Question

calculate tha height of chimny required to produce a draught equivalent to 1.7 cm of water if tha flue gas temperature is 270℃ and ambient temperature is 22℃ and minimum amount of air per kg of fuel is 17kg​

Answer 1

calculate tha height of chimny required to produce a draught equivalent to 1.7 cm of water if tha flue gas temperature is 270℃ and ambient temperature is 22℃ and minimum amount of air per kg of fuel is 17kg

Answer 2

Answer:

The height of the chimney is 33.33m

Explanation:

Given that,

The draught equivalent of water is h=1.7cm=17mm

The fuel gas temperature is 270°C hence it is

$T_{g}=543K$

The ambient temperature is 22°C hence it is

$T_{a}=295K$

Also,the minimum amount of air per kg of fuel is m=17kg.

We are required to find the height if chimney.For that we use relation

$h = 353( \frac{1}{T _{a}} - ( \frac{m + 1}{m}) \frac{1}{T _{g} } )H$

Substituting the given values we get

$17 = 353( \frac{1}{295} - ( \frac{17 + 1}{17} ) \frac{1}{543} )H \\ = > 0.0481 = (0.003389 - 0.001945)H \\ = > H = 33.33m$

Therefore,The height of the chimney is found to be 33.33m

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