Question: how to calculate hhv of coal?
Answer: FORMULAS FOR CALCULATING THE HEATING VALUE OF COAL AND COAL CHAR: DEVELOPMENT, TESTS AND USES. ...  of the United States. Four formulas were selected for test. They are as follows: ...  Q = 145.44 C + 620.28 H + 40.5 S - 77.54 (0) Boie (11) Q = ...  9 = [ ~~ + 424.621 [C/3 + H -(0)/8 + s/8] Mott and Spooner (1,13)