What is it about?
A photovoltaic solar cell absorbs solar photons having wavelengths between 300 and 1100 nm to generate electric current. So far there is no broadband radiation model to produce spectral band irradiance in this interval. We developed a method to fill this gap. In this paper we introduced this method and evaluated it using observational spectral irradiance data. The results show that the relative mean bias and relative RMS difference are -0.4% and 7.68% under clear-sky condition and -3.31% and18.48% under all-sky conditions, respectively.
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Why is it important?
To our knowledge, this is the first scheme to determine the spectral band irradiance for photovoltaic devices. Since it depends on the global horizontal irradiance, the method can be combined with any broadband solar radiation scheme to generate the spectral band irradiance. We believe the use of this method will improve the performance of solar energy forecasting system.
Perspectives
When this paper was published in 2017, I was very excited because this work is very challenging and I faced many difficulties. The most difficult part work is lack of observations. So it is hard to test if the method is accurate and convince people to trust it. After hard investigations, we overcame these difficulties and achieved satisfied results. I hope our this paper will be useful to the solar energy community.
Dr Zhian Sun
Bureau of Meteorology
Read the Original
This page is a summary of: Parametrization of solar spectral irradiance between 300 and 1100 nm for photovoltaic devices, Quarterly Journal of the Royal Meteorological Society, July 2017, Wiley,
DOI: 10.1002/qj.3089.
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