Package Modelica.Fluid.Dissipation.PressureLoss.ValvePackage for pressure loss calculation of valves
Package Modelica.Fluid.Dissipation.PressureLoss.Valve
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_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 |
dp_severalGeometryOverall_MFLOW | Pressure loss of valve | calculate mass flow rate | several geometries | overall flow regime |
Function Modelica.Fluid.Dissipation.PressureLoss.Valve.dp_severalGeometryOverall_DP
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).
| Type | Name | Description |
|---|---|---|
dp_severalGeometryOverall_IN_con | IN_con | Input record for function dp_severalGeometryOverall_DP |
dp_severalGeometryOverall_IN_var | IN_var | Input record for function dp_severalGeometryOverall_DP |
MassFlowRate | m_flow | Mass flow rate |
| Type | Name | Description |
|---|---|---|
Pressure | DP | Pressure loss |
Function Modelica.Fluid.Dissipation.PressureLoss.Valve.dp_severalGeometryOverall_MFLOW
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).
| Type | Name | Description |
|---|---|---|
dp_severalGeometryOverall_IN_con | IN_con | Input record for function dp_severalGeometryOverall_MFLOW |
dp_severalGeometryOverall_IN_var | IN_var | Input record for function dp_severalGeometryOverall_MFLOW |
Pressure | dp | Pressure loss |
| Type | Name | Description |
|---|---|---|
MassFlowRate | M_FLOW | Mass flow rate |
Record Modelica.Fluid.Dissipation.PressureLoss.Valve.dp_severalGeometryOverall_IN_conThis record is used as input record for the pressure loss function dp_severalGeometryOverall_DP and dp_severalGeometryOverall_MFLOW.
Extends from Modelica.Icons.Record (Icon for records).
| Type | Name | Description |
|---|---|---|
ValveGeometry | geometry | Choice of geometry for valve |
ValveCoefficient | valveCoefficient | Choice of valve coefficient |
Real | Av | Av (metric) flow coefficient [Av]=m^2 |
Real | Kv | Kv (metric) flow coefficient [Kv]=m^3/h |
Real | Cv | Cv (US) flow coefficient [Cv]=USG/min |
Pressure | dp_nominal | Nominal pressure loss |
MassFlowRate | m_flow_nominal | Nominal mass flow rate |
Density | rho_nominal | Nominal inlet density |
Real | opening_nominal | Nominal opening |
Real | zeta_TOT_min | Minimal pressure loss coefficient at full opening |
Real | zeta_TOT_max | Maximum pressure loss coefficient at closed opening |
Pressure | dp_small | Linearisation for a pressure loss smaller then dp_small |
Record Modelica.Fluid.Dissipation.PressureLoss.Valve.dp_severalGeometryOverall_IN_varThis record is used as input record for the pressure loss function dp_severalGeometryOverall_DP and dp_severalGeometryOverall_MFLOW.
Extends from Modelica.Icons.Record (Icon for records).
| Type | Name | Description |
|---|---|---|
Real | opening | Opening of valve | 0==closed and 1== fully opened |
DynamicViscosity | eta | Dynamic viscosity of fluid |
Density | rho | Density of fluid |