dp_severalGeometryOverall_DP
dp_severalGeometryOverall_MFLOW
dp_severalGeometryOverall_IN_con
dp_severalGeometryOverall_IN_var
Package for pressure loss calculation of valves
Calculation of pressure loss for a valve with different geometries at overall flow regime for incompressible and single-phase fluid flow in dependence of its opening. See more information.
Extends from Modelica.Icons.VariantsPackage (Icon for package containing variants).
| Name | Description |
|---|---|
| dp_severalGeometryOverall_DP
|
Pressure loss of valve | calculate pressure loss | several geometries | overall flow regime |
| dp_severalGeometryOverall_MFLOW
|
Pressure loss of valve | calculate mass flow rate | several geometries | overall flow regime |
| dp_severalGeometryOverall_IN_con
|
Input record for function dp_severalGeometryOverall_DP and dp_severalGeometryOverall_MFLOW |
| dp_severalGeometryOverall_IN_var
|
Input record for function dp_severalGeometryOverall_DP and dp_severalGeometryOverall_MFLOW |
Modelica.Fluid.Dissipation.PressureLoss.Valve.dp_severalGeometryOverall_DPPressure loss of valve | calculate pressure loss | several geometries | overall flow regime
Calculation of pressure loss for a valve with different geometries at overall flow regime for incompressible and single-phase fluid flow in dependence of its opening.
Generally this function is numerically best used for the incompressible case, where the mass flow rate (m_flow) is known (as state variable) in the used model and the corresponding pressure loss (DP) has to be calculated. On the other hand the function dp_severalGeometryOverall_MFLOW is numerically best used for the compressible case if the pressure loss (dp) is known (out of pressures as state variable) and the mass flow rate (M_FLOW) has to be calculated. See more information.
Extends from Modelica.Icons.Function (Icon for functions).
| Name | Description |
|---|---|
| Constant inputs | |
| IN_con | Input record for function dp_severalGeometryOverall_DP |
| Variable inputs | |
| IN_var | Input record for function dp_severalGeometryOverall_DP |
| Input | |
| m_flow | Mass flow rate [kg/s] |
| Name | Description |
|---|---|
| DP | Pressure loss [Pa] |
Modelica.Fluid.Dissipation.PressureLoss.Valve.dp_severalGeometryOverall_MFLOWPressure loss of valve | calculate mass flow rate | several geometries | overall flow regime
Calculation of pressure loss for a valve with different geometries at overall flow regime for incompressible and single-phase fluid flow in dependence of its opening.
Generally this function is numerically best used for the compressible case, where the pressure loss (dp) is known (out of pressures as state variable) in the used model and the corresponding mass flow rate (M_FLOW) has to be calculated. On the other hand the function dp_severalGeometryOverall_DP is numerically best used for the incompressible case if the mass flow rate (m_flow) is known (as state variable) and the pressure loss (DP) has to be calculated. See more information.
Extends from Modelica.Icons.Function (Icon for functions).
| Name | Description |
|---|---|
| Constant inputs | |
| IN_con | Input record for function dp_severalGeometryOverall_MFLOW |
| Variable inputs | |
| IN_var | Input record for function dp_severalGeometryOverall_MFLOW |
| Input | |
| dp | Pressure loss [Pa] |
| Name | Description |
|---|---|
| M_FLOW | Mass flow rate [kg/s] |
Modelica.Fluid.Dissipation.PressureLoss.Valve.dp_severalGeometryOverall_IN_conInput record for function dp_severalGeometryOverall_DP and dp_severalGeometryOverall_MFLOW
Extends from Modelica.Icons.Record (Icon for records).
| Name | Description |
|---|---|
| Valve | |
| geometry | Choice of geometry for valve |
| valveCoefficient | Choice of valve coefficient |
| Av | Av (metric) flow coefficient [Av]=m^2 |
| Kv | Kv (metric) flow coefficient [Kv]=m^3/h |
| Cv | Cv (US) flow coefficient [Cv]=USG/min |
| dp_nominal | Nominal pressure loss [Pa] |
| m_flow_nominal | Nominal mass flow rate [kg/s] |
| rho_nominal | Nominal inlet density [kg/m3] |
| opening_nominal | Nominal opening |
| zeta_TOT_min | Minimal pressure loss coefficient at full opening |
| zeta_TOT_max | Maximum pressure loss coefficient at closed opening |
| Linearisation | |
| dp_small | Linearisation for a pressure loss smaller then dp_small [Pa] |
Modelica.Fluid.Dissipation.PressureLoss.Valve.dp_severalGeometryOverall_IN_varInput record for function dp_severalGeometryOverall_DP and dp_severalGeometryOverall_MFLOW
Extends from Modelica.Icons.Record (Icon for records).
| Name | Description |
|---|---|
| Valve | |
| opening | Opening of valve | 0==closed and 1== fully opened |
| Fluid properties | |
| eta | Dynamic viscosity of fluid [Pa.s] |
| rho | Density of fluid [kg/m3] |