19 Jun, 2018
Gas, Compressible Flow
- Accurate for both low and high velocity gas flow systems.
- Solves the conservation equations and an equation of state ensuring an accurate solution
- Auto-detection of choked flow conditions.
Here is an example of sizing a safety pressure relief valve to API Standards for a superheated steam system.
The required capacity in this case was 49,200 kg/h with a relieving temperature of 400oC and set pressure of 36.7 barg. When using the API sizing method, FluidFlow automatically suggests the next closest standard size orifice plate, in this case Standard Size “N”.
This is an example of a compressed air distribution system featuring three compressors and over 1,300 M of distribution pipework serving 25 demand points. Compressed air systems can be evaluated allowing you to ensure the required pressures and flow rates are achieved and maintained at the demand points. Line velocities and sizes are easily evaluated as well as fluctuating system demand conditions.
For gas flow within a pipe, the pressure and temperature conditions continuously change. This means that the gas physical properties of density, viscosity, heat capacity, thermal conductivity, sonic velocity, etc., change with pipe length.
The curve plot opposite clearly shows the change in gas density as the gas flows along a pipework segment. This underlines the importance of using the correct and appropriate calculation method. It is therefore clear that liquid pressure loss correlations are unsuitable for gas systems as there is considerable margin for error.
The FluidFlow3 Gas module uses specific gas correlations together with an equation of state to ensure the highest level of accuracy
19 Jun, 2018
26 Jun, 2018