Safety valve calculation
Thread Content
For the calculation of the safety valve for a 0.7MPa 45-degree methanol storage tank, should it be based on liquid properties or gas properties?
It is related to the critical temperature and pressure of the medium
It should be based on the liquid; the source of pressure should be pump pressure.
At 0.7 MPa, the saturation temperature of methanol is 128 degrees Celsius; therefore, it is in liquid form at 45 degrees
The temperature does not correspond to the saturation temperature at that pressure; communicate with the user to determine whether it is simply a matter of the medium used
The standard boiling point of methanol is 64.7 degrees. Under the conditions mentioned by the original poster, everything is in liquid form. The saturated vapor pressure at 45 degrees is 47.9 KPa; therefore, the original poster needs to figure out first where this pressure of 0.7 MPa comes from