modelRadiantHeatingFloor
Information
Hypothesis and equations
From a wall model with n homogeneous layers in pure thermal (1D spatial discretization of the heat equation), this model integrates an intermediate node capable of providing a thermal heat flow depending on temperature and water flow in the case of a water floor, or depending on electric power in the case of an electric radiant floor.
This model was integrated into the wall model of the library that should be used for connexions with indoor and outdoor air nodes to a thermal area.
Bibliography
none
Instructions for use
This model is to be used as elementary building block for a discretization of an active wall surface, such as a heating floor (default setting).
Surface nodes allow to connect directly incident flows on the surface (eg. Solar fluxes).
External nodes allow to connect temperatures of the environment, however by adding convective exchanges.
Known limits / Use precautions
none
Validations
Validated model - Hubert Blervaque 06/2012
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Licensed by EDF under a 3-clause BSD-license
Copyright © EDF 2009 - 2023
BuildSysPro version 3.6.0
Author : Hubert BLERVAQUE, EDF (2012)
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Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | TypeChauffage | 1 | Heating floor type |
| Modelica.Units.SI.Area | S | 1 | Wall surface |
| Modelica.Units.SI.Temperature | Tp | 293.15 | Initial wall temoerature |
| BuildSysPro.Utilities.Types.InitCond | InitType | BuildSysPro.Utilities.Types.InitCond.SteadyState | |
| Integer | nP | 1 | Number of the layer whose upper boundary is the site of power injection - must be between 2 layers!!! |
| Modelica.Units.SI.Distance | Ltube | 100 | Floor heating coil length |
| Modelica.Units.SI.Distance | DiametreInt | 0.013 | Inside diameter of the tube |
| Modelica.Units.SI.Distance | eT | 0.0015 | Tube thickness |
| Modelica.Units.SI.ThermalConductivity | lambdaT | 0.35 | Thermal conductivity of the tube |
| Wall type | |||
| BuildSysPro.Utilities.Data.WallData.RecentFloor | caracParoi | Wall characteristics | |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| BuildSysPro.BaseClasses.HeatTransfer.Interfaces.HeatPort_a | Ts_a | Surface temperature | |
| BuildSysPro.BaseClasses.HeatTransfer.Interfaces.HeatPort_b | Ts_b | Surface temperature | |
| Modelica.Blocks.Interfaces.RealInput | PelecIn | Electric power injected into the floor | |
| Modelica.Blocks.Interfaces.RealInput[2] | WaterIn | Vector containing 1- the inlet fluid temperature (K), 2- the inlet fluid flow rate (kg/s) | |
| Modelica.Blocks.Interfaces.RealOutput[2] | WaterOut | Vector containing 1- the outlet fluid temperature (K), 2- the outlet fluid flow rate (kg/s) |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| BuildSysPro.BaseClasses.HeatTransfer.Components.HomogeneousNLayersWall | ParoiNCouchesHomogenesA | ||
| BuildSysPro.BaseClasses.HeatTransfer.Components.HomogeneousNLayersWall | ParoiNCouchesHomogenesB | ||
| BuildSysPro.BaseClasses.HeatTransfer.Sources.PrescribedHeatFlow | prescribedPelec | ||
| BuildSysPro.BaseClasses.HeatTransfer.Components.HeatCapacitor | Eau | ||
| BuildSysPro.BaseClasses.HeatTransfer.Sensors.TemperatureSensor | temperatureSensor | ||
| Modelica.Blocks.Sources.RealExpression | realExpression | ||
| BuildSysPro.BaseClasses.HeatTransfer.Sources.PrescribedHeatFlow | prescribedHeatFlow1 | ||
| BuildSysPro.BaseClasses.HeatTransfer.Components.ThermalConductor | thermalConductor |
Revisions
Gilles Plessis 06/2012 : Modification du paramétrage du modèle pour ne rentrer qu'une composition de paroi (au lieu de n, m, mat et e) et une position de la couche chauffante & suppression de la convection : utiliser le modèle de Paroi intégrant ce choix de paroi active.
Aurélie Kaemmerlen 07/2012 : Fusion des modèles de paroi active à eau et de plancher électrique
Sila Filfli 07/2012 : Correction de la formule donnant la surface des tuyaux (surfaceT)