天然气高位发热量和低位发热量计算说明.docx

1、天然气高位发热量和低位发热量计算说明气体高位发热量HSjkJ/mol摩尔分数Xj摩尔分数x发热量HSjXjkJ/mol体积发热用HSMJ/m3体积分数Vj压缩因子Cj体积分数/压缩因子Vj/CjCH4891.090.9512847.5837.5095.1490.99895.330127C2H61561.410.021934.162.17510.9922.1925403C3H82220.130.005011.130.4940.9830.5023388NC4H102878.570.00102.790.09444.9680.0970874IC4H102869.380.00082.360.0820.9

2、710.0823893NC5H103537.170.00020.860.0230.9450.0243386C5H103530.240.00031.030.0280.9530.0293809C6+4196.580.00052.230.0490.9190.0533188N200.01240.001.2460.9991.2463739CO200.00660.000.66270.9940.6657281Z1902.14100100.22362气体低位发热量HljkJ/mol摩尔分数Xj摩尔分数x发热量HljXjkJ/mol体积发热用HI3MJ/m3体积分数Vj压缩因子Cj体积分数/压缩因子Vj/CjC

3、H4802.650.9511763.4433.8295.1490.99895.330127C2H61428.740.021931.272.17510.9922.1925403C3H82043.230.005010.250.4940.9830.5023388NC4H102657.450.00102.580.09444.9680.0970874IC4H102648.260.00082.180.0820.9710.0823893NC5H103271.830.00020.800.0230.9450.0243386C5H103264.890.00030.960.0280.9530.0293809C6+3

4、887.010.00052.080.0490.9190.0533188N200.01240.001.2460.9991.2463739CO200.00660.000.6620.99440.6657281Z1813.57100才100.223621、计算混合物中第j种组分的“体积分数/压缩因子（V/Cj）”，“压缩因子”的物理意义为实际气体体积分数与理想气体体积分数的差别，体积分数/压缩因子（V/Cj）”就相当于把实际气体体积分数折算成理想气体体积分数。2、计算混合物中第j种组分的“摩尔分数X/Xj3、Cj1厂Vjzj=1计算1mol混合物中第j种组分的高位发热量4、计算1 mol混合物的高位发

5、热量。io(HSj Xj)j 45、计算在P压力、T温度下的高位体积发热量，计算公式HS 8.31451 T10、(HSj Xj)j 4MJ/m式中：8.31451为天然气混合物的气体常数R6计算在P压力、T温度下的低位体积发热量，与高位体积发热量相似，从步骤5,只不过把步骤3、4、5中的高位发热量换成低位发热量。1至9步骤性能计算中用到的是天然气的低位发热量，燃烧室的能量平衡关系公式为:-L-nui(3.9)HSj次j式中:瞬焉-燃烧室的空气摩尔流量- 压气机出口空气焰- 燃烧室的燃料摩尔流量-燃料的低位发热量- 燃烧室的燃烧效率,一.*-燃气透平进口燃气焰上式中燃料的低位发热量Qi单位为MJ/kMol所以Qi=HI22.4L/Mo八36.37MJ/rn22.4L/Mol=814.688MJkMo,l其中22.4L/Mol为天然气在标准状态下的摩尔体积。