modelFlowDependentHeatTransferCoefficient2ph
Separate h.t.c.'s for each phase, each changing as (w/w_nom)^alpha
Extends from BaseClasses.DistributedHeatTransferFV (Base class for distributed heat transfer models - finite volumes).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Boolean | useAverageTemperature (from DistributedHeatTransferFV) | true | = true to use average temperature for heat transfer |
| SI.Length | l (from DistributedHeatTransferFV) | L/(Nw) | Length of a single volume |
| Modelica.SIunits.PerUnit | kc (from DistributedHeatTransferFV) | 1 | Correction factor for heat transfer |
| SI.MassFlowRate | wnom_ht | wnom | Nominal flow rate for heat transfer correlation (single tube) |
| SI.CoefficientOfHeatTransfer | gamma_nom_liq | Nominal heat transfer coefficient, liquid phase | |
| SI.CoefficientOfHeatTransfer | gamma_nom_2ph | Nominal average heat transfer coefficient, 2-phase | |
| SI.CoefficientOfHeatTransfer | gamma_nom_vap | Nominal heat transfer coefficient, vapour phase | |
| SI.PerUnit | alpha | 0.8 | Exponent in the flow-dependency law |
| SI.PerUnit | beta | 0.1 | Fraction of nominal flow rate below which the heat transfer is not reduced |
| Set by Flow1D model | |||
| Integer | Nf (from DistributedHeatTransferFV) | 2 | Number of nodes on the fluid side |
| Integer | Nw (from DistributedHeatTransferFV) | Nf - 1 | Number of volumes on the wall side |
| Integer | Nt (from DistributedHeatTransferFV) | Number of tubes in parallel | |
| SI.Distance | L (from DistributedHeatTransferFV) | Tube length | |
| SI.Area | A (from DistributedHeatTransferFV) | Cross-sectional area (single tube) | |
| SI.Length | omega (from DistributedHeatTransferFV) | Wet perimeter of heat transfer surface (single tube) | |
| SI.Length | Dhyd (from DistributedHeatTransferFV) | Hydraulic Diameter (single tube) | |
| SI.MassFlowRate | wnom (from DistributedHeatTransferFV) | Nominal mass flow rate (single tube) | |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| ThermoPower.Thermal.DHTVolumes | wall (from DistributedHeatTransferFV) |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Medium.ThermodynamicState[Nf] | fluidState (from DistributedHeatTransferFV) | ||
| Medium.MassFlowRate[Nf] | w (from DistributedHeatTransferFV) | ||
| Medium.Temperature[Nf] | T (from DistributedHeatTransferFV) | Temperatures at the fluid side nodes | |
| Medium.Temperature[Nw] | Tw (from DistributedHeatTransferFV) | Temperatures of the wall volumes | |
| SI.Power[Nw] | Qw (from DistributedHeatTransferFV) | Heat flows entering from the wall volumes | |
| SI.Power[Nf - 1] | Qvol (from DistributedHeatTransferFV) | Qw | Heat flows going to the fluid volumes |
| SI.Power | Q (from DistributedHeatTransferFV) | Total heat flow through lateral boundary | |
| SI.CoefficientOfHeatTransfer | gamma_liq | Actual heat transfer coefficient, liquid phase | |
| SI.CoefficientOfHeatTransfer | gamma_2ph | Actual heat transfer coefficient, 2-phase | |
| SI.CoefficientOfHeatTransfer | gamma_vap | Actual heat transfer coefficient, vapour phase | |
| SI.PerUnit | w_wnom | Ratio between actual and nominal flow rate | |
| SI.PerUnit | w_wnom_reg | Regularized w/wnom ratio | |
| Real[Nw] | state | Indicator of phase configuration | |
| SI.PerUnit[Nw] | alpha_l | Normalized position of liquid phase boundary | |
| SI.PerUnit[Nw] | alpha_v | Normalized position of vapour phase boundary | |
| Medium.SpecificEnthalpy[Nf] | h | Fluid specific enthalpy | |
| Medium.SpecificEnthalpy | hl | Saturated liquid enthalpy | |
| Medium.SpecificEnthalpy | hv | Saturated vapour enthalpy | |
| Medium.Temperature[Nw] | Tvol | Fluid average temperature in the volumes | |
| Medium.Temperature | Ts | Saturated water temperature | |
| Medium.SaturationProperties | sat | Properties of saturated fluid | |
| Medium.AbsolutePressure | p | Fluid pressure for property calculations |