modelMartin
The Martin approach for plate heat exchangers from VDI Heat Atlas
Extends from BaseClasses.PartialSinglePhaseCorrelation (Base class for single phase heat transfer correlations).
Information
The model Martin extends the partial model PartialSinglePhaseCorrelation and computes the heat transfer coefficient based on the correlation for plate heat exchangers developed by Martin 2010
- inbook(Martin2010)
- Martin, H.
- VDI Heat Atlas
- Stephan, P. (ed.)
- Chapter N6 Pressure Drop and Heat Transfer in Plate Heat Exchangers
- Springer, 2010, pp. 1515-1522
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.SIunits.Length | s_w | 0.00075 | Wall thickness |
| Modelica.SIunits.ThermalConductivity | lambda_w | 15 | Conductivity of the wall |
| Modelica.SIunits.Length | a_hat | 0.002 | Corrugation amplitude |
| Modelica.SIunits.Angle | phi | 45*Modelica.Constants.pi/180 | Corrugation angle |
| Modelica.SIunits.Length | Lambda | 0.0126 | Corrugation wavelength |
| Modelica.SIunits.Length | B_p | 0.1 | Plate width |
| Modelica.SIunits.Length | L_p | 0.2 | Plate length |
| Modelica.SIunits.ReynoldsNumber | Re_turb | 2000.00 | Flow transition Re |
| Modelica.SIunits.ReynoldsNumber | Re_tran | 100.00 | Flow transition range |
| Real | c_q | 0.122 | Empirical constant |
| Real | q | 0.374 | Empirical constant |
| Real | B_0 | 64.00 | Shape factor |
| Real | B_1 | 597.0 | Empirical pressure drop factor B_1 |
| Real | C_1 | 3.850 | Empirical pressure drop factor C_1 |
| Real | K_1 | 39.00 | Empirical pressure drop factor K_1 |
| Real | n | 0.289 | Empirical pressure drop factor n |
| Real | a | 3.800 | Empirical pressure drop factor a |
| Real | b | 0.180 | Empirical pressure drop factor b |
| Real | c | 0.360 | Empirical pressure drop factor c |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Medium.ThermodynamicState | state (from PartialSinglePhaseCorrelation) | Thermodynamic state | |
| Modelica.SIunits.MassFlowRate | m_dot (from PartialSinglePhaseCorrelation) | Inlet massflow | |
| Modelica.SIunits.HeatFlux | q_dot (from PartialSinglePhaseCorrelation) | Heat flow rate per area [W/m2] | |
| Modelica.SIunits.CoefficientOfHeatTransfer | U (from PartialSinglePhaseCorrelation) | ||
| Real | X | Wave number | |
| Real | Phi | Enhancement factor | |
| Modelica.SIunits.Length | d_h | Hydraulic diameter | |
| Modelica.SIunits.ReynoldsNumber | Re | ||
| Modelica.SIunits.PrandtlNumber | Pr | ||
| Modelica.SIunits.NusseltNumber | Nu | ||
| Real | Hg | Hagen number | |
| Real | xi | Friction factor | |
| Real | xi_0 | ||
| Real | xi_0_lam | ||
| Real | xi_0_tur | Friction factor, 0 deg | |
| Real | xi_1 | ||
| Real | xi_1_lam | ||
| Real | xi_1_tur | Friction factor, 90 deg | |
| Real | lamTurb | Laminar or turbulent flow | |
| Modelica.SIunits.Velocity | w | Fluid velocity | |
| Modelica.SIunits.Area | A_0 | Plate projection | |
| Modelica.SIunits.Area | A_p | Plate surface | |
| Medium.Density | rho | ||
| Medium.Temperature | T | ||
| Medium.DynamicViscosity | eta | ||
| Medium.DynamicViscosity | eta_f_w | Viscosity of fluid at wall temperature | |
| Medium.ThermalConductivity | lambda | ||
| Medium.AbsolutePressure | delta_p | ||
| Modelica.SIunits.VolumeFlowRate | V_dot | Volume flow | |
| Modelica.SIunits.CoefficientOfHeatTransfer | alpha | ||
| Real | part1 | ||
| Real | part2 |