EN ISO 22975-2:2016

European foreword
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Test overview
5 Durability
6 Performance
Annex A (informative) - Typical configuration of a heat-pipe
        for solar thermal application
Annex B (normative) - Test reports on a heat-pipe for solar
        thermal application
Bibliography

ISO 22975-2:2016 specifies definitions and test methods for durability and performance of heat-pipes for solar thermal application.ISO 22975-2:2016 is applicable to heat-pipes for use with evacuated tubes, including glass-metal sealed evacuated tubes and double-glass evacuated tubes, as well as with flat plate collectors.ISO 22975-2:2016 provides test methods for determining durability of the heat-pipe, including high temperature resistance and freeze resistance.ISO 22975-2:2016 also provides test methods for measuring performance of the heat-pipe, including starting temperature, temperature uniformity and heat transfer power of the heat-pipe.ISO 22975-2:2016 is only applicable to gravity heat-pipes.