PREN 12975-3-1 : DRAFT 2011

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 surface
7 Tests for determining the resistance to
  condensed water of absorber surface
8 Test for determining absorber surface corrosion
  resistance to high humidity air containing
  sulphur dioxide
9 Report
Annex A (normative) - Procedure for determination
        of solar absorptance and thermal emittance
        of absorber surface
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 surface
Bibliography

Describes 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.