Intercomparison of 51 Radiometers for Determining Global Horizontal Irradiance and Direct Normal Irradiance Measurements

Aron Habte, Manajit Sengupta, Afshin Andreas, Stephen Wilcox, Thomas Stoffel

Research output: Contribution to journalArticlepeer-review

39 Scopus Citations

Abstract

Accurate solar radiation measurements require properly installed and maintained radiometers with calibrations traceable to the World Radiometric Reference. This study analyzes the performance of 51 commercially available and prototype radiometers used for measuring global horizontal irradiances or direct normal irradiances. These include pyranometers, pyrheliometers, rotating shadowband radiometers, and a pyranometer with an internal shading mask deployed at the National Renewable Energy Laboratory's (NREL) Solar Radiation Research Laboratory. The radiometers in this study were deployed for one year (from April 1, 2011, through March 31, 2012), and their measurements were compared under clear-sky, partly cloudy, and mostly cloudy conditions to reference values of low estimated measurement uncertainties. The intent of this paper is to present a general overview of each radiometer's performance based on the instrumentation and environmental conditions available at NREL.
Original languageAmerican English
Pages (from-to)372-393
Number of pages22
JournalSolar Energy
Volume133
DOIs
StatePublished - 2016

NREL Publication Number

  • NREL/JA-5D00-64937

Keywords

  • DHI
  • diffuse horizontal irradiance
  • direct normal irradiance
  • DNI
  • GHI
  • global horizontal irradiance
  • pyranometer
  • pyrheliometer
  • rotating shadowband radiometer
  • RSR

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