Referencing the boiler efficiency to the GCV of the fuel rather than the NCV gives a more accurate picture and draws our attention to the enthalpy losses. While measuring the energy content of the fuel we assume that it is limited to the heat energy released directly. However a part of the heat energy in the fuel is also used to convert the ...
Occasionally for gas fuels calorific value is quoted on a volumetric basis (Formula F7.2) having units of either kJ/m 3 or kl/scm. The scm (standard cubic meter) is the amount of gas that would occupy 1 m 3 at the ISO pressure and temperature of 101.325 kPa and 288.15 K respectively. Formula F7.3 shows how the number of scm present in a volume of gas …
Energy content or calorific value is the same as the heat of combustion, and can be calculated from thermodynamical values, or measured in a suitable apparatus:. A known amount of the fuel is burned at constant pressure and under standard conditions (0°C and 1 bar) and the heat released is captured in a known mass of water in a calorimeter. If the …