BS EN 12975-1:2006+A1:2010 Thermal solar systems and components. Solar collectors. General requirements
BS EN 12975-1 is a European Standard which specifies requirements on durability (including mechanical strength), reliability and safety for liquid heating solar collectors. It also includes provisions for evaluation of conformity to these requirements.
It is not applicable to those collectors in which the thermal storage unit is an integral part of the collector to such an extent, that the collection process cannot be separated from the storage process for the purpose of making measurements of these two processes. It is basically applicable to concentrating collectors; thermal performance testing as given in BS EN 12975-2:2006, 6.3. (quasi dynamic testing) is also applicable to most concentrating collector designs, from stationary non-imaging concentrators as CPCs to high concentrating tracking designs.
Collectors that are custom-built (built in, roof integrated collectors that do not comprise factory made modules and are assembled directly on the place of installation) cannot be tested in their actual form for durability, reliability and thermal performance according to this standard. Instead, a module with the same structure as the ready collector is tested. The module gross area in the case of custom built collectors should be at least 2 m2. The test is valid only for larger collectors, than the tested module.
For collectors the national and European Guidelines for Structural Planning and overhead glazing are not valid.
Therefore this standard should be applied for the design of the static of the collector.
Contents of BS EN 12975-1:
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Durability and reliability
5.1 Materials and design
5.2 Required tests
5.3 Pass criteria
5.3.1 General
5.3.2 Internal pressure for absorber
5.3.3 High temperature resistance
5.3.4 Exposure
5.3.5 External thermal shock
5.3.6 Internal thermal shock
5.3.7 Rain penetration
5.3.8 Mechanical load test
5.3.9 Thermal performance
5.3.10 Freeze resistance test
5.4 Procedure
6 Safety
7 Collector identification
7.1 Drawings and data sheet
7.2 Labelling
7.3 Installer instruction manual
Annex A (informative) Description of solar collectors materials and manufacture
A.1 General
A.2 Absorbers
A.3 Transparent covers
A.4 Insulation materials
A.5 Reflectors
A.6 Diffusion barriers
Annex B (informative) Environmental protection
B.1 Heat transfer fluid
B.2 Insulation materials
B.3 Recycling of the collector materials
Annex C (informative) Tests to be repeated in collector design modifications
Bibliography
