Vg和Vl 分别为饱和蒸汽和饱和液体的体积,x为湿蒸汽干度,则湿蒸汽的体积V为:
·V= x(Vg- Vl) + Vg
·V= (Vg- Vl) + x Vl
·V= x(Vg- Vl) +Vl
·V=(1-x)Vg+ x Vl