Clyde Bldg Windows Eldon Loose & Robert Brown. Energy Crisis 1973 Oil “shortage” 1973 Clyde Building completed Clyde Bldg Windows 48 on South Side 0 on.

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Presentation transcript:

Clyde Bldg Windows Eldon Loose & Robert Brown

Energy Crisis 1973 Oil “shortage” 1973 Clyde Building completed Clyde Bldg Windows 48 on South Side 0 on North and West Sides 17 on East side ( excludes stairwells, doors and the lounge area )

Heat Loss Single Pane Rtot = m^2 °C/W U = 4.07 W/m^2 ° C q”= U(Ti-To) q” = 165 W/m^2 Double Pane, Low E Rtot = m^2 °C/W U = 1.5 W/m^2 ° C q”= U(Ti-To) q” = 60 W/m^2 The average temperature in January is To = 0 °F = °C Ti = 73 °F = 22.7 °C

Energy Saved By limiting number of windows. (estimate number of windows would have been 4x45 or 180) 25% of loss with 180 windows By using double pane Low-E windows Heat loss is reduced by 63% 178 windows could be used

Window area with equal heat loss Surface area of single pane windows As = 54 m^2 q= 8.97 kW With double pane Low-E windows at q= 8.97 kW Ad = 149 m^2 275% increase in window area

Conclusion Double paned windows are much more efficient. Had the CB been built with double paned low-E windows, there could have been 275% more window area without additional heat loss.

Sources irc.nrc-cnrc.gc.ca/pubs/cbd/cbd052_e.html whatisauvalue.pdf