水蒸气流量测量的温度压力补偿计算

Temperature and Pressure Compensation Calculation on Steam Flow Measurement

介绍了水蒸气流量测量温压补偿的2种方法及流量温压补偿的原理,通过研究水蒸气密度的计算方法,对比分析计算误差,给出了计算水蒸气密度的推荐公式,并由此得出水蒸气流量测量的温压补偿计算公式。同时研究了过热水蒸气压缩系数的2种计算方法,利用Matlab编制计算程序,给出了计算压缩系数的推荐公式,探讨了实际气体状态方程是否适用于水蒸气的问题。

Two measuring methods and principle of temperature and pressure compensation of steam flow are introduced. By studying calculation methods of steam density, and comparing and analyzing calculation error, one recommendable calculation method of steam density is proposed.Computational formula for temperature and pressure compensation for steam flow measurement is obtained. Two kinds of calculation method of compressibility of superheated steam are studied at the same time. A recommendable calculation method is given with the calculation programs compiled with Matlab. Whether actual gas state equation could be applied to steam is discussed.