Question #124347

CONSIDER A CHIMNEY

Boiler uses 20kg of Air per kg of fuel Calculate the minimum height of chimney required to produce a draught of 30mm of water

The mean temperature of chimney gases is 290°c and that of outside is 27°c

Boiler uses 20kg of Air per kg of fuel Calculate the minimum height of chimney required to produce a draught of 30mm of water

The mean temperature of chimney gases is 290°c and that of outside is 27°c

Expert's answer

Given H = ?, *T*_{2} = 290^{0} C = 290 +273 = 563 K; *T*_{1} = 27^{0} C = 27 +273 = 300 K; *m* = 20 kg ; h = 30 mm

Solution

h = 353 H ( 1/T_{1} - (m+1/mT_{2})

30 = 353 H ( 1/300 - (20+1)/20*563)

H = 57.88 mm minimum height of chimney

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