Problem and solutions

(1) Calculate the gross and net calorific value of a coal which analyses:,, , , , moisture and ash .

Solution

(2) The ultimate analysis of a coal(moist basis in %): C 69.8 , H 4.6 , N 1.4, O 8.5, S 2.5, H₂O 4.5 and ash 8.7. The gross calorific       value, moist basis, is 29920 KJ/Kg. Calculate, by means of the Dulong formula, the gross calorific value, moist basis, of the coal.

Solution