modelCondensingBoilerEfficiency
Model for temperature depending efficiency of a condensing boiler
Information
This model calculates the efficiency of a condensing boiler and is based upon the literature Règles de modélisation des systèmes énergétiques dans les bâtiments basse consommation
The efficiency depends on the inflow temperature of the boiler (T_in).
-
September 19, 2019 by Alexander Kümpel:
First implementation
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | lambda | 0.01 | Offset variable of weighting coefficients sigmas |
| Modelica.Units.SI.Temperature | T_nom | 343.15 | Nominal temperature |
| Modelica.Units.SI.Temperature | T_part | 308.15 | Intermediate temperature |
| Modelica.Units.SI.Efficiency | eta_nom | 1 | Nominal net heating value efficiency |
| Modelica.Units.SI.Efficiency | eta_int | 1 | Intermediate net heating value efficiency |
| Real | eta_max | 1.11 | Ratio gross (high) heating value / net (low) heating value defined according to the fuel |
| Real | ak | -0.0002 | Sensible temperature depending efficiency decrease per K |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Interfaces.RealInput | T_in | Ambient air temperature | |
| Modelica.Blocks.Interfaces.RealOutput | eta | Value of Real output |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Real | etaSens | ||
| Real | etaCond | ||
| Real | sigmaSens | ||
| Real | sigmaCond | ||
| Real | etaRP | ||
| Modelica.Units.SI.Temperature | Tc | Temperature of Sensitive and Latent characteristic intersection |