modelTwoPhaseCavity
TwoPhaseCavity for one shell pass
Extends from ThermoSysPro.Fluid.Interfaces.PropertyInterfaces.WaterSteamFluidTypeParameterInterface (Interface to display the water/steam fluid type after parametrization), ThermoSysPro.Fluid.Interfaces.IconColors (Colors of the static, singular and dynamic model icons).
Information
## Copyright © EDF 2002 - 2026 ## ThermoSysPro Version 4.2 This component model is documented in Sect. 14.4 of the ThermoSysPro book.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Boolean | Vertical | true | true: vertical cylinder - false: horizontal cylinder |
| Units.SI.Radius | R | 1.05 | Radius of the Cavity cross-sectional area |
| Units.SI.Length | Lc | 2.5 | Support plate spacing in cooling zone(chicanes) |
| Units.SI.Volume | V | 50 | Cavity volume (= total volume + bleeding volume - pipe volume) |
| Units.SI.Volume | Vmin | 1.e-6 | |
| Integer | Ns | 10 | Number of segments for one tube pass |
| Integer | NbTub1 | 500 | Numbers of drowned pipes in liquid; Pipe 1 (Hoizontal, Vertical Separate) |
| Integer | NbTub2 | 500 | Number of total pipes immersed in steam = NbTub2; Pipe 2 |
| Integer | NbTub3 | 2000 | Number of total pipes immersed in steam ; Pipe 3 |
| Integer | NbTubV | 15 | Numbers of pipes in a vertical row (tube bank) |
| Units.SI.Length | L1 | 10 | Length of drowned pipes in liquid (pipes 1) |
| Units.SI.Length | L2 | 10 | Length of Pipe 2 (in steam) |
| Units.SI.Length | L3 | 20 | Length of Pipe 3 (in steam) |
| Units.SI.Diameter | Dext | 0.02 | External pipe diameter |
| Units.SI.Diameter | DIc | 1.40 | Internal calendre diameter |
| Units.SI.Length | PasL | 0.025 | Longitudinal step or length bottom pipes triangular step |
| Units.SI.Length | PasT | 0.023 | Transverse step or pipes step |
| ThermoSysPro.Units.nonSI.Angle_deg | Angle | 60 | Average bend angle (deg) |
| Real | Ccond | 0.01 | Condensation coefficient |
| Real | Cevap | 0.09 | Evaporation coefficient |
| Real | Xlo | 0.0025 | Vapor mass fraction in the liquid phase from which the liquid starts to evaporate |
| Real | Xvo | 0.9975 | Vapor mass fraction in the gas phase from which the liquid starts to condensate |
| Real | COPl | 1 | Corrective terme for the heat exchange coefficient or the fouling coefficient of the liquid side |
| Real | COPv | 1 | Corrective terme for heat exchange coefficient or the fouling coefficient of the steam side |
| Boolean | Cal_hconv | true | false: heat transfer coefficient liquid and steam given by parameter COPl and COPv- true: calculated using the Nusselt correlation |
| Units.SI.CoefficientOfHeatTransfer | hliq | 1.5e3 | Heat transfer coefficient between the liquid and the cooling pipes |
| Units.SI.CoefficientOfHeatTransfer | hcond | 8e3 | Heat transfer coefficient between the vapor and the cooling pipes |
| Units.SI.CoefficientOfHeatTransfer | Kvl | 1000 | Heat exchange coefficient between the liquid and gas phases |
| Units.SI.CoefficientOfHeatTransfer | Klp | 850 | Heat exchange coefficient between the liquid phase and the wall |
| Units.SI.CoefficientOfHeatTransfer | Kvp | 450 | Heat exchange coefficient between the gas phase and the wall |
| Units.SI.CoefficientOfHeatTransfer | Kpa | 0.5 | Heat exchange coefficient between the wall and the outside ambiant |
| Units.SI.Temperature | Ta | 310 | External temperature |
| Units.SI.Mass | Mp | 100e3 | Wall mass |
| Units.SI.SpecificHeatCapacity | cpp | 600 | Wall specific heat |
| Boolean | step_square | true | true: aligned pipes - false: staggered pipes (triangular step) |
