Question

(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)

Answer 1

	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