Pressure/Enthalpy Diagram's

skaboy607

Hi,

I'm using a Pressure/Enthalpy diagram for R12. I have drawn my cycle on and found values for H1, H2, and H4=H5. I woud like to know how to calculate V. The graph has some lines which appear to read Log10V=-1 but these lines don't pass throught the point that I would like to know. I would also like to calculate H2' but am unsure how to do this. An equation for Torque that I have is T=0.15*F. Where do I get the value for F?

Thanks for your help.

Will