Chapter 3 Steady Heat ConductionPropertiesThe R-values at the outer surface of a wall for summer (7.5 mph winds) and winter (15 mph winds) conditions are given in Table 3-6 to be Inside Outside 7.5 mphWALL Ro, 7.5 mph = Ro, summer = 0.25 h.ft2.°F/Btu and Ro, 15 mph=Ro, winter = 0.17 h.ft2.°F/Btu AnalysisThe R-value of the wall at 7.5 mph winds (summer) is RUwall, 7.5 mphwall, 7.5 mph2h.ftF / Btu===⋅°110091111//..Noting that the added and removed thermal resistances are in series, the overall R-value of the wall at 15 mph (winter) conditions is obtained by replacing the summer value of outer convection resistance by the
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This note was uploaded on 01/19/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.