This International Standard specifies a method for the determination of the gross calorific value of a solid mineral fuel at constant volume and at the reference temperature 25 ºC in a bomb calorimeter calibrated by combustion of certified benzoic acid.The result obtained is the gross calorific value of the analysis sample at constant volume with all the water of the combustion products as liquid water. In practice, fuel is burned at constant (atmospheric) pressure and the water is not condensed but is removed as vapour with the flue gases. Under these conditions, the operative heat of combustion is the net calorific value of the fuel at constant pressure.
DS/ISO 1928:2009 history
2009DS/ISO 1928:2009 Solid mineral fuels - Determination of gross calorific value by the bomb calorimetric method and calculation of net calorific value
1980DS/ISO 1928:1980 Solid mineral fuels. Determination of gross calorific value by the calorimeter bomb method, and calculation of net calorific value