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PD IEC/TS 62788-7-2:2017 Measurement procedures for materials used in photovoltaic modules - Environmental exposures. Accelerated weathering tests of polymeric materials, 2017
- undefined
- CONTENTS
- FOREWORD
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Artificial weathering exposures [Go to Page]
- 4.1 General
- 4.2 Method A: filtered xenon arc with daylight filters [Go to Page]
- 4.2.1 General
- Figures [Go to Page]
- Figure 1 – Spectral irradiance power distributions: solar, xenon arc, fluorescent UV [Go to Page]
- 4.2.2 Light source, irradiance levels
- 4.2.3 Temperature
- Tables [Go to Page]
- Table 1 – Method A exposure conditions [Go to Page]
- 4.2.4 Moisture (relative humidity, RH)
- 4.2.5 Length of exposure
- 4.3 Method B: Fluorescent UVA-340 [Go to Page]
- 4.3.1 General
- 4.3.2 Light source, irradiance levels
- 4.3.3 Temperature
- 4.3.4 Relative humidity
- 4.3.5 Length of exposure
- Table 2 – Method B exposure conditions
- 5 Weathering specimens [Go to Page]
- 5.1 General
- 5.2 Specimen constructions [Go to Page]
- 5.2.1 General
- 5.2.2 Single film or sheet
- 5.2.3 Design specific laminate
- 5.2.4 Single component with representative filter
- 5.2.5 Design specific laminate with separable film
- 6 Reporting – artificial weathering exposure [Go to Page]
- Table 3 – Weathering specimen types – examples
- Annex A (informative) Characterizing the conditions of polymeric components in fielded modules [Go to Page]
- A.1 General
- A.2 Climate data and models for module temperature [Go to Page]
- A.2.1 General
- A.2.2 Irradiance levels
- Figure A.1 – Module temperature, UV irradiance, and environmental temperaturefor a representative July day in Phoenix, AZ [Go to Page]
- A.2.3 Temperature
- Figure A.2 – (A) Hourly daytime temperatures for Miami over one year and (B) Annual hourly daytime temperatures for Miami, plotted as a cumulative distribution
- Table A.1 – Average solar radiant dosage levels for benchmark locations, 2000-2015 [Go to Page]
- A.2.4 Humidity
- Figure A.3 – RH for a representative day in Miami, Florida [Go to Page]
- A.2.5 Backside irradiance
- Figure A.4 – Relative humidity values [Go to Page]
- A.2.6 Summary
- Figure A.5 – Measured solar irradiance on front and back of PV module
- A.3 Data from module arrays
- Table A.2 – Summary of estimated module conditions from climate data
- Table A.3 – Measured annual temperature data for fielded modules
- Annex B (informative) Development of the test methods in this document and recommendations for use [Go to Page]
- B.1 General
- B.2 UV exposure for components compared to PV module standards
- B.3 Light source selection
- B.4 Irradiance levels [Go to Page]
- B.4.1 Method for specification
- B.4.2 Irradiance set-points
- B.4.3 Length of exposure, dosage levels
- Table B.1 – Reference irradiance levels
- Table B.2 – 1-year front side dosage levels for selected outdoor locations compared to 1 000 h laboratory exposures in this document
- B.5 Exposure temperature and relative humidity [Go to Page]
- B.5.1 Target set points
- B.5.2 Temperature set points in Methods A and B
- Bibliography [Go to Page]