modelGCritCalc
Model calculating the critical insolation level
Extends from Modelica.Blocks.Icons.Block (Basic graphical layout of input/output block).
Information
This component calculates the solar radiation necessary for the fluid in the collector to gain heat. It is used in the model Buildings.Fluid.SolarCollectors.Controls.CollectorPump.
The critical solar radiation level is calculated using Equation 6.8.2 in Duffie and Beckman (2006). It is
GTC=FRUL (TIn-TEnv) /(FR(τα))
where GTC is the critical solar radiation, FRUL is the heat loss coefficient, TIn is the inlet temperature, TEnv is the ambient temperature, and FR(τα) is the maximum efficiency.
References
J.A. Duffie and W.A. Beckman 2006, Solar Engineering of Thermal Processes (3rd
Edition), John Wiley & Sons, Inc.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.CoefficientOfHeatTransfer | slope | Slope from ratings data | |
| Real | y_intercept | y_intercept from ratings data |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Interfaces.RealInput | TIn | Temperature of water entering the collector | |
| Modelica.Blocks.Interfaces.RealOutput | G_TC | Critical radiation level | |
| Modelica.Blocks.Interfaces.RealInput | TEnv | Ambient temperature at the collector |
Revisions
-
February 15, 2024, by Jelger Jansen:
Refactor model.
This is for Buildings, #3604. -
February 15, 2013 by Peter Grant
First implementation