modelFlowDependentThermalConductance
Flow-dependent global thermal conductance UA = UAnom*(w/wnom)^alpha
Extends from FlowDependentHeatTransferCoefficient (Flow-dependent h.t.c. gamma = gamma_nom*(w/wnom)^alpha).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| SI.Length | l (from DistributedHeatTransferFEM) | L/(Nw) | Length of a single volume |
| SI.CoefficientOfHeatTransfer | gamma_nom (from FlowDependentHeatTransferCoefficient) | Nominal heat transfer coefficient | |
| SI.PerUnit | alpha (from FlowDependentHeatTransferCoefficient) | Exponent in the flow-dependency law | |
| SI.PerUnit | beta (from FlowDependentHeatTransferCoefficient) | 0.1 | Fraction of nominal flow rate below which the heat transfer is not reduced |
| SI.MassFlowRate | wnom_ht (from FlowDependentHeatTransferCoefficient) | wnom | Nominal flow rate for heat transfer correlation (single tube) |
| SI.ThermalConductance | UAnom | Nominal global thermal conductance (UA value), for Nt tubes | |
| Set by Flow1D model | |||
| Integer | Nf (from DistributedHeatTransferFEM) | 2 | Number of nodes on the fluid side |
| Integer | Nw (from DistributedHeatTransferFEM) | Nf | Number of nodes on the wall side |
| Integer | Nt (from DistributedHeatTransferFEM) | Number of tubes in parallel | |
| SI.Distance | L (from DistributedHeatTransferFEM) | Tube length | |
| SI.Area | A (from DistributedHeatTransferFEM) | Cross-sectional area (single tube) | |
| SI.Length | omega (from DistributedHeatTransferFEM) | Wet perimeter of heat transfer surface (single tube) | |
| SI.Length | Dhyd (from DistributedHeatTransferFEM) | Hydraulic Diameter (single tube) | |
| SI.MassFlowRate | wnom (from DistributedHeatTransferFEM) | Nominal mass flow rate (single tube) | |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| ThermoPower.Thermal.DHTNodes | wall (from DistributedHeatTransferFEM) |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Medium.ThermodynamicState[Nf] | fluidState (from DistributedHeatTransferFEM) | ||
| Medium.MassFlowRate[Nf] | w (from DistributedHeatTransferFEM) | ||
| Medium.Temperature[Nf] | T (from DistributedHeatTransferFEM) | Temperatures at the fluid side nodes | |
| Medium.Temperature[Nw] | Tw (from DistributedHeatTransferFEM) | Temperatures of the wall volumes | |
| SI.HeatFlux[Nw] | phi_w (from DistributedHeatTransferFEM) | Heat fluxes entering from the wall connector | |
| SI.HeatFlux[Nf] | phi_f (from DistributedHeatTransferFEM) | phi_w | Heat fluxes going to the fluid nodes |
| SI.CoefficientOfHeatTransfer | gamma (from FlowDependentHeatTransferCoefficient) | Actual heat transfer coefficient | |
| SI.PerUnit | w_wnom (from FlowDependentHeatTransferCoefficient) | Ratio between actual and nominal flow rate | |
| SI.PerUnit | w_wnom_reg (from FlowDependentHeatTransferCoefficient) | Regularized ratio between actual and nominal flow rate | |
| SI.ThermalConductance | UA | gamma*omega*L*Nt |