Question: how to calculate hhv of a fuel?
Answer: Insert the values into the following equation, which was calculated to be the best fit for a variety of materials in solid, liquid or gaseous form according to Drs. Channiwala and Parikh as reported in the journal Fuel in 2002. HHV= 0.3491(C) + 1.1783(H) + 0.1005(S) + 0.1034(O) + 0.0151(N) +0.021(A).