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Considere una ventana de hoja doble de 1.2 m de alto y 2 m de ancho que consta de dos capas de vidrio (k= 0.78

Considere una ventana de hoja doble de 1.2 m de alto y 2 m de ancho que consta de dos capas de vidrio (k= 0.78 W/m C) de 3 mm de espesor separadas por un espacio de aire estancado (k = 0.026 W/m C) de 12 mm de ancho. Determine la razn de transferencia de calor estacionaria a travs de esta ventana de hoja doble y la temperatura de su superficie interior para un da durante el cual el cuarto se mantiene a 24C en tanto que la temperatura del exterior es de -5C. Tome los coeficientes de transferencia de calor por conveccin sobre las superficies interior y exterior de la ventana como h1 = 10 W/m2 C y h2 = 25 W/m2 C

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