ISO 18125:2017
Solid biofuels - Determination of calorific value
- Standard No.
- ISO 18125:2017
- Release Date
- 2017
- Published By
- International Organization for Standardization (ISO)
- Latest
- ISO 18125:2017
- Scope
- This document 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.
ISO 18125:2017 Referenced Document
- ISO 10304-1:2007 Water quality - Determination of dissolved anions by liquid chromatography of ions - Part 1: Determination of bromide, chloride, fluoride, nitrate, nitrite, phosphate and sulfate
- ISO 14780:2017 Solid biofuels - Sample preparation
- ISO 16559:2014 Solid biofuels - Terminology, definitions and descriptions
- ISO 16948:2015 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen
- ISO 16993:2016 Solid biofuels - Conversion of analytical results from one basis to another
- ISO 16994:2016 Solid biofuels - Determination of total content of sulfur and chlorine
- ISO 17225-1:2014 Solid biofuels - Fuel specifications and classes - Part 1: General requirements
- ISO 1770:1981 Solid-stem general purpose thermometers
- ISO 1771:1981 Enclosed-scale general purpose thermometers
- ISO 18122:2015 Solid biofuels - Determination of ash content
- ISO 18134-1:2015 Solid biofuels - Determination of moisture content - Oven dry method - Part 1: Total moisture - Reference method
- ISO 18134-2:2017 Solid biofuels - Determination of moisture content - Oven dry method - Part 2: Total moisture - Simplified method
- ISO 18134-3:2015 Solid biofuels - Determination of moisture content - Oven dry method - Part 3: Moisture in general analysis sample
- ISO 18135:2017 Solid Biofuels - Sampling
- ISO 1928:2009 Solid mineral fuels - Determination of gross calorific value by the bomb calorimetric method and calculation of net calorific value
- ISO 651:1975 Solid-stem calorimeter thermometers
- ISO 652:1975 Enclosed-scale calorimeter thermometers
ISO 18125:2017 history
- 2017 ISO 18125:2017 Solid biofuels - Determination of calorific value
