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本文介绍了一种确定实际操作工况下天然气含水量的简便方法。这个方法可以可靠地在工艺设计中用于确定天然气管线和处理设施中常见的贫的无硫气体中的含水量。与以前的常用算法相比。这个方法用于复杂气体混合物时仍有相当好的精度。对于天然气工业中常见的含有少量CO2和H2S的酸性气体，使用这种方法也是可靠的。使用本文介绍的解析形式的相关关系式计算天然气含水量时，其相对于Mcketta和Wehe相关曲线的平均误差只有±4％。而Behr相关关系式的平均误差为6％。新的相关关系式简单，便于使用，不需要使用冗长的迭代方法计算系统压力下一定含水量的天然气温度。使用这一新的相关关系式试算压力为300～1200psia，温度不超过180F的天然气时，得到了令人满意的结果。此外还用文献中的试验数据将这个新的相关关系式与其它方法进行了对比。还用这个新关系式具体计算了管线平衡计算过程中的露点温度。
This article describes a simple way to determine the moisture content of natural gas under real operating conditions. This method can reliably be used in process design to determine the water content in the lean, sulfur-free gas, which is common in natural gas pipelines and processing facilities. Compared with the previous common algorithm. This method still has reasonably good accuracy when used with complex gas mixtures. This method is also reliable for sour gas, which is common in the gas industry and contains small amounts of CO2 and H2S. When calculating the moisture content of natural gas using the analytic correlations described in this article, the average error relative to the Mcketta and Wehe correlation curves is only ± 4%. The average error of the Behr correlation is 6%. The new correlation is simple and easy to use, eliminating the need to use lengthy iterations to calculate the temperature of the natural gas at a given water content under system pressure. Satisfactory results have been obtained when using this new correlation to try natural gas at pressures of 300-1200 psia and temperatures of up to 180F. In addition, the new correlation was compared with other methods using the experimental data in the literature. The new relationship is also used to specifically calculate the dew point temperature during the pipeline balance calculation.