EN ISO 22975-3:2014

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements and classification
5 Test methods for assessing material properties as
  measure of absorber performance
6 Tests for assessing the thermal stability of absorber
  surfaces
7 Tests for determining the resistance to condensed
  water of absorber surfaces
8 Test for determining absorber surface corrosion resistance
  to high humidity air containing sulfur dioxide
9 Test report
Annex A (normative) - Procedure for determination of solar
        absorption and thermal emittance of absorber surfaces
Annex B (normative) - Temperature and failure time characteristics
        in assessment of thermal stability of absorber
        surface
Annex C (normative) - Temperature/condensation and failure time
        characteristics together with qualification scheme in
        assessment of resistance to condensed water of absorber
        surface
Annex D (informative) - Suitable designs for test apparatus to
        be used in the qualification testing of solar absorber
        surfaces
Bibliography

ISO 22975-3:2014 is applicable to the determination of the long term behaviour and service life of selective solar absorbers for use in vented flat plate solar collectors working under conditions corresponding to that in a typical solar domestic hot water system or combisystem.ISO 22975-3:2014 specifies a failure criterion of a solar absorber based on changes in optical performance of the absorber. The optical properties of interest are solar absorptance and thermal emittance.ISO 22975-3:2014 specifies durability testing procedures focused on resistance to high temperatures and condensation of water on the absorber surface as well as high humidity in the presence of sulfur dioxide.