%0 Journal Article %1 AntonanzasTorres2013Evaluation %A Antonanzas-Torres, F. %A Sanz-Garcia, A. %A Mart\'ınez-de Pisón, F. J. %A Perpi\ nán-Lamigueiro, O. %D 2013 %J Renewable Energy %K energy statistics solar renewables model CMSAF %P 604--614 %R 10.1016/j.renene.2013.06.008 %T Evaluation and improvement of empirical models of global solar irradiation: Case study northern Spain %U http://dx.doi.org/10.1016/j.renene.2013.06.008 %V 60 %X Highlights • Proposed methodology to build new models adjusted to specific on-site characteristics. • Evaluation of model robustness via bootstrapping of two new and 22 existing models. • Best performing model in validation and testing built on the proposed methodology. • Annual estimated irradiation with the new model within the tolerance of pyranometers. Abstract This paper presents a new methodology to build parametric models to estimate global solar irradiation adjusted to specific on-site characteristics based on the evaluation of variable importance. Thus, those variables highly correlated to solar irradiation on a site are implemented in the model and therefore, different models might be proposed under different climates. This methodology is applied in a study case in La Rioja region (northern Spain). A new model is proposed and evaluated on stability and accuracy against a review of twenty-two already existing parametric models based on temperatures and rainfall in seventeen meteorological stations in La Rioja. The methodology of model evaluation is based on bootstrapping, which leads to achieve a high level of confidence in model calibration and validation from short time series (in this case five years, from 2007 to 2011). The model proposed improves the estimates of the other twenty-two models with average mean absolute error (MAE) of 2.195 MJ/m2day and average confidence interval width (95\% C.I., n = 100) of 0.261 MJ/m2day. 41.65\% of the daily residuals in the case of SIAR and 20.12\% in that of SOS Rioja fall within the uncertainty tolerance of the pyranometers of the two networks (10\% and 5\%, respectively). Relative differences between measured and estimated irradiation on an annual cumulative basis are below 4.82\%. Thus, the proposed model might be useful to estimate annual sums of global solar irradiation, reaching insignificant differences between measurements from pyranometers.

@article{AntonanzasTorres2013Evaluation, abstract = {Highlights • Proposed methodology to build new models adjusted to specific on-site characteristics. • Evaluation of model robustness via bootstrapping of two new and 22 existing models. • Best performing model in validation and testing built on the proposed methodology. • Annual estimated irradiation with the new model within the tolerance of pyranometers. Abstract This paper presents a new methodology to build parametric models to estimate global solar irradiation adjusted to specific on-site characteristics based on the evaluation of variable importance. Thus, those variables highly correlated to solar irradiation on a site are implemented in the model and therefore, different models might be proposed under different climates. This methodology is applied in a study case in La Rioja region (northern Spain). A new model is proposed and evaluated on stability and accuracy against a review of twenty-two already existing parametric models based on temperatures and rainfall in seventeen meteorological stations in La Rioja. The methodology of model evaluation is based on bootstrapping, which leads to achieve a high level of confidence in model calibration and validation from short time series (in this case five years, from 2007 to 2011). The model proposed improves the estimates of the other twenty-two models with average mean absolute error (MAE) of 2.195 MJ/m2day and average confidence interval width (95\% C.I., n = 100) of 0.261 MJ/m2day. 41.65\% of the daily residuals in the case of SIAR and 20.12\% in that of SOS Rioja fall within the uncertainty tolerance of the pyranometers of the two networks (10\% and 5\%, respectively). Relative differences between measured and estimated irradiation on an annual cumulative basis are below 4.82\%. Thus, the proposed model might be useful to estimate annual sums of global solar irradiation, reaching insignificant differences between measurements from pyranometers.}, added-at = {2018-06-18T21:23:34.000+0200}, author = {Antonanzas-Torres, F. and Sanz-Garcia, A. and Mart\'{\i}nez-de Pis\'{o}n, F. J. and Perpi\ {n}\'{a}n-Lamigueiro, O.}, biburl = {https://www.bibsonomy.org/bibtex/22e65ccab98137f76265d67ee4f0d1a3c/pbett}, citeulike-article-id = {13127962}, citeulike-attachment-1 = {Antonanzas-TorresSanz-Garciaea2013.pdf; /pdf/user/pbett/article/13127962/958673/Antonanzas-TorresSanz-Garciaea2013.pdf; c1c494993a3015228f5398b7744d5b133f6f0fee}, citeulike-linkout-0 = {http://dx.doi.org/10.1016/j.renene.2013.06.008}, comment = {(private-note)Attached preprint is from author's site http://oscarperpinan.github.io/}, doi = {10.1016/j.renene.2013.06.008}, file = {Antonanzas-TorresSanz-Garciaea2013.pdf}, interhash = {2fd09db5046d03a58626e1848785b08f}, intrahash = {2e65ccab98137f76265d67ee4f0d1a3c}, issn = {09601481}, journal = {Renewable Energy}, keywords = {energy statistics solar renewables model CMSAF}, month = dec, pages = {604--614}, posted-at = {2014-04-06 17:10:44}, priority = {2}, timestamp = {2018-06-22T18:34:20.000+0200}, title = {Evaluation and improvement of empirical models of global solar irradiation: Case study northern Spain}, url = {http://dx.doi.org/10.1016/j.renene.2013.06.008}, volume = 60, year = 2013 }