Refractive concentrator optics architectures, tracker precision, and cumulative energy harvest

Schriemer, Henry; Cook, J P; Sharma, Pratibha; Carle, F.; White, P.; Tatsiankou, Viktar; Bosscher, N.; Haysom, Joan E.; Dragomirescu, Elena; Hinzer, Karin

doi:10.1109/pvsc.2015.7356408

Cited by 1 publication

(1 citation statement)

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“…The device was situated on the same mechanical plate assembly as an Eppley model NIP pyrheliometer and an ASD FieldSpec 3 spectroradiometer, which measures spectral DNI in the 350-1830 nm range. The assembly was mounted on a Golden Sun GS-3500 dualaxis tracking system to point these instruments directly at the sun to within accuracy of ±0.2 • (Schriemer et al, 2015). SSIM SN101 was initially calibrated against the ASD spectroradiometer through direct on-sun comparison, using the same approach as at NREL.…”

Section: Seasonal Field Trialsmentioning

confidence: 99%

Design principles and field performance of a solar spectral irradiance meter

et al. 2016

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A solar spectral irradiance meter (SSIM), designed for measuring the direct normal irradiance (DNI) in six wavelength bands, has been combined with models to determine key atmospheric transmittances and the resulting spectral irradiance distribution of DNI under all sky conditions. The design principles of the SSIM, implementation of a parameterized transmittance model, and field performance comparisons of modeled solar spectra with reference radiometer measurements are presented. Two SSIMs were tested and calibrated at the National Renewable Energy Laboratory (NREL) against four spectroradiometers and an absolute cavity radiometer. The SSIMs' DNI was on average within 1% of the DNI values reported by one of NREL's primary absolute cavity radiometers. An additional SSIM was installed at the SUNLAB Outdoor Test Facility in September 2014, with ongoing collection of environmental and spectral data. The SSIM's performance in Ottawa was compared against a commercial pyrheliometer and a spectroradiometer over an eight month study. The difference in integrated daily spectral irradiance between the SSIM and the ASD spectroradiometer was found to be less than 1%. The cumulative energy density collected by the SSIM over this duration agreed with that measured by an Eppley model NIP pyrheliometer to within 0.5%. No degradation was observed.

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Section: Seasonal Field Trialsmentioning

confidence: 99%