Which of the following is correct statement?
1
The lower heating value, LHV, is obtained when the water formed by combustion exists completely in the solid phase.
2
Calorific value is expressed in kJ/m3 for solid fuels.
3
The higher heating value, HHV, is obtained when the water formed by combustion is completely condensed.
4
Calorific value is expressed in kJ/kg for gases.