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Title: Prediction of diffuse horizontal irradiance using a new climate zone model
Authors: Abreu, Edgar F.M.
Canhoto, Paulo
Costa, Maria João
Keywords: Diffuse horizontal irradiance
Global horizontal irradiance
Direct normal irradiance
Clearness index
Diffuse fraction
Separation method
Issue Date: 2019
Publisher: Renewable and Sustainable Energy Reviews
Citation: Edgar F.M. Abreu, Paulo Canhoto, Maria João Costa, Prediction of diffuse horizontal irradiance using a new climate zone model, Renewable and Sustainable Energy Reviews, 110, pp. 28-42, 2019.
Abstract: Knowledge on the diffuse horizontal irradiance (DHI), and direct normal irradiance (DNI) is crucial for the estimation of the irradiance on tilted surfaces, which in turn is critical for photovoltaic (PV) applications and for designing and simulating concentrated solar power (CSP) plants. Since global horizontal irradiance (GHI) is the most commonly measured solar radiation variable, it is advantageous for establishing a suitable method that uses it to compute DHI and DNI. In this way, a new model for predicting the diffuse fraction (K_d) based on the climate zone is proposed, using only the clearness index (K_t) as the predictor and 1-min resolution GHI data. A review of the literature on models that use hourly and sub-hourly K_t values to compute K_d was also carried out, and an extensive performance assessment of both the proposed model and the models from the literature was conducted using ten statistical indicators and a global performance index (GPI). A set of model parameters was determined for each climate zone considered in this study (arid, high albedo, temperate and tropical) using 48 worldwide radiometric stations. It was found that the best overall performing model was the model proposed in this work.
ISSN: 1364-0321
Type: article
Appears in Collections:ICT - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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