摘要
目前在理论上通过vdW物态方程得到的气体反转曲线与实验测定的气体反转曲线仅在定性上符合,但在定量上是不正确的,事实上既便在定性上误差也是比较大的.通过计算和分析得到了Dieterici实际气体转换温度与压强的函数关系式;并应用Matlab计算机模拟仿真技术绘制出Dieterici实际气体反转曲线;将它与vdW气体反转曲线和实验测定的气体反转曲线进行对比分析,进而说明了Dieterici物态方程在气体液化等低温领域中描述气体的行为还是比较准确的;特别指出的是在压强较低的范围内,Dieterici实际气体反转曲线与实验测定的气体反转曲线几乎重合,进而说明了Dieterici气体转换温度与实际气体转换温度吻合得相当好.
The inversion curve of gas obtained by vdW equation traditionally is conformable to that measured by experiment only qualitatively, but not quantitatively. In fact, its error is relatively big even qualitatively. A transition temperature dependences of pressure of Dieterici real gas was obtained by analysis and calculation. A inversion curve of Dieterici real gas attained by simulation on Metlab computer was compared with that of vdW gas and that of gas from experimental measuring, respectively; It is further explained that Dieterici equation of mass state is also accurate enough when it describes behavior of gas within low temperature field like liquefied gas. Particularly, it is pointed out that within low pressure range, the inversion curve of Dieterici real gas is mostly overlapped with that of gas from experimental measuring.
出处
《沈阳工业大学学报》
EI
CAS
2006年第2期236-238,共3页
Journal of Shenyang University of Technology
关键词
vdW物态方程
Dieterici物态方程
焦-汤系数
节流膨胀法
转换温度
反转曲线
临界参量
vdW equation of mass state
Dieterici equation of mass state
Joule-Thomson coeffident
liquefactionby throttling expansion
transition tempezature
inversion curve
critical parameters
