国产成人亚洲综合无码18禁H_玖玖资源站无码社区_久久久综合色_日韩欧美中文电影_免费播放片ⅴ免费人成视频_刺激性视频黄页网站大全_亚洲欧美日韩中文字幕二_90后性网国产在线观看_国产免费日本视频_午夜福利欧洲在线

全國(guó)服務(wù)熱線: 010-68883817

18513498889 / 400-886-3817

ISO 18125:2017

2024-06-06 北京卓銳科技 0

ISO 18125:2017

Solid biofuels

Determination of calorific value

 

Status : Published

 This standard was last reviewed and confirmed in 2022. Therefore this version remains current.

 

 

Abstract

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.


標(biāo)簽: ISO 18125:2017