Numerical Method for Angle-of-Incidence Correction Factors for Diffuse Radiation Incident Photovoltaic Modules

William Marion

Research output: Contribution to journalArticlepeer-review

41 Scopus Citations

Abstract

A numerical method is provided for solving the integral equation for the angle-of-incidence (AOI) correction factor for diffuse radiation incident photovoltaic (PV) modules. The types of diffuse radiation considered include sky, circumsolar, horizon, and ground-reflected. The method permits PV module AOI characteristics to be addressed when calculating AOI losses associated with diffuse radiation. Pseudo code is provided to aid users in the implementation, and results are shown for PV modules with tilt angles from 0 degrees to 90 degrees. Diffuse AOI losses are greatest for small PV module tilt angles. Including AOI losses associated with the diffuse irradiance will improve predictions of PV system performance.
Original languageAmerican English
Pages (from-to)344-348
Number of pages5
JournalSolar Energy
Volume147
DOIs
StatePublished - 2017

NREL Publication Number

  • NREL/JA-5J00-67995

Keywords

  • angle-of-incidence losses
  • diffuse solar radiation
  • model
  • numerical solution

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