.IDEAS.Fluid.PVTCollectors.Validation.PVT_UI.PVTQuasiDynamicCollectorValidation

Information

Validation model of a photovoltaic–thermal (PVT) collector using the ISO 9806:2013 quasi-dynamic thermal method with integrated electrical coupling. Discretizes the collector into segments, computes heat loss and gain per ISO 9806, and calculates electrical output via the PVWatts-based submodel, relying solely on datasheet parameters.

Extends

• IDEAS.Fluid.SolarCollectors.BaseClasses.PartialSolarCollector

Submodel References

• Electrical generation: IDEAS.Fluid.PVTCollectors.BaseClasses.ElectricalPVT
• Quasi-dynamic thermal losses: IDEAS.Fluid.PVTCollectors.BaseClasses.ISO9806QuasiDynamicHeatLoss
• Solar (thermal) heat gain: see IDEAS.Fluid.SolarCollectors.BaseClasses.EN12975SolarGain
• Long-wave radiation (derived due to faulty measurements): IDEAS.Fluid.PVTCollectors.Validation.PVT_UI.BaseClasses.LongWaveRadiation

Implementation Notes

This model is designed for (unglazed) PVT collectors and discretizes the flow path into nSeg segments to capture temperature gradients. It is compatible with dynamic simulations in which irradiance, ambient and fluid temperatures, and wind speed vary over time. Because direct measurements of long-wave sky irradiance were found to be faulty, the model instead computes long-wave radiation using the dedicated LongWaveRadiation model.

References

• Dobos, A. P. (2014). PVWatts Version 5 Manual. NREL/TP-6A20-62641
• ISO 9806:2013. Solar thermal collectors — Test methods. ISO.
• Meertens, L., Jansen, J., Helsen, L. (2025). Development and Experimental Validation of an Unglazed Photovoltaic-Thermal Collector Modelica Model that only needs Datasheet Parameters, submitted to the 16th International Modelica & FMI Conference, Lucerne, Switzerland, Sep 8–10, 2025.

Revisions

• July 7, 2025, by Lone Meertens:
  First implementation PVT model. This is for #1436.