modelISO9806HeatLoss
Example showing the use of ISO9806HeatLoss
Extends from Modelica.Icons.Example.
Information
This example demonstrates the implementation of IDEAS.Fluid.PVTCollectors.BaseClasses.ISO9806QuasiDynamicHeatLoss, which calculates the quasi-dynamic heat loss of a PVT or solar thermal collector according to the ISO 9806:2017 standard.
In addition to showcasing the ISO 9806:2017-based model, this example also compares its behavior to the steady-state heat loss model IDEAS.Fluid.SolarCollectors.BaseClasses.EN12975HeatLoss, which is based on the now-superseded EN 12975 standard.
This comparison highlights the differences between the steady-state and quasi-dynamic approaches, particularly in how they account for environmental factors such as wind speed and long-wave irradiance.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| IDEAS.Fluid.PVTCollectors.Data.Generic | per | IDEAS.Fluid.PVTCollectors.Data.Uncovered.UI_Validation() | Performance data |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Sources.Sine | T1 | Temperature of the first segment | |
| Modelica.Blocks.Sources.Sine | T2 | Temperature of the second segment | |
| Modelica.Blocks.Sources.Sine | T3 | Temperature of the third segment | |
| IDEAS.Fluid.PVTCollectors.BaseClasses.ISO9806HeatLoss | heaLosQuaDyn | ||
| IDEAS.Fluid.SolarCollectors.BaseClasses.EN12975HeatLoss | heaLosSteSta | ||
| Modelica.Blocks.Sources.Sine | TEnv | Temperature of the surrounding environment | |
| Modelica.Blocks.Sources.Sine | winSpePla | wind speed in the collector plane | |
| Modelica.Blocks.Sources.RealExpression | HHorIR | long wave irradiance | |
| Modelica.Blocks.Sources.RealExpression | HGloTil | Global irradiance on the tilted surface | |
| Modelica.Blocks.Interfaces.RealOutput[3] | QLos_flow_QuaDyn | Heat loss rate at current conditions | |
| Modelica.Blocks.Interfaces.RealOutput[3] | QLos_flow_SteSta | Heat loss rate at current conditions |
Contents
| Name | Description |
|---|---|
| Medium | Medium in the system |
Revisions
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July 2, 2025, by Lone Meertens:
First implementation of ISO 9806 quasi-dynamic heat loss example. This is for 1436.