| Boolean | dynamic_energy_balance | true | true: dynamic energy balance equation - false: static energy balance equation |
| Boolean | steady_state | true | true: start from steady state - false: start from (P0, Vf0) (active if dynamic_energy_balance=true) |
| Real | Vf0 | 0.5 | Fraction of initial water volume in the drum (active if dynamic_energy_balance=true and steady_state=false) |
| Units.SI.AbsolutePressure | P0 | 1.e5 | Fluid initial pressure (active if dynamic_energy_balance=true and steady_state=false) |
| Boolean | continuous_flow_reversal | false | true: continuous flow reversal - false: discontinuous flow reversal |
| Boolean | diffusion | false | true: energy balance equation with diffusion - false: energy balance equation without diffusion |
| Fluid › Fluid properties | |||
| WaterSteamFluidType | wsftype (from WaterSteamFluidTypeParameterInterface) | WaterSteamFluidType.WaterSteam | Water/steam fluid type |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Interfaces.Connectors.FluidInlet | Cv | Steam input | |
| Interfaces.Connectors.FluidOutlet | Cl | Water output | |
| ThermoSysPro.Thermal.Connectors.ThermalPort[Ns3] | Cth3 | ||
| ThermoSysPro.InstrumentationAndControl.Connectors.OutputReal | yLevel | Water level | |
| Interfaces.Connectors.FluidInlet | Ce | Water input | |
| ThermoSysPro.Thermal.Connectors.ThermalPort[Ns] | Cth1 | ||
| ThermoSysPro.Thermal.Connectors.ThermalPort[Ns] | Cth2 |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Units.SI.Length | L | Cavity length | |
| Integer | NbTubT | Number of total pipes in Cavity | |
| Units.SI.Pressure | P | Fluid average pressure | |
| Units.SI.Pressure | Pfond | Fluid pressure at the bottom of the cavity | |
| Units.SI.SpecificEnthalpy | hl | Liquid phase specific enthalpy | |
| Units.SI.SpecificEnthalpy | hv | Gas phase specific enthalpy | |
| Units.SI.Temperature | Tl | Liquid phase temperature | |
| Units.SI.Temperature | Tv | Gas phase temperature | |
| Units.SI.Volume | Vl | Liquid phase volume | |
| Units.SI.Volume | Vv | Gas phase volume | |
| Real | xl | Mass vapor fraction in the liquid phase | |
| Real | xv | Mass vapor fraction in the gas phase | |
| Units.SI.Density | rhol | Liquid phase density | |
| Units.SI.Density | rhov | Gas phase density | |
| Units.SI.MassFlowRate | BQl | Right hand side of the mass balance equation of the liquid phase | |
| Units.SI.MassFlowRate | BQv | Right hand side of the mass balance equation of the gas phaser | |
| Units.SI.Power | BHl | Right hand side of the energy balance equation of the liquid phase | |
| Units.SI.Power | BHv | Right hand side of the energy balance equation of the gas phase | |
| Units.SI.MassFlowRate | Qcond | Condensation mass flow rate from the vapor phase | |
| Units.SI.MassFlowRate | Qevap | Evaporation mass flow rate from the liquid phase | |
| Real | QS | Surface mass flow rate of Water (kg/m2s) | |
| Units.SI.Power[Ns] | dW1 | Power exchange between the wall and the fluid in each section side 1 | |
| Units.SI.Power[Ns] | dW2 | Power exchange between the wall and the fluid in each section side 2 | |
| Units.SI.Power[Ns3] | dW3 | Power exchange between the wall and the fluid in each section side 3 | |
| Units.SI.Power | W1t | Total power exchanged on the steam side 1 | |
| Units.SI.Power | W2t | Total power exchanged on the water side 2 | |
| Units.SI.Power | W3t | Total power exchanged on the water side 3 | |
| Units.SI.Power | W4t | Total power exchanged on the steam side 4 | |
| Units.SI.Power | Wvl | Thermal power exchanged from the gas phase to the liquid phase | |
