Chapter 13: A Simple Estimation of UV Irradiance Under Clear-Sky Conditions

Olivier Rosseler, Aron Habte, Manajit Sengupta, Christian Gueymard, David Burns

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


Accelerated aging tests are designed to estimate the useful life of products in their end-use environment. There is currently no simple way to answer the age-old question: “How long should I run my weathering test to reproduce 1 year of outdoor aging?" At the very least, there is need to (1) evaluate the acceleration rate associated with each stress factor and (2) estimate the intensity of the stress factors that the products under scrutiny are exposed to in natural aging. In this chapter, a model is introduced to calculate the ratio between ultraviolet (UV) irradiance and global horizontal irradiance (GHI). This method was empirically derived from measured or simulated irradiance data and validated against outdoor observations. This ratio provides a simple way to estimate the UV dose that samples are exposed to at any outdoor location.

Original languageAmerican English
Title of host publicationService Life Prediction of Polymers and Coatings
Subtitle of host publicationEnhanced Methods
EditorsC. C. White, M. E. Nichols, J. E. Pickett
Number of pages10
ISBN (Electronic)9780128183670
StatePublished - 2020

Bibliographical note

Publisher Copyright:
© 2020 Elsevier Inc.

NREL Publication Number

  • NREL/CH-5D00-73048


  • End-use environment
  • Global horizontal irradiance
  • Natural weathering
  • Service life prediction
  • Ultraviolet
  • Weathering


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