modelConstant
Constant: Constant heat transfer coefficient
Extends from Greenhouses.Flows.FluidFlow.HeatTransfer.BaseClasses.PartialSinglePhaseCorrelation (Base class for single-phase heat transfer correlations), Greenhouses.Flows.FluidFlow.HeatTransfer.BaseClasses.PartialPipeCorrelation (Base class for heat transfer correlations for pipe flow), Greenhouses.Flows.FluidFlow.HeatTransfer.BaseClasses.PartialPlateHeatExchangerCorrelation (Base class for heat transfer correlations for plate heat exchangers).
Information
The model Constant extends the partial model PartialSinglePhaseCorrelation and defines a constant heat transfer coefficient.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.CoefficientOfHeatTransfer | U_c | 1000 | Heat transfer coefficient |
| Geometry | |||
| Modelica.Units.SI.Length | d_h (from PartialPipeCorrelation) | Hydraulic diameter | |
| Modelica.Units.SI.Length | a_hat (from PartialPlateHeatExchangerCorrelation) | 0.002 | Corrugation amplitude |
| Modelica.Units.SI.Angle | phi (from PartialPlateHeatExchangerCorrelation) | Modelica.Units.Conversions.from_deg(45) | Corrugation angle |
| Modelica.Units.SI.Length | Lambda (from PartialPlateHeatExchangerCorrelation) | 0.0126 | Corrugation wavelength |
| Modelica.Units.SI.Length | B_p (from PartialPlateHeatExchangerCorrelation) | 0.1 | Plate flow width |
| Advanced geometry | |||
| Modelica.Units.SI.Area | A_cro (from PartialPipeCorrelation) | Modelica.Constants.pi*d_h^2/4 | Cross-sectional area |
| Real | X (from PartialPlateHeatExchangerCorrelation) | 2*Modelica.Constants.pi*a_hat/Lambda | Wave number |
| Real | Phi (from PartialPlateHeatExchangerCorrelation) | 1/6*(1 + sqrt(1 + X^2) + 4*sqrt(1 + X^2/2)) | Enhancement factor |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.MassFlowRate | m_dot (from PartialHeatTransferCorrelation) | Inlet massflow | |
| Modelica.Units.SI.HeatFlux | q_dot (from PartialHeatTransferCorrelation) | Heat flow rate per area [W/m2] | |
| Modelica.Units.SI.CoefficientOfHeatTransfer | U (from PartialHeatTransferCorrelation) | ||
| Medium.ThermodynamicState | state (from PartialSinglePhaseCorrelation) | Thermodynamic state | |
| Modelica.Units.SI.CoefficientOfHeatTransfer | alpha (from PartialPlateHeatExchangerCorrelation) | The calculated HTC |