density_derp_hDensity derivative by pressure | use setState_phX function for input |
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Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
This function calculates the density derivative w.r.t. absolute pressure at constant specific enthalpy of R134a (e.g., use setState_phX function for input). The derivative is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994). It can be used for manual state transformations (e.g. from density to pressure).
Syntax
ddph = density_derp_h(state)
Inputs (1)
| state |
Type: ThermodynamicState Description: Thermodynamic state record |
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Outputs (1)
| ddph |
Type: DerDensityByPressure (s²/m²) Description: Density derivative w.r.t. pressure |
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