PREN 12975-2 : DRAFT 2004

FOREWORD
1 SCOPE
2 REFERENCES
3 TERMS AND DEFINITIONS
4 SYMBOLS AND UNITS
5 RELIABILITY TESTING OF LIQUID HEATING COLLECTORS
  5.1 General
  5.2 Internal pressure tests for absorbers
       5.2.1 Metallic absorbers
       5.2.2 Absorbers made of organic materials
              (plastics or elastomers)
  5.3 High-temperature resistance test
       5.3.1 Objective
       5.3.2 Apparatus and procedure
       5.3.3 Test conditions
       5.3.4 Results
  5.4 Exposure test
       5.4.1 Objective
       5.4.2 Apparatus and procedure
       5.4.3 Test conditions
       5.4.4 Results
  5.5 External thermal shock test
       5.5.1 Objective
       5.5.2 Apparatus and procedures
       5.5.3 Test conditions
  5.6 Internal thermal shock test
       5.6.1 Objective
       5.6.2 Apparatus and procedure
       5.6.3 Test conditions
       5.6.4 Results
  5.7 Rain penetration test
       5.7.1 Objective
       5.7.2 Apparatus and procedure
       5.7.3 Test conditions
       5.7.4 Results
  5.8 Freeze resistance test
       5.8.1 Objective
       5.8.2 Apparatus and procedure
       5.8.3 Test conditions
       5.8.4 Results
  5.9 Mechanical load test
       5.9.1 Positive pressure test of the collector
              cover
       5.9.2 Negative pressure test of fixings between
              the cover and the collector box
       5.9.3 Negative pressure test of collector
             mountings
  5.10 Impact resistance test
       5.10.1 Objective
       5.10.2 Apparatus and procedure
       5.10.3 Test conditions
       5.10.4 Results
  5.11 Final inspection
  5.12 Test report
6 THERMAL PERFORMANCE TESTING OF LIQUID HEATING
  COLLECTORS
  6.1 Glazed solar collectors under steady state
       conditions including pressure drop)
       6.1.1 Collector mounting and location
       6.1.2 Instrumentation
       6.1.3 Test installation
       6.1.4 Outdoor steady-state efficiency test
       6.1.5 Steady-state efficiency test using a solar
              irradiance simulator
       6.1.6 Determination of the effective thermal
              capacity and the time constant of a collector
       6.1.7 Collector incidence angle modifier
       6.1.8 Determination of the pressure drop across a
              collector
  6.2 Unglazed solar collectors under steady conditions
       (including pressure drop)
       6.2.1 Collector mounting and location
       6.2.2 Instrumentation
       6.2.3 Test installation
       6.2.4 Outdoor steady state efficiency test
       6.2.5 Steady-state efficiency test using a solar
              irradiance simulator
       6.2.6 Determination of the effective thermal capacity
              and the time constant of a collector
       6.2.7 Incidence angle modifier (optional)
       6.2.8 Determination of the pressure drop across a
              collector
  6.3 Glazed and unglazed solar collectors under
       quasi-dynamic conditions
       6.3.1 Collector mounting and location
       6.3.2 Instrumentation
       6.3.3 Test installation
       6.3.4 Outdoor efficiency test
       6.3.5 Determination of the effective thermal
              capacitance
       6.3.6 Collector incidence angle modifier
              6.3.7 Determination of the pressure drop across a
              collector
ANNEX A (NORMATIVE) Schematics for durability and
                      reliability tests
ANNEX B (NORMATIVE) Durability and reliability test
                      report sheets
ANNEX C (NORMATIVE) Stagnation temperature of liquid
                      heating collectors
ANNEX D (NORMATIVE) Performance test report for glazed
                      solar collectors
ANNEX E (NORMATIVE) Performance test report summary for
                      glazed collectors
ANNEX F (NORMATIVE) Performance test for unglazed solar
                      collectors
ANNEX G (NORMATIVE) Performance test report summary for
                      unglazed collectors
ANNEX H (NORMATIVE) Modelling of the coefficients c[1] to
                      c[6] of the collector model of 6.3
ANNEX I (INFORMATIVE) Definition of areas of glazed liquid
                      heating collectors
ANNEX J (INFORMATIVE) Measurement of effective thermal
                      capacity
ANNEX L (INFORMATIVE) Properties of water (see ISO 9806-1)
ANNEX M (INFORMATIVE) Performance test report summary for
                      quasi dynamic test method
ANNEX N (INFORMATIVE) Comparison between EN 12975 and
                      ISO 9806
ANNEX O (INFORMATIVE) General guidelines for the assessment
                      of uncertainty in solar collector
                      efficiency testing
ANNEX P (INFORMATIVE) Determination of the pressure drop
                      across a collector
BIBLIOGRAPHY

Describes test methods for validating the durability, reliability and safety requirements for liquid heating collectors as specified in EN 12975-1.