ventilation (372) = 8,184 Btu/Hr 7,083 Btu/Hr
Infiltration = 0 0
TOTAL 38,486 Btu/Hr 11,733 Btu/Hr