燃气互换性几种常用判定方法的比较与选择

针对天然气置换人工煤气或液化石油气的工作正在我国各地相继展开,而国际上至今仍无法从理论上推导出计算燃气互换性公式的现状,指出有必要对燃气互换性判定作更进一步的研究.同时比较分析了A.G.A指数判定法等几种目前国际上常用的燃气互换性判定方法,列出其各自的互换条件和方法特点,并阐述了特定应用场合下不同判定法的恰当选择;最后以广州市正在置换的天然气和原人工燃气的互换性判定为例计算,验证了若只需单纯判定两种燃气能否互换,选用"I"指数判定法比图形判定法更方便.

Analysis on some familiar judgement methods about interchangeability of combustible gas

As original gas being replaced by NG in many places in our country,it is necessary for us to study further on interchangeability of combustible gas due to the fact that no researchers all over the world have found an exact expression to judge whether a kind of gas can safely replace another.In this paper,we discuss some common judgement methods such as A.G.A index law about interchangeability of combustible gas,and point out their characteristics.In addition,we also discuss how to select a better judgement method.At last,by taking the interchangeability example of original gas replaced by NG in Guangzhou,we validate "I" index-judgement method is more convenient than graph-judgement method while we only want to judge the interchangeability of two kinds of different gases.