modelAir2AirSimplifiedHeatEx
Extends from BuildSysPro.BaseClasses.HeatTransfer.Interfaces.Element1D (Partial heat transfer element with two HeatPort connectors that does not store energy).
Information
Simplified model of an exchanger in pure thermal modelling considering exchanger efficiency and a ventilation rate
Hypothesis and equations
The value of the volume flow can be controlled or fixed throughout the simulation as well as the exchanger efficiency.
Note: modification of a former exchanger model whose rate was given in vol/h instead of m3/h like in this model.
Bibliography
none
Instructions for use
The port_a is to be connected to the outdoor temperature and the port_b to inside.
Known limits / Use precautions
none
Validations
Validated model - Lou Chesne 10/2011, Aurélie Kaemmerlen 10/2012
--------------------------------------------------------------
Licensed by EDF under a 3-clause BSD-license
Copyright © EDF 2009 - 2023
BuildSysPro version 3.6.0
Author : Lou CHESNE, Aurélie KAEMMERLEN, EDF (2011)
--------------------------------------------------------------
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Control | |||
| Boolean | use_Qv_in | false | Volume flow controlled |
| Boolean | use_Efficacite_in | false | Efficiency controlled |
| Real | Qv | 0 | Constant ventilation rate [m3/h] |
| Real | Efficacite | 0.5 | Constant exchanger efficiency [0-1] |
| Air properties | |||
| Modelica.Units.SI.Density | rho | 1.24 | Air density |
| Modelica.Units.SI.SpecificHeatCapacity | Cp | 1005 | Specific heat capacity of air |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| HeatPort_a | port_a (from Element1D) | ||
| HeatPort_b | port_b (from Element1D) | ||
| Modelica.Blocks.Interfaces.RealInput | Qv_in | Scenario of controlled ventilation rate [m3/h] | |
| Modelica.Blocks.Interfaces.RealInput | Efficacite_in | Scenario of double flow efficiency [0-1] |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.HeatFlowRate | Q_flow (from Element1D) | Heat flow rate from port_a -> port_b | |
| Modelica.Units.SI.TemperatureDifference | dT (from Element1D) | port_a.T - port_b.T | |
| Modelica.Units.SI.Temperature | Tentree | Inlet temperature of the exchanger |