BS EN 14918:2009 PDF

Scope: This European Standard specifies a method for the determination of the gross calorific value of a solid biofuel at constant volume and at the reference temperature 25 °C 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, biofuels are burned at constant (atmospheric) pressure and the water is either not condensed (removed as vapour with the flue gases) or condensed. Under both conditions, the operative heat of combustion to be used is the net calorific value of the fuel at constant pressure. The net calorific value at constant volume may also be used; formulae are given for calculating both values. General principles and procedures for the calibrations and the biofuel experiments are presented in the main text, whereas those pertaining to the use of a particular type of calorimetric instrument are described in Annexes A to C. Annex D contains checklists for performing calibration and fuel experiments using specified types of calorimeters. Annex E gives examples to illustrate some of the calculations.

BS EN 14918:2009 Referenced Document

EN 14774-3 Solid biofuels - Determination of moisture content - Oven dry method - Part 3: Moisture in general analysis sample*， 2024-04-19 Update
EN ISO 10304-1 Water quality - Determination of dissolved anions by liquid chromatography of ions - Part 1: Determination of bromide, chloride, fluoride, nitrate, nitrite, phosphate and sulfate - Technical Corrigendum 1 (ISO 10304-1:2007/Cor 1:2010)*， 2012-02-29 Update
ISO 1770 Solid-stem general purpose thermometers; amendment 1
ISO 1771 Enclosed-scale general purpose thermometers; amendment 1
ISO 651 Solid-stem calorimeter thermometers
ISO 652 Enclosed-scale calorimeter thermometers

2017 BS EN ISO 18125:2017 Solid biofuels. Determination of calorific value
2010 BS EN 14918:2009 Solid biofuels - Determination of calorific value
2006 BS DD CEN/TS 14918:2005 Solid Biofuels — Method for the determination of calorific value