Question

The corrected formula for calculation of Gross calorific value by Bomb calometers

O GCV= (W+w) (t2-t1 + tc) + (ta + tf) calgm
O GCV= (W + w) (t2- 11 - tc) + (ta +ti) caligm
O GCV=(W + w)(12 - 11 * 1c) – (ta - tf) cal gm
O None of the above
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Answer 1

Hieeee....

The former is calculated from a known hydrogen content of the coal: Net calorific value = gross calorific value − 586 (water as moisture + water formed from H2) cal/g.

Answer 2

Option (a) The corrected formula for calculation of Gross calorific value by Bomb calorimeter is given by$GCV= (W+w) (t2-t1 + tc) + (ta + tf) calgm$

Explanation:

• A bomb calorimeter is used to measure the calorific value of the fuel.
• An oxygen bomb calorimeter is used to measure the heat obtained from the fuel sample.
• Here the obtained heat is compared with the combustion of the reference sample.
• A known amount of the sample is burnt in the high-pressure oxygen atmosphere inside a bomb or a vessel.
• Net calorific or gross calorific value is measured with the help of a bomb calorimeter.
• The value is determined with the formula
• Net calorific value = gross calorific value − 586 (water as moisture + water formed from H2) cal/g.