Thermal Model to Quantify the Impact of Sub-Bandgap Reflectance on Operating Temperature of Fielded PV Modules

Michael Deceglie, Jonathan Bryan, Timothy Silverman, Zachary Holman

Research output: Contribution to journalArticlepeer-review

3 Scopus Citations

Abstract

Minimizing module heating is an effective way to increase the lifetime energy output of photovoltaic systems. Maximizing the reflection of light that is unusable for energy conversion is one of the most promising ways to reduce the operating temperature of fielded modules. We derive a model based on a steady-state energy balance to quantify the temperature benefit of cell or module optical modifications aimed at improving reflection of light with photon energies below the photovoltaic cell bandgap energy. This more detailed model is then simplified so that, from outdoor measured data, temperature differences arising from reflectance can be isolated from those arising from irradiance, wind speed, and module standard-test-condition efficiency.

Original languageAmerican English
Pages (from-to)246-250
Number of pages5
JournalSolar Energy
Volume220
DOIs
StatePublished - 15 May 2021

Bibliographical note

Publisher Copyright:
© 2021 International Solar Energy Society

NREL Publication Number

  • NREL/JA-5K00-78899

Keywords

  • Photovoltaic module degradation
  • Rear reflector
  • Silicon photovoltaic module
  • Sub-bandgap reflectance
  • Thermal management

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