modelGroeneveld2006LUT
Extends from Modelica.Blocks.Interfaces.SO (Single Output continuous control block).
Information
Prediction of the critical heat flux using the 2006 Groeneveld Look-Up Table as presented in 2006 CHF Look-Up Table, Nuclear Engineering and Design 237, pp. 190-1922.
Correction Factor Definitions
K1 "Diameter Effect Factor"
K2 "Bundle Geometry Factor"
K3 "Mid-Plane Spacer Factor"
K4 "Heated Length Factor"
K5 "Axial Flux Distribution Factor"
K6 "Radial/Circumferential (R/C) Flux Distribution Factor"
K7 "Flow-Orientation Factor"
K8 "Vertical Low-Flow Factor - A minus sign refers to downward flow"
Note: If K(3) is used then K(4) = 1. This is because K(3) already includes the heated length effect. This condition is handled in the code.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Boolean | use_Ks | fill(false, 8) | =true to turn on correction factor. See info tab for details |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| RealOutput | y (from SO) | Connector of Real output signal | |
| Modelica.Blocks.Interfaces.RealInput | P | Pressure. Used in table interpolation | |
| Modelica.Blocks.Interfaces.RealInput | x_th | Thermodynamic quality. Used in table interpolation and in calculation of x_abs for K = 2,4,5,6,7,8 | |
| Modelica.Blocks.Interfaces.RealInput | G | Mass flux. Used in table interpolation and K = 3,7,8 |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| SI.Length | D_hyd | 1.0 | Hydraulic diameter of subchannel. Used in K = 1,3,4,7 |
| SI.Length | D_htr | 1.0 | Heater element diameter. Used in K = 2 |
| SI.Length | Pitch | 1.0 | Center distance between heating elements. Used in K = 2 |
| SIadd.NonDim | K_g | 1.0 | Pressure loss coefficient of spacer. Used in K = 3 |
| SI.Length | L_sp | 1.0 | Distance between mid-plane of spacers. Used in K = 3 |
| SI.Length | L_htd | 1.0 | Heated length. Used in K = 4 |
| SI.Density | rho_lsat | 1.0 | Fluid saturation density. Used in K = 4,7,8 |
| SI.Density | rho_vsat | 1.0 | Vapor saturation density. Used in K = 4,7,8 |
| SI.HeatFlux | q_BLA | 1.0 | Boiling length average heat flux. Used in K = 5 |
| SI.HeatFlux | q_local | 1.0 | Local heat flux. Used in K = 5 |
| SI.HeatFlux | q_rc_avg | 1.0 | Average R/C flux at a height z. Used in K = 6 |
| SI.HeatFlux | q_rc_max | 1.0 | Maximum R/C flux at a height z. Used in K = 6 |
| SIadd.NonDim | f_L | 1.0 | Friction factor of the channel. Used in K = 7 |
| SI.Acceleration | g_n | Modelica.Constants.g_n | Gravity coefficient. Used in K = 7 |
| SIadd.NonDim | x_abs | noEvent(max(0.0, min(1.0, x_th))) | Absolute quality. Used in table interpolation and K = 2,4,5,6,7,8 |
| SDF.NDTable | q | Outputs predicted CHF heat flux [W/m2] | |
| Real | Ks | Correction factors | |
| Modelica.Blocks.Math.Abs | absG |