Higher calorific value (HHV) from lower calorific value + latent heat of water-vapour formed during combustion.
Formula
$$ HHV = LCV + 0.2122 \cdot H% $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $LCV$ | Lower (net) calorific value | MJ/kg | ISO 8217 |
| $H$ | Hydrogen mass % | % m/m | ultimate analysis |
| $HHV$ | Higher (gross) calorific value | MJ/kg | result |
Sources
- ASTM D240 / ISO 1928.