Standardization of Solar Mirror Reflectance Measurements - Round Robin Test: Preprint

Research output: Contribution to conferencePaper

Abstract

Within the SolarPaces Task III standardization activities, DLR, CIEMAT, and NREL have concentrated on optimizing the procedure to measure the reflectance of solar mirrors. From this work, the laboratories have developed a clear definition of the method and requirements needed of commercial instruments for reliable reflectance results. A round robin test was performed between the threelaboratories with samples that represent all of the commercial solar mirrors currently available for concentrating solar power (CSP) applications. The results show surprisingly large differences in hemispherical reflectance (sh) of 0.007 and specular reflectance (ss) of 0.004 between the laboratories. These differences indicate the importance of minimum instrument requirements and standardizedprocedures. Based on these results, the optimal procedure will be formulated and validated with a new round robin test in which a better accuracy is expected. Improved instruments and reference standards are needed to reach the necessary accuracy for cost and efficiency calculations.
Original languageAmerican English
Number of pages11
StatePublished - 2010
EventSolarPACES 2010 - Perpignan, France
Duration: 21 Sep 201024 Sep 2010

Conference

ConferenceSolarPACES 2010
CityPerpignan, France
Period21/09/1024/09/10

NREL Publication Number

  • NREL/CP-5500-49189

Keywords

  • reflectance measurement procedure
  • reflectometer
  • round robin test
  • solar mirror characterization
  • spectrophotometer
  • standardization

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