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Hvac Question

Problem #3 (5 marks): Consider the wall section shown in Figure 1 (below). humidity -30% 10 F 0.90% Air film, R = 0.17 R=0.68 t -67 F Brick, R=0.8 Sheathing, R - 1.0 Insulation, R=10 Gypsum, R=0.45 Rin units of Chr-t-FWBtu Fig. 1 Wall section Required: Using consistent analysis, determine: a) Show a unit thermal resistance circuit for this wall. In your schemactic label the related information. b) Calculate the heat transfer rate per unit area for this wall section. c) Calculate the temperature of interface surface 1. Note: In your analysis and as a requirement, you should show the applicable equation before you start substituting numerical values. Also, where applicable, indicate what Table#, Figure #, Chart #, etc, from the textbook used in your solution. Marks will be deducted if violating this requirement