modelParallelPipes
Extends from BuildingSystems.Fluid.Interfaces.PartialFourPort.
Information
Model of two pipes in parallel
Parameters
| Type | Name | Default | Description |
|---|
| Integer | nNodes | integer(ceil(length/100)) | Number of volume segments |
| Modelica.Units.SI.Length | length | | Length of the pipe |
| Boolean | InteractionBetweenPipes | false | = false to neglect interaction between pipes |
| Nominal condition |
| Modelica.Units.SI.MassFlowRate | m_flow_nominal | | Nominal mass flow rate |
| Initialitzation |
| Modelica.Media.Interfaces.Types.AbsolutePressure | p_start | Medium.p_default | Start value of pressure |
| Modelica.Media.Interfaces.Types.Temperature | T_start_supply | 273.15 + 90 | Start value of temperature |
| Modelica.Media.Interfaces.Types.Temperature | T_start_return | 273.15 + 50 | Start value of temperature |
| Assumptions |
| Boolean | allowFlowReversal | true | = true to allow flow reversal, false restricts to design direction (port_a -> port_b) |
| Flow resistance |
| Boolean | from_dp | false | = true, use m_flow = f(dp) else dp = f(m_flow) |
| Boolean | linearizeFlowResistance | false | = true, use linear relation between m_flow and dp for any flow rate |
| Real | deltaM | 0.1 | Fraction of nominal flow rate where flow transitions to laminar |
| Modelica.Units.SI.ReynoldsNumber | ReC | 4000 | Reynolds number where transition to turbulent starts |
Components
| Type | Name | Default | Description |
|---|
| BuildingSystems.Fluid.FixedResistances.Pipe | pipSupply | | |
| BuildingSystems.Fluid.FixedResistances.Pipe | pipReturn | | |
| Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_a | port_a | | |
| BuildingSystems.Technologies.DistrictHeatingNetworks.UndergroundPipes.BaseClasses.Qmodel | qmodel | | |
| BuildingSystems.Technologies.DistrictHeatingNetworks.UndergroundPipes.BaseClasses.DHN_Umodels.UPartialClass | Umodel | | |
Contents
| Name | Description |
|---|
| Medium | Medium in the component |