BS EN ISO 18125:2017规定了一种在室温下测定固体生物燃料总热值的方法 在基准温度25°C下，在燃烧校准的弹式量热计中保持恒定体积 经认证的苯甲酸。得到的结果是分析样品在恒定体积下的总热值，包括 燃烧产物中的水是液态水。实际上，生物燃料的燃烧温度是恒定的 （大气）压力，水或未冷凝（与烟气一起以蒸汽形式排出） 或者浓缩。在这两种情况下，使用的有效燃烧热为净发热量 恒定压力下的燃油值。也可以使用恒定体积下的净热值； 给出了计算这两个值的公式。校准和生物燃料实验的一般原则和程序见 主要文本，而那些与使用特定类型的量热仪器有关的文本 附录A至附录C中描述了这些参数。附录D包含执行校准和燃油消耗的检查表 使用特定类型的量热计进行实验。附件E给出了一些例子来说明一些问题 计算。交叉引用:ISO 1770ISO 14780:2017ISO 1771ISO 652ISO 651ISO 16559: 2014 ED1ISO 16994:2016ISO 18134-3:2015ISO 18135:2017ISO 16948:2015 ED1ISO 18122:2015ISO 1928:2009 Ed 3ISO 18134-2:2017ISO 10304-1:2007 Ed 2ISO 18134-1:2015ISO 17225-1:2014 ED1ISO 16993:2016购买本文件时提供的所有当前修订版均包含在购买本文件中。

BS EN ISO 18125:2017 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.Cross References:ISO 1770ISO 14780:2017ISO 1771ISO 652ISO 651ISO 16559:2014 ED1ISO 16994:2016ISO 18134-3:2015ISO 18135:2017ISO 16948:2015 ED1ISO 18122:2015ISO 1928:2009 Ed 3ISO 18134-2:2017ISO 10304-1:2007 Ed 2ISO 18134-1:2015ISO 17225-1:2014 ED1ISO 16993:2016All current amendments available at time of purchase are included with the purchase of this document.