| Units.SI.Power | Wpl | Thermal power exchanged from the liquid phase to the wall | |
| Units.SI.Power | Wpv | Thermal power exchanged from the gas phase to the wall | |
| Units.SI.Power | Wpa | Thermal power losses to ambiant | |
| Units.SI.Temperature[Ns] | Tp1 | Wall temperature in section i of side 1 | |
| Units.SI.Temperature[Ns] | Tp2 | Wall temperature in section i of side 2 | |
| Units.SI.Temperature[Ns3] | Tp3 | Wall temperature in section i of side 3 | |
| Units.SI.Temperature | Tp | Wall temperature of cavity | |
| Units.SI.Position | zl | Liquid level in Cavity | |
| Units.SI.Area | Al | Cross sectional area of the liquid phase | |
| Units.SI.Angle | theta | Angle | |
| Units.SI.Area | Avl | Heat exchange surface between the liquid and gas phases | |
| Units.SI.Area | Alp | Liquid phase surface on contact with the wall | |
| Units.SI.Area | Avp | Gas phase surface on contact with the wall | |
| Units.SI.Area | Ape | Wall surface on contact with the fluid | |
| Units.SI.Area | Surf_tot | Total heat exchange surface | |
| Units.SI.Area | Surf_ext1 | Heat exchange surface for drowned section ; pipe 1 | |
| Units.SI.Area | Surf_ext2 | Heat exchange surface for section 2 ; pipe 2 | |
| Units.SI.Area | Surf_ext3 | Heat exchange surface for section 3 ; pipe 3 | |
| Units.SI.ReynoldsNumber | Rel | liquid Reynolds number | |
| Real | Prl | liquid Prandtl number in node i | |
| Units.SI.ThermalConductivity | kl | liquid thermal conductivity | |
| Units.SI.DynamicViscosity | mul | liquid dynamic viscosity | |
| Units.SI.DynamicViscosity[Ns] | mult | liquid dynamic viscosity at wall temperature | |
| Units.SI.CoefficientOfHeatTransfer[Ns] | hcond2 | Heat transfer coefficient between the vapor and the cooling pipes zone 2 | |
| Units.SI.CoefficientOfHeatTransfer[Ns3] | hcond3 | Heat transfer coefficient between the vapor and the cooling pipes zone 3 | |
| Units.SI.CoefficientOfHeatTransfer[Ns] | hliqu | Heat transfer coefficient between the liquid and the cooling pipes zone 1 | |
| Units.SI.Diameter | DH | hydraulic diameter | |
| Real[Ns] | EE | ||
| FluidType[4] | fluids | Fluids mixing in volume | |
| Units.SI.Power | Je | Thermal power diffusion from inlet Ce | |
| Units.SI.Power | Jv | Thermal power diffusion from inlet Cv | |
| Units.SI.Power | Jl | Thermal power diffusion from outlet Cl | |
| Units.SI.Power | Jt_l | Total thermal power diffusion for the liquid | |
| Units.SI.Power | Jt_v | Total thermal power diffusion for the vapor | |
| Units.SI.MassFlowRate | gamma_e | Diffusion conductance for inlet Ce | |
| Units.SI.MassFlowRate | gamma_v | Diffusion conductance for inlet Cv | |
| Units.SI.MassFlowRate | gamma_l | Diffusion conductance for outlet Cl | |
| Real | re | Value of r(Q/gamma) for inlet Ce | |
| Real | rv | Value of r(Q/gamma) for inlet Cv | |
| Real | rl | Value of r(Q/gamma) for outlet Cl | |
| ThermoSysPro.Properties.WaterSteam.Common.ThermoProperties_ph | prol | Propri鴩s de l'eau dans le ballon | |
| ThermoSysPro.Properties.WaterSteam.Common.ThermoProperties_ph | prov | Propri鴩s de la vapeur dans le ballon | |
| ThermoSysPro.Properties.WaterSteam.Common.PropThermoSat | lsat | ||
| ThermoSysPro.Properties.WaterSteam.Common.PropThermoSat | vsat | ||
| ThermoSysPro.Properties.WaterSteam.Common.ThermoProperties_ph | prod | ||
| ThermoSysPro.Properties.WaterSteam.Common.ThermoProperties_ph | proe | ||
| ThermoSysPro.Properties.WaterSteam.Common.ThermoProperties_ph | provIn | Propri鴩s de la vapeur dans le ballon |
Revisions
Authors Baligh El Hefni Daniel Bouskela