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Development and Improvement of a Transient Temperature Model of PV Modules: Concept of Trailing Data
  • +3
  • Whyte Goodfriend,
  • Pieters E Bart,
  • Merdzhanova Tsvetelina,
  • Agbo Solomon,
  • Ezema Fabian,
  • Uwe Rau
Whyte Goodfriend
Department of Physics and Astronomy, University of Nigeria Nsukka, IEK-5 Photovoltaik, Forschungszentrum Jülich GmbH

Corresponding Author:

Pieters E Bart
IEK-5 Photovoltaik, Forschungszentrum Jülich GmbH
Merdzhanova Tsvetelina
IEK-5 Photovoltaik, Forschungszentrum Jülich GmbH
Agbo Solomon
IEK-5 Photovoltaik, Forschungszentrum Jülich GmbH
Ezema Fabian
Department of Physics and Astronomy, University of Nigeria Nsukka
Uwe Rau
Faculty of Electrical Engineering and Information Technology, Jülich Aachen Research Alliance (JARA-Energy, RWTH Aachen University, IEK-5 Photovoltaik, Forschungszentrum Jülich GmbH

Abstract

The development of a transient temperature model of photovoltaic (PV) modules is presented in this paper. Currently, there are a few steady-state temperature models targeted at assessing and predicting the PV module temperature. One of the most commonly used models is the Faiman thermal model. This model is derived from the modified Hottel-Whillier-Bliss (HWB) model for flat-plate solar-thermal collector under steady-state conditions and assumes low or no thermal mass in the modules (i.e. short time constants such that transients are neglected, and steady-state conditions are assumed). The transient extension of the Faiman model we present in this paper introduces a thermal mass, which provides two advantages. First of all, it improves the temperature prediction under dynamic conditions. Second, our transient extension to the Faiman model allows the accurate parametrization of the Faiman model under dynamic conditions. We present our model and parametrization method. Furthermore, we applied the model and parametrization method to a one-year data set with 5 minute resolved outdoor module measurements. We demonstrate a significant improvement in temperature prediction for the transient model, especially under dynamic conditions.