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Improving The Accuracy of the Empirical Clear Sky Solar Irradiance Models

Improving The Accuracy of the Empirical Clear Sky Solar Irradiance Models Received: 29.03.2013 This paper is focused on improving the quality of nowcasting solar irradiance by enhancing the clear sky component of the model. A simple Accepted: 16.04.2013 linear correction for the average atmospheric transmittance is proposed. The Keywords: Solar irradiance, correction is based on the most recent measurements recorded prior the estimation, clear sky. forecasting moment. The proposed procedure was tested against data measured on the Solar Platform of the West University of Timisoara. Overall results demonstrates a notable improvement in the clear sky model accuracy. 1. Introduction Some models for nowcasting solar irradiance include a component for estimating solar irradiance under clear sky conditions. These models are constructed empirically, usually by fitting long term data series recorded in situ. The fitted parameters are frozen and used, as they are, into the estimation model applied to future time moments. Since the solar irradiance forecasting models are applied on data measured in situ (generally the forecasting models contain autoregressive terms), the clear sky model can be finely adjusted prior to the forecasting moment. In this paper, a procedure for improving the average atmospheric transmittance (as part of the simple empirical models for solar irradiance) is proposed. The adjustment is achieved http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annals of West University of Timisoara - Physics de Gruyter

Improving The Accuracy of the Empirical Clear Sky Solar Irradiance Models

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Publisher
de Gruyter
Copyright
Sciendo is a De Gruyter company © 2018. ALL RIGHTS RESERVED Powered by PubFactory
ISSN
1224-9718
DOI
10.1515/awutp-2015-0111
Publisher site
See Article on Publisher Site

Abstract

Received: 29.03.2013 This paper is focused on improving the quality of nowcasting solar irradiance by enhancing the clear sky component of the model. A simple Accepted: 16.04.2013 linear correction for the average atmospheric transmittance is proposed. The Keywords: Solar irradiance, correction is based on the most recent measurements recorded prior the estimation, clear sky. forecasting moment. The proposed procedure was tested against data measured on the Solar Platform of the West University of Timisoara. Overall results demonstrates a notable improvement in the clear sky model accuracy. 1. Introduction Some models for nowcasting solar irradiance include a component for estimating solar irradiance under clear sky conditions. These models are constructed empirically, usually by fitting long term data series recorded in situ. The fitted parameters are frozen and used, as they are, into the estimation model applied to future time moments. Since the solar irradiance forecasting models are applied on data measured in situ (generally the forecasting models contain autoregressive terms), the clear sky model can be finely adjusted prior to the forecasting moment. In this paper, a procedure for improving the average atmospheric transmittance (as part of the simple empirical models for solar irradiance) is proposed. The adjustment is achieved

Journal

Annals of West University of Timisoara - Physicsde Gruyter

Published: Dec 1, 2013

Keywords: Materials Sciences; Modeling and Simulations; Physics; Theoretical and Mathematical Physics; Condensed Matter Physics; Medical Physics

References