This is complicated by the fact that there are two different ways to measure the fuel energy input LCV = Lower Calorific Value, which is the same as NCV = Net Calorific Value, or, HCV = Higher Calorific Value which is the same as GCV, Gross Calorific Value.
2.
LHV calculations assume that the water component of a combustion process is in vapor state at the end of combustion, as opposed to the higher heating value ( HHV ) ( a . k . a . " gross calorific value " or " gross CV " ) which assumes that all of the water in a combustion process is in a liquid state after a combustion process.
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