Find the interface temperature for the pine and insulation

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Reference no: EM13339712

A) A room with a pine ceiling measured 13 m x 6 m x 4 cm thick. On a cold day the temperature on inside of the ceiling is T1 = 22 oC and in the attic T2 = 2 oC. If a 4 cm piece of insulation is added to the pine ceiling kpine = 0.120 J/msC kinsul = 0.042 J/msC If a 4 cm piece of insulation is added to the pine ceiling , find the interface temperature for the pine and insulation. Ti =

B) A room with a pine ceiling measured 13 m x 6 m x 4 cm thick. On a cold day the temperature on inside of the ceiling is T1 = 22 oC and in the attic T2 = 2 oC. If a 4 cm piece of insulation is added to the pine ceiling kpine = 0.120 J/msC kinsul = 0.042 J/msC If 4 cm of insulation is added to the pine ceiling how much heat does the layer of pine / insulation transmit in one hour. Heat lost in one hour = _____Joules ?

C) A room with a pine ceiling measured 13 m x 6 m x 4 cm thick. On a cold day the temperature on inside of the ceiling is T1 = 22 oC and in the attic T2 = 2 oC. If a 4 cm piece of insulation is added to the pine ceiling kpine = 0.120 J/msC kinsul = 0.042 J/msC If 4 cm piece of insulation is added to the pine ceiling, find the % decrease in heat loss , once the insulation has been installed. Efficiency= ___%?

Reference no: EM13339712

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