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Air at 20°C blows over a hot plate of 50×60 cm made of carbon steel maintained at 220°C. The convective heat transfer coefficient is 25 W/m²K.
What will be the heat loss from the plate?
- a)1500 W
- b)2500 W
- c)3000 W
- d)4000 W
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Air at 20°C blows over a hot plate of 50×60 cm made of carbon steel m...
Convective heat loss will take place from the one side of the plate since it is written that air blows over the hot plate
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Q = hA (T1 - T2)
= 25 x (0.5 x 0.6)(220 - 20)
= 25 x (0.3)(200) = 1500 W
Most Upvoted Answer
Air at 20°C blows over a hot plate of 50×60 cm made of carbon steel m...
Heat loss from the plate can be calculated using the equation:
Q = h * A * ΔT
Where:
Q is the heat loss
h is the convective heat transfer coefficient
A is the surface area of the plate
ΔT is the temperature difference between the plate and the surrounding air.
Given data:
Air temperature, Ta = 20°C
Plate temperature, Tp = 220°C
Convective heat transfer coefficient, h = 25 W/m²K
Plate dimensions, L = 50 cm, W = 60 cm
First, we need to convert the dimensions of the plate from cm to meters:
L = 50 cm = 0.5 m
W = 60 cm = 0.6 m
Now, we can calculate the surface area of the plate:
A = L * W = 0.5 m * 0.6 m = 0.3 m²
Next, we calculate the temperature difference:
ΔT = Tp - Ta = 220°C - 20°C = 200°C
Now, we can substitute these values into the equation to find the heat loss:
Q = 25 W/m²K * 0.3 m² * 200°C
= 1500 W
Therefore, the heat loss from the plate is 1500 W, which corresponds to option 'A'.
Q = h * A * ΔT
Where:
Q is the heat loss
h is the convective heat transfer coefficient
A is the surface area of the plate
ΔT is the temperature difference between the plate and the surrounding air.
Given data:
Air temperature, Ta = 20°C
Plate temperature, Tp = 220°C
Convective heat transfer coefficient, h = 25 W/m²K
Plate dimensions, L = 50 cm, W = 60 cm
First, we need to convert the dimensions of the plate from cm to meters:
L = 50 cm = 0.5 m
W = 60 cm = 0.6 m
Now, we can calculate the surface area of the plate:
A = L * W = 0.5 m * 0.6 m = 0.3 m²
Next, we calculate the temperature difference:
ΔT = Tp - Ta = 220°C - 20°C = 200°C
Now, we can substitute these values into the equation to find the heat loss:
Q = 25 W/m²K * 0.3 m² * 200°C
= 1500 W
Therefore, the heat loss from the plate is 1500 W, which corresponds to option 'A'.
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Air at 20°C blows over a hot plate of 50×60 cm made of carbon steel maintained at 220°C. The convective heat transfer coefficient is 25 W/m²K.What will be the heat loss from the plate?a)1500 Wb)2500 Wc)3000 Wd)4000 WCorrect answer is option 'A'. Can you explain this answer?
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