Solution Incropera 7th Edition

k = 02 W/m-K A = 10 m² Q_cond = 3 kW T1 = 415°C L = 2.5 cm A = 20 m² k = 1, 0.75, or 1.25 W/m-K T1 = 25°C T2 = -15 to 38°C L = 0.30 m T(x) Natural gas, cn = $0.01/MJ Furnace, ηf = 0.90 Concrete, k = 1.4 W/m-K T1 = 17°C q T2 = 10°C L = 11 m W = 8 m t = 0.2 m T(x) T T_i = 40°C q''x = 40 W/m² T_z = 20°C L = 0.05 m T(x) T T_i = 15°C A = 1 m x 3 m = 3 m² k = 1.4 W/mK T_z = 5°C L = 0.005 m T_i = 15°C Glass pane T_i = 10°C T_i = -15°C T_z = 20°C L = 5 mm T_z = 15°C Glass k_g = 1.4 W/mK k_a = 0.024 W/mK Glass W = 1 m, H = 2 m W = 1 m, H = 2 m L = 10 mm Air space Styrofoam k=0.03W/m.C Styrofoam (K=0.023 W/m-K) Masonry wall (1) Composite wall (2) T2 = 110°C D = 200 mm L = 5 mm q = 600 W T1 Aluminum (k=240 W/m·K) or Copper (k=390 W/m·K)