DIN EN 12975-2:2006-06
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
THERMAL SOLAR SYSTEMS AND COMPONENTS - SOLAR COLLECTORS - PART 2: TEST METHODS
Hardcopy , PDF
03-01-2014
English
01-12-2013
Foreword
Introduction
1 Scope
2 Normative 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 Inorganic 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 procedure
5.5.3 Test conditions
5.5.4 Results
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
5.9.2 Negative pressure test of the collector
5.10 Impact resistance test (optional)
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 performance 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 state 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 capacity
6.3.6 Collector incidence angle modifier
Annex A (normative) Schematics for durability and
reliability tests
Annex B (normative) Durability and reliability test report
sheets
B.1 Record of test sequence and summary of main
results
B.2 Internal pressure test for inorganic absorbers
B.2.1 Technical details of collector
B.2.2 Test conditions
B.2.3 Test results
B.3 Internal pressure test for absorbers made of organic
materials
B.3.1 Technical details of collector
B.3.2 Test conditions
B.3.3 Test results
B.4 High-temperature resistance test
B.4.1 Method used to heat collectors
B.4.2 Test conditions
B.4.3 Test results
B.5 Exposure test
B.5.1 Test conditions
B.5.2 Test results
B.5.3 Climatic conditions for all days during the test
B.5.4 Time periods in which irradiance and surrounding
air temperature have values greater than those
specified in Table 4
B.5.5 Inspection results
B.6 External thermal shock test:
B.6.1 Test conditions
B.6.2 Test results
B.7 Internal thermal shock test:
B.7.1 Test conditions
B.7.2 Test results
B.8 Rain penetration test
B.8.1 Test conditions
B.8.2 Test results
B.9 Freeze resistance test
B.9.1 Collector type
B.9.2 Test conditions
B.9.3 Test results
B.10 Mechanical load test
B.10.1 Positive pressure test of the collector cover
B.10.2 Negative pressure test of fixings between the
cover and the collector box
B.10.3 Negative pressure test of collector mountings
B.11 Impact resistance test using steel balls
B.11.1 Test conditions
B.11.2 Test procedure
B.11.3 Test results
B.12 Impact resistance test using ice balls
B.12.1 Test conditions
B.12.2 Test procedure
B.12.3 Test results
B.13 Final inspection results
Annex C (normative) Stagnation temperature of liquid
heating collectors
C.1 General
C.2 Determination of stagnation temperature
Annex D (normative) Performance test report for glazed
solar collectors
D.1 General
D.2 Solar collector description
D.3 Test results
Annex E (normative) Performance test report for unglazed
solar collectors
E.1 General
E.2 Solar collector description
E.3 Test results
Annex F (normative) Modelling of the coefficients c[1] to c[6]
of the collector model of 6.3
Annex G (normative) Measurement of effective thermal
capacity
G.1 Test installation
G.2 Indoor test procedure
G.2.1 General
G.2.2 Measurements
G.2.3 Calculation of the effective thermal capacity
G.2.4 Determination of effective thermal capacity from
experimental data
G.3 Outdoor or solar irradiance simulator test procedure
Annex H (informative) Comparison of the collector model
of 6.1 to the collector model of 6.3
Annex I (informative) Properties of water
I.1 Density of water (at 1 bar) in kg/m[3]
I.2 Specific heat capacity of water (at 1 bar) in kJ/(kg K)
Annex J (informative) Performance test report summary for
quasi dynamic test method
Annex K (informative) General guidelines for the assessment
of uncertainty in solar collector efficiency
testing
K.1 Introduction
K.2 Measurement uncertainties in solar collector
efficiency testing
Annex L (informative) Determination of the pressure drop
across a collector
L.1 General
L.2 Test installation
L.3 Preconditioning of the collector
L.4 Test procedure
L.5 Measurements
L.6 Pressure drop caused by fittings
L.7 Test conditions
L.8 Calculation and presentation of results
Bibliography
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