packageElectrical

Electrical Behavior of Unglazed Rear-Insulated PVT Collector

Information

This subpackage contains four validation models for the electrical performance of the PVT_UI collector, aligned with the same four ISO 9806:2013 day types used in the Thermal subpackage.

Each model compares simulated and measured electrical output and computes the absorber-to-fluid heat transfer coefficient UAbsFluid using a datasheet-based method (Meertens et al., 2025).

The electrical model is based on the PVWatts V5 formulation and includes:

  • Temperature-dependent efficiency losses
  • Constant system loss factor (9 %)

The PV cell temperature is derived from the thermal model using a two-node coupling via UAbsFluid. This coupling ensures accurate representation of the thermal-electrical interaction.

Validation results show excellent agreement across all day types, with normalized MAE and RMSE values below 3.1% (Meertens et al., 2025). The model is robust to variations in UAbsFluid, confirming the reliability of the datasheet-based estimation.

References

  • 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.
  • Dobos, A. P. (2014). PVWatts Version 5 Manual. NREL/TP-6A20-62641

Contents

NameDescription
PVT_UI_Electrical_DayType1Test model for Unglazed Rear-Insulated PVT Collector
PVT_UI_Electrical_DayType2Test model for Unglazed Rear-Insulated PVT Collector
PVT_UI_Electrical_DayType3Test model for Unglazed Rear-Insulated PVT Collector
PVT_UI_Electrical_DayType4Test model for Unglazed Rear-Insulated PVT Collector

Revisions

  • July 7, 2025, by Lone Meertens:
    First implementation PVT model; tracked in IDEAS #1436 .