Question

8. In order to increase the thermal resistance of a typical exterior frame wall, such as the one in Example 1.2, t is customary to use 2 × 6 studs instead of 2 × 4 studs to allow for place ment of more insulation within the wall cavity. A typical exterior (2 X 6) frame wall of a house consists of the materials shown in the accompanying figure. Assume an inside room tem perature of 68℉ and an outside air temperature of 20°F, with an exposed area of 150 ft2. De- termine the temperature distribution through the wall. Resistance hr-ft2-F/Btu U-factor Btu/hr-ft2-F Items 1. Outside film resistance (winter, 15-mph wind) 2, Siding, wood (1/2 × 8 lapped) 3. Sheathing (1/2 in reguiar) 4. Insulation batt (5 in) 5. Gypsum wall board (1/2 in) 6. Inside film resistance (winter) 0.17 0.81 1.32 19.0 0.45 0.68 5.88 1.23 0.76 0.053 2.22 1.47 4

I need MATLAb programming for above example . Ido not want ay theory or numerical explaination

Answer 1

Sol' Given tha Thermal se siys tance fow the a side Alm thotmal Resistlance fo siding uood, Ro81 h 4 OF IBJ Thctmal Resis lance to Sheahing R332h 0FIB/ mal Resstance fo tho mal Resistance fosr inside Glm Resistance from temp T,-63°F outside Room temP. To-20 F Exposed oreo A=15042 inside to-al Pesislance to hea Plou s gven by -on4 O-81+1.32 tA+0.45+0.68 Rate of Heat tgonsAx 9= (T-10)A - (68-90)15o 22.43 321 Błulh . The heot loss th sough ul