2014-2_ejemplo Pared Compuesta Cilindrica
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CILIND EJEMPLO DE CLASE SEMESTRE 2014-2 Diámetro exterior = 12.5 ft = 3810 mm Diámetro interior = 9 ft = 2743.2 mm Emisividad = 0.6 Espesor 1 = 6 in = 0.5000 ft (Material interior) Factor de rad= 0.10278 Espesor 2 = 6 in = 0.5000 ft Espesor 3 = 9 in = 0.7500 ft Velocidad del viento: 0.15 ft/s Factor de velocidad w = 1.06366 r 0 = 4.50000 ft = 54 in r 1 = 5.00000 ft = 60 in r 2 = 5.50000 ft = 66 in r 3 = 6.25000 ft = 75 in T int = 1400 °C = 2552 °F T amb = 20 °C = 68 °F Text sup = 110 °C = 230 °F k1 = 0.656 + -2.00E-05 T, BTU/h ft °F k2 = 0.092 + 2.00E-05 T, BTU/h ft °F k3 = 0.035 + 5.00E-05 T, BTU/h ft °F Valores preliminares de conductividades térmicas. T promedio = 1391 °F k1 = 0.62818 BTU/h ft °F k2 = 0.11982 BTU/h ft °F Text h conv h rad q conv-rad T 1-2 T 2-3 T1 prom T2 prom T3 prom k 1 k 2 k 3 q cond Text Diferencia °F BTU/h ft °F BTU/h ft °F BTU/h ft °F °F °F °F °F BTU/h ft °F BTU/h ft °F BTU/h ft °F BTU/h ft °F 230 0.5422 0.9435 9451.615 2299.70 1103.13 2425.85 1701.42 666.57 0.60748 0.12603 0.06833 5209.502 170.924099 0.0000 170.92 0.4840 0.8049 5209.502 2408.20 1781.17 2480.10 2094.69 976.05 0.60640 0.13389 0.08380 6205.208 185.982773 0.0000 185.98 0.5008 0.8385 6205.208 2380.41 1677.41 2466.20 2028.91 931.70 0.60668 0.13258 0.08158 6044.505 183.60917 0.0000 183.61 0.4983 0.8331 6044.505 2384.93 1693.34 2468.46 2039.13 938.47 0.60663 0.13278 0.08192 6069.267 183.977893 -0.4365 183.98 0.4987 0.8340 6069.704 2384.22 1690.82 2468.11 2037.52 937.40 0.60664 0.13275 0.08187 6065.356 183.920921 0.0000 183.92 0.4986 0.8338 6065.356 2384.34 1691.27 RESULTADOS Flux de calor: qr = 6065.36 BTU/h ft Temperatura exterior: 84.40 °C = 183.92 °F Temperaturas de interfase: T 1-2 = 1306.86 °C = 2384.3 °F T 2-3 = 921.82 °C = 1691.3 °F Página 1
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Transcript of 2014-2_ejemplo Pared Compuesta Cilindrica
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CILIND
EJEMPLO DE CLASE SEMESTRE 2014-2
Dimetro exterior = 12.5 ft = 3810 mmDimetro interior = 9 ft = 2743.2 mm Emisividad = 0.6Espesor 1 = 6 in = 0.5000 ft (Material interior) Factor de rad= 0.10278Espesor 2 = 6 in = 0.5000 ftEspesor 3 = 9 in = 0.7500 ft Velocidad del viento: 0.15 ft/s
Factor de velocidad w = 1.06366 r 0 = 4.50000 ft = 54 inr 1 = 5.00000 ft = 60 inr 2 = 5.50000 ft = 66 inr 3 = 6.25000 ft = 75 in
T int = 1400 C = 2552 FT amb = 20 C = 68 FText sup = 110 C = 230 F
k1 = 0.656 + -2.00E-05 T, BTU/h ft Fk2 = 0.092 + 2.00E-05 T, BTU/h ft Fk3 = 0.035 + 5.00E-05 T, BTU/h ft F
Valores preliminares de conductividades trmicas.T promedio = 1391 Fk1 = 0.62818 BTU/h ft Fk2 = 0.11982 BTU/h ft F
Text h conv h rad q conv-rad T 1-2 T 2-3 T1 prom T2 prom T3 prom k 1 k 2 k 3 q cond Text DiferenciaF BTU/h ft F BTU/h ft F BTU/h ft F F F F F BTU/h ft F BTU/h ft F BTU/h ft F BTU/h ft F
230 0.5422 0.9435 9451.615 2299.70 1103.13 2425.85 1701.42 666.57 0.60748 0.12603 0.06833 5209.502 170.924099 0.0000170.92 0.4840 0.8049 5209.502 2408.20 1781.17 2480.10 2094.69 976.05 0.60640 0.13389 0.08380 6205.208 185.982773 0.0000185.98 0.5008 0.8385 6205.208 2380.41 1677.41 2466.20 2028.91 931.70 0.60668 0.13258 0.08158 6044.505 183.60917 0.0000183.61 0.4983 0.8331 6044.505 2384.93 1693.34 2468.46 2039.13 938.47 0.60663 0.13278 0.08192 6069.267 183.977893 -0.4365183.98 0.4987 0.8340 6069.704 2384.22 1690.82 2468.11 2037.52 937.40 0.60664 0.13275 0.08187 6065.356 183.920921 0.0000183.92 0.4986 0.8338 6065.356 2384.34 1691.27
RESULTADOS
Flux de calor: qr = 6065.36 BTU/h ft
Temperatura exterior: 84.40 C = 183.92 F
Temperaturas de interfase:T1-2 = 1306.86 C = 2384.3 F
T2-3 = 921.82 C = 1691.3 F
Pgina 1
