| Integer | nLev (from LumpedMultiVolumeDeclarations) | 2 | Number of grid levels |
| Medium.SpecificEnthalpy | h_start (from LumpedMultiVolumeDeclarations) | Medium.specificEnthalpy(state = Medium.setState_pTX(p = p_start, T = T_start, X = X_start)) | |
| Integer | nSeg (from BasePipeMulti) | 1 | Number of volume segments |
| Modelica.SIunits.Length | thicknessIns | | Thickness of insulation |
| Modelica.SIunits.Length | pipeDist | | Equal distance between adjacent pipes |
| Modelica.SIunits.ThermalConductivity | lambdaIns | 0.025 | Heat conductivity of insulation |
| Modelica.SIunits.Length | depth | 1 | Depth of equally burried pipes |
| Modelica.SIunits.CoefficientOfHeatTransfer | h_gs | 14.6 | Heat transfer coefficient at ground sourface |
| Dynamics › Equations |
| Modelica.Fluid.Types.Dynamics | energyDynamics (from LumpedMultiVolumeDeclarations) | Modelica.Fluid.Types.Dynamics.DynamicFreeInitial | Type of energy balance: dynamic (3 initialization options) or steady state |
| Modelica.Fluid.Types.Dynamics | massDynamics (from LumpedMultiVolumeDeclarations) | energyDynamics | Type of mass balance: dynamic (3 initialization options) or steady state |
| Modelica.Fluid.Types.Dynamics | substanceDynamics (from LumpedMultiVolumeDeclarations) | energyDynamics | Type of independent mass fraction balance: dynamic (3 initialization options) or steady state |
| Modelica.Fluid.Types.Dynamics | traceDynamics (from LumpedMultiVolumeDeclarations) | energyDynamics | Type of trace substance balance: dynamic (3 initialization options) or steady state |
| Initialization |
| Modelica.SIunits.AbsolutePressure | p_start (from LumpedMultiVolumeDeclarations) | fill(Medium.p_default, nLev) | Start value of pressure |
| Modelica.SIunits.Temperature | T_start (from LumpedMultiVolumeDeclarations) | fill(Medium.T_default, nLev) | Start value of temperature |
| Medium.MassFraction | X_start (from LumpedMultiVolumeDeclarations) | fill(Medium.X_default, nLev) | Start value of mass fractions m_i/m |
| Medium.ExtraProperty | C_start (from LumpedMultiVolumeDeclarations) | fill(0, nLev, Medium.nC) | Start value of trace substances |
| Medium.ExtraProperty | C_nominal (from LumpedMultiVolumeDeclarations) | fill(1E-2, nLev, Medium.nC) | Nominal value of trace substances. (Set to typical order of magnitude.) |
| Dynamics |
| Real | mSenFac (from LumpedMultiVolumeDeclarations) | 1 | Factor for scaling the sensible thermal mass of the volume |
| Pressure drop |
| dhcSim.DHC.Submodules.TwoPortModules.Pipe.Types.dpTypes | dpType (from BasePipeMulti) | dhcSim.DHC.Submodules.TwoPortModules.Pipe.Types.dpTypes.dp_nominal | Define pressure drop calculation |
| Modelica.SIunits.Length | diameter (from BasePipeMulti) | ones(nLev) | Pipe diameter |
| Modelica.SIunits.PressureDifference | dp_fixed_nominal (from BasePipeMulti) | zeros(nLev) | Additional nominal pressure drop of installations and fitting |
| Modelica.SIunits.Length | length (from BasePipeMulti) | 10 | Length of the pipe |
| Modelica.SIunits.Velocity | v_nominal (from BasePipeMulti) | ones(nLev) | Velocity at m_flow_nominal (used to compute default diameter) |
| Modelica.SIunits.Length | roughness (from BasePipeMulti) | 2.5e-5 | Absolute roughness of pipe, with a default for a smooth steel pipe (dummy if use_roughness = false) |
| Modelica.SIunits.PressureDifference | dp_nominal (from BasePipeMulti) | ones(nLev) | Nominal pressure difference |
| Modelica.SIunits.MassFlowRate | m_flow_nominal (from BasePipeMulti) | ones(nLev) | Nominal mass flow |
| Assumptions |
| Boolean | allowFlowReversal (from BasePipeMulti) | true | = true to allow flow reversal, false restricts to design direction (port_a -> port_b) |
| Advanced |
| Medium.MassFlowRate | m_flow_small (from BasePipeMulti) | 1E-4.*abs(m_flow_nominal) | Small mass flow rate for regularization of zero flow |
| Advanced › Diagnostics |
| Boolean | show_T (from BasePipeMulti) | false | = true, if actual temperature at port is computed |
| Flow resistance |
| Real | ReC (from BasePipeMulti) | 4000 | Reynolds number where transition to turbulent starts |
| Boolean | from_dp (from BasePipeMulti) | false | = true, use m_flow = f(dp) else dp = f(m_flow) |
| Boolean | linearizeFlowResistance (from BasePipeMulti) | false | = true, use linear relation between m_flow and dp for any flow rate |
| Real | deltaM (from BasePipeMulti) | 0.1 | Fraction of nominal flow rate where flow transitions to laminar |
| Heat losses |
| Buildings.HeatTransfer.Data.BaseClasses.ThermalProperties | groundMaterial | | Ground material |
