Package Modelica.​Fluid.​Dissipation.​PressureLoss.​Valve
Package for pressure loss calculation of valves

Information

Valve

Several geometries

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).

Package Contents

NameDescription
dp_severalGeometryOverall_DPPressure loss of valve | calculate pressure loss | several geometries | overall flow regime
dp_severalGeometryOverall_IN_conInput record for function dp_severalGeometryOverall_DP and dp_severalGeometryOverall_MFLOW
dp_severalGeometryOverall_IN_varInput record for function dp_severalGeometryOverall_DP and dp_severalGeometryOverall_MFLOW
dp_severalGeometryOverall_MFLOWPressure loss of valve | calculate mass flow rate | several geometries | overall flow regime

Function Modelica.​Fluid.​Dissipation.​PressureLoss.​Valve.​dp_severalGeometryOverall_DP
Pressure loss of valve | calculate pressure loss | several geometries | overall flow regime

Information

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).

Inputs

TypeNameDescription
dp_severalGeometryOverall_IN_conIN_conInput record for function dp_severalGeometryOverall_DP
dp_severalGeometryOverall_IN_varIN_varInput record for function dp_severalGeometryOverall_DP
MassFlowRatem_flowMass flow rate

Outputs

TypeNameDescription
PressureDPPressure loss

Function Modelica.​Fluid.​Dissipation.​PressureLoss.​Valve.​dp_severalGeometryOverall_MFLOW
Pressure loss of valve | calculate mass flow rate | several geometries | overall flow regime

Information

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).

Inputs

TypeNameDescription
dp_severalGeometryOverall_IN_conIN_conInput record for function dp_severalGeometryOverall_MFLOW
dp_severalGeometryOverall_IN_varIN_varInput record for function dp_severalGeometryOverall_MFLOW
PressuredpPressure loss

Outputs

TypeNameDescription
MassFlowRateM_FLOWMass flow rate

Record Modelica.​Fluid.​Dissipation.​PressureLoss.​Valve.​dp_severalGeometryOverall_IN_con
Input record for function dp_severalGeometryOverall_DP and dp_severalGeometryOverall_MFLOW

Information

This 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).

Fields

TypeNameDescription
ValveGeometrygeometryChoice of geometry for valve
ValveCoefficientvalveCoefficientChoice of valve coefficient
RealAvAv (metric) flow coefficient [Av]=m^2
RealKvKv (metric) flow coefficient [Kv]=m^3/h
RealCvCv (US) flow coefficient [Cv]=USG/min
Pressuredp_nominalNominal pressure loss
MassFlowRatem_flow_nominalNominal mass flow rate
Densityrho_nominalNominal inlet density
Realopening_nominalNominal opening
Realzeta_TOT_minMinimal pressure loss coefficient at full opening
Realzeta_TOT_maxMaximum pressure loss coefficient at closed opening
Pressuredp_smallLinearisation for a pressure loss smaller then dp_small

Record Modelica.​Fluid.​Dissipation.​PressureLoss.​Valve.​dp_severalGeometryOverall_IN_var
Input record for function dp_severalGeometryOverall_DP and dp_severalGeometryOverall_MFLOW

Information

This 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).

Fields

TypeNameDescription
RealopeningOpening of valve | 0==closed and 1== fully opened
DynamicViscosityetaDynamic viscosity of fluid
DensityrhoDensity of fluid

Generated 2018-12-12 12:13:30 EST by MapleSim.