The National Center of Renewable Energy of Spain (CENER) began shortly the new season of tests Calibration for pyranometers and the Solar Radiation Measurement Stations Audits season. CENER Solar Thermal Testing Laboratory is the first and only one in Spain to be accredited for pyranometers calibration. The calibration is based on the International Standard ISO 9847 – “Solar Energy- Calibration of field pyranometers by comparison to a reference pyranometer”.
The calibration tests are performed outdoors on a horizontal mounting position, suitable for meteorological and resource measurement equipment. The test measurements are performed at the CENER BSRN radiometric station located in Sarriguren (Navarra).
Audits to Solar Radiation Measurement Stations are performed in situ, according to the existing layout and the placement of the station. During the audit the configuration and installation of instrumentation are checked. The audit also includes the comparison of the radiation measurement (comparison with CENER portable station, traceable to World Radiation Center (PMOD-WRC, Davos-Suiza) World Radiometric Reference (WRR)).
Nowadays, besides to the activities above mentioned, Measurement and Characterization Area at Solar Thermal Energy Department in CENER is a reference in:
- Evaluation and Characterisation of Systems and Components:Thermal Performance and Durability Tests of collectors and thermal solar systems (Standards EN-12975, EN-12976, OG-100). CSP Components testing.
- Solar Radiation Estimation: Development and improvement of direct solar radiation models, Estimation of global and direct radiation from satellite images, Estimation of solar radiation from Numerical Weather Prediction (MWP) Models, TMY generation including solar radiation and related variables.
- Measurement of Solar Radiation: Guidance on the configuration and setting up of measurement stations, Monitoring of the measurement station, Treatment and quality control of recorded data.
- Solar Radiation Forecasting: daily, hourly and intradaily solar radiation forecasting.
Due to the latitude in which the testing facilities are located and the requirements regarding minimum solar elevation and ambient temperatures, the season of calibration of pyranometers and technical audits of meteorological stations in CENER will begin on March 1 and will extend until the end of October.
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