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上传于：2020-06-22

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    188宝金博页面版: Design principles and field performance of a solar spectral irradiance meter

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    内容提示： Design principles and f i eld performance of a solar spectralirradiance meterV. Tatsiankoua,? , K. Hinzer a , J. Haysom a , H. Schriemer a , K. Emery b , R. Beal ca University of Ottawa, SUNLAB, Ottawa, Ontario K1N 6N5, Canadab National Renewable Energy Laboratory, Golden, CO 80401, USAc COFOVO Energy Inc., Ottawa, Ontario K1N 6N5, CanadaReceived 8 September 2015; received in revised form 29 February 2016; accepted 25 March 2016Available online 18 April 2016Communicated by: Associate Editor David RenneAbs...

    文档格式：PDF | 页数：9 | 浏览次数：26 | 上传日期：2020-06-22 17:09:42 | 文档星级：
    Design principles and f i eld performance of a solar spectralirradiance meterV. Tatsiankoua,⇑ , K. Hinzer a , J. Haysom a , H. Schriemer a , K. Emery b , R. Beal ca University of Ottawa, SUNLAB, Ottawa, Ontario K1N 6N5, Canadab National Renewable Energy Laboratory, Golden, CO 80401, USAc COFOVO Energy Inc., Ottawa, Ontario K1N 6N5, CanadaReceived 8 September 2015; received in revised form 29 February 2016; accepted 25 March 2016Available online 18 April 2016Communicated by: Associate Editor David RenneAbstractA solar spectral irradiance meter (SSIM), designed for measuring the direct normal irradiance (DNI) in six wavelength bands, hasbeen combined with models to determine key atmospheric transmittances and the resulting spectral irradiance distribution of DNI underall sky conditions. The design principles of the SSIM, implementation of a parameterized transmittance model, and f i eld performancecomparisons of modeled solar spectra with reference radiometer measurements are presented. Two SSIMs were tested and calibrated atthe 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 SSIMwas installed at the SUNLAB Outdoor Test Facility in September 2014, with ongoing collection of environmental and spectral data. TheSSIM’s performance in Ottawa was compared against a commercial pyrheliometer and a spectroradiometer over an eight month study.The dif f erence 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 pyrheliome-ter to within 0.5%. No degradation was observed.? 2016 Elsevier Ltd. All rights reserved.Keywords: Solar spectral irradiance meter; SSIM; Direct normal spectral irradiance; Solar resource assessment; Atmospheric parameterization; Solarspectrum1. IntroductionPhotovoltaic (PV) system performance fundamentallydepends on the incident solar spectrum, which f l uctuatesboth temporally and geographically. Dif f erent solar tech-nologiesrespondtosuchf l uctuationsinvaryingdegree,withsingle junction devices typically less inf l uenced by spectralchanges than are multi-junction solar cells (MJSC). AMJSC, used terrestrially in concentrator photovoltaicsystems, consists of series-connected subcells with dif f erentbandgaps for more ef f i cient use of the solar spectrum thanis possible with a single junction because thermalizationand transmission losses are reduced. In such a structure,the lowest current-generating subcell limits the performanceof other subcells, so for optimal performance a MJSC isdesigned to be near current matched for a specif i c spectrum,such as the AM1.5D from the ASTM G173 standard(McMathon et al., 2002; Guter et al., 2009; Wiemer et al.,2011). But under outdoor conditions the solar spectrumdeviates from the reference due to varying meteorologicalconditions, resulting in subcell current mismatch and thusreduced concentrator photovoltaic system performancehttp://dx.doi.org/10.1016/j.solener.2016.03.0540038-092X/? 2016 Elsevier Ltd. All rights reserved.⇑Corresponding author. Tel.: +1 613 413 1877.E-mail address: viktar.tatsiankou@gmail.com (V. Tatsiankou).www.elsevier.com/locate/solenerAvailable online at www.sciencedirect.comScienceDirectSolar Energy 133 (2016) 94–102

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