Question

# (Heating Transfer) - A wall with a heat transmission coefficient of 2 W / mK; thickness,...

(Heating Transfer)

- A wall with a heat transmission coefficient of 2 W / mK; thickness, width and height values ​​are all 1 m (wall thickness 1 m and heat transfer area 1 mx 1 m = 1 m ^ 2) In the continuous regime, the relevant wall with inner surface temperature of 2000 K and outer surface temperature of 1000 K , unit Calculate the heat passing in time.

(Admissions: one dimensional heat conduction and constant heat conduction coefficient in the wall)

 Given 1 Heat transfer coefficent - k = 2 W /mK 2 Area of wall- heat transfer area = 1 m^2 3 Thickness of wall - L = 1 m 4 Temperature of inner surface = T1 = 2000 K 5 Outer surface temperature = T2 = 1000K To find out Heat transfer   -- Ans Heat transfer due to condution Qcon = k A dT / L = k A (T1-T2)/ L = 2 x 1 x (2000-1000) / 1 = 2 x 1 x 1000 = 2000 Watt Thus heat passing in time = 2000 Watt

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