11 th International Concentrator Photovoltaics Conference Viktar - PowerPoint PPT Presentation

Next Generation Solar Spectral Irradiance Meter with Enhanced Reliability 11 th International Concentrator Photovoltaics Conference Viktar Tatsiankou , K. Hinzer, H. Schriemer, J. Haysom, and R. Beal April 15, 2015, CPV-11

Acknowledgements April 15, 2015 Viktar Tatsiankou 2

Introduction CPV industry ultimately desires the DNI and the solar spectrum Pyrheliometer Spectroradiometer + DNI Spectrum $80k Can we do better? April 15, 2015 Viktar Tatsiankou 3

Solar Spectral Irradiance Meter Provides spectral DNI ~10x cheaper than a spectroradiometer Measures  spectral DNI in 6 bands  temperature and pressure Models  spectral DNI, AOD, ozone and 108 mm water vapour absorptions  280-4000 nm spectral range  compact and rugged Features  RS-485 communication with a PC or a datalogger 124 mm April 15, 2015 Viktar Tatsiankou 4

History of SSIM First prototype deployed in 2013 Bandpass filter degradation and moisture ingress Problem: Solution: Rugged bandpass filters and custom aluminum enclosure 2013 2014 2015 [1] V. Tatsiankou, K. Hinzer, A. Muron et. al., "Solar resource assessment with a solar spectral irradiance meter," in 10th International Conference on Concentrator Photovoltaic Systems: CPV-10 , 2014, pp. 313-316. April 15, 2015 Viktar Tatsiankou 5

SSIM Deployments Ottawa April 15, 2015 Viktar Tatsiankou 6

SSIM GUI Software SSIM software reconstructs the solar spectrum April 15, 2015 Viktar Tatsiankou 8

Exploded View April 15, 2015 Viktar Tatsiankou 9

SSIM Calibration – NREL • Two SSIMs tested and calibrated NREL outdoor test facility at NREL with Keith Emery in November 2014. • NREL world-class instruments: – Spectroradiometer – Pyrheliometer, and – Absolute cavity radiometer (ACR). April 15, 2015 Viktar Tatsiankou 10

SSIM Calibration – NREL SSIMs SN102 and SN103 calibrated against NREL PGS100 spectroradiometer in 6 spectral channels during one hour on a sunny day April 15, 2015 Viktar Tatsiankou 11

SSIM Calibration – NREL Integrated SSIM spectra provide highly accurate DNI compared to NREL absolute cavity radiometer (ACR) April 15, 2015 Viktar Tatsiankou 12

SSIM in Ottawa 1 on sun since Sept. 27, 2014 2 3 4 1. The latest version of the SSIM 2. Calibrated SSIM 3. 1 st new generation SSIM SN101 4. Eppley pyrheliometer 5 5. ASD spectroradiometer April 15, 2015 Viktar Tatsiankou 13

SSIM Performance – Ottawa March 31, 2015 at 11:00 September 28, 2014 at 17:30 Good spectral agreement with the ASD spectroradiometer April 15, 2015 Viktar Tatsiankou 14

SSIM Performance – Ottawa Daily spectral difference remains largely within ± 5% April 15, 2015 Viktar Tatsiankou 15

SSIM Performance – Ottawa March 31, 2015 September 28, 2014 Integrated SSIM spectra provides accurate DNI data, even on cloudy days April 15, 2015 Viktar Tatsiankou 16

SSIM Performance – Ottawa April 15, 2015 Viktar Tatsiankou 17

SSIM Performance – Ottawa Cumulative energy density of SSIM and Eppley pyrheliometer agree to < 0.5% over 6 months April 15, 2015 Viktar Tatsiankou 17

Conclusion SSIM is a cost-effective, accurate and reliable alternative to a pyrheliometer and a spectroradiometer • Daily spectral difference is largely within ± 5% as compared to ASD spectroradiometer • Cumulative energy density is <0.5% as compared to Eppley pyrheliometer • No degradation for over 6 months April 15, 2015 Viktar Tatsiankou 18