doi:10.3969/j.issn.16715152.2012.07.003
张杨峻等·天然气高热值和华白数不同参比条件换算简析
天然气高热值和华白数不同参比条件换算简析
口同济大学机械与能源工程学院（201804）张杨竣秦朝葵
摘
要：天然气具有可压缩性，其热值和华白数等物理特性计算受到不同参比压力和温度条件的影响。目
前，全球各国天然气热值和华白数计算所采用燃烧参比条件和体积计量参比条件并不完全相同。如欧美国家多采用15℃（或者60°F）的参比温度，我国国标规定的参比温度为20℃，这导致在天然气贸易和气质管理时势必和其他国家存在差别。另一方面，国内一些燃气从业人员，对于天然气热值和华白数计算需以参比条件为依据进行并没有明确的概念，对不同参比条件下计算得到的数值差别很大并不了解或概念很模棚。本文通过系统的解释天然气高热值和华白数计算方法和不同参比条件下各计算结果的换算方法以及不同计量单位之间的换算，得出各参比条件和计量单位之间的换算系数。从而利于今后相关人员更有效的管理天然气高热值、华白数等重要物理特性，便于天然气的进口选择，同时尽可能保证各气源气质管理，使其进入城市燃气管网后彼此可互换而不引起高昂成本转化等问题。
关键调：高热值华白数参比条件换算系数
AnalysisonReferenceConditionforNaturalGasConversions IncludingWobbeIndexandSuperiorCalorificValueCalculations
Mechanical Engineering College, Tongji University Zhang Yangjun, Qin Chaokui
Abstract :As the gas is compressible, thus its calorific value and Wobbe Index are computed by the reference conditions.
At present, countries around the world use different referenoe conditions to calculate calorific value and Wobbe index of natural gas. Such as Europe and the United States which are like to define 15°C or 60°F as reference temperature, while China's national standard specifies reference temperature of 20°C. So there are differences between each other, which will lead the trade of natural gas between China and these countries appearing some problems. On the other hand, in China some domestic gas practitioners are not very clear about the concept of reference conditions, and don't realize the calculation of natural gas calorific value and Wobbe index must under certain temperature and pressure, Therefore, this paper systemically analyzes the theory of conversion including wobbe index and superior calorific value calculation on different reference conditions and concludes the conversion factor of different reference conditions and different units for natural gas wobbe index and superior calorific value calculation. By these conclusions, it is conducive to more effective on natural gas trade and gas quality management in China, as well as possible to ensure that the gas sources which enter into the city gas network will be interchangeable with each other without incurring the high cost of conversion and other issues.
Keywords:SuperiorCalorific
Wobbe Index
Reference Condition
Conversion Factor
2012/07总第449期113