Methodology for estimating building integrated photovoltaics electricity production under shadowing conditions and case study

RENEWABLE & SUSTAINABLE ENERGY REVIEWS

卷:31

Review

Masa-Bote, Daniel¹  Caamano-Martin, Estefania¹ 

[1] Univ Politecn Madrid, Inst Energia Solar, E-28040 Madrid, Spain

关键词: BIPV;    Shading;    System performance;   

DOI  :  10.1016/j.rser.2013.12.019

来源: Elsevier

【 摘 要 】

Building integrated photovoltaic (BIPV) systems are a relevant application of photovoltaics. In countries belonging to the International Energy Agency countries, 24% of total installed PV power corresponds to BIPV systems. Electricity losses caused by shadows over the PV generator have a significant impact on the performance of BIPV systems, being the major source of electricity losses. This paper presents a methodology to estimate electricity produced by BIPV systems which incorporates a model for shading losses. The proposed methodology has been validated on a one year study with real data from two similar PV systems placed on the south facade of a building belonging to the Technical University of Madrid. This study has covered all weather conditions: clear, partially overcast and fully overcast sky. Results of this study are shown at different time scales, resulting that the errors committed by the best performing model are below 1% and 3% in annual and daily electricity estimation. The use of models Which account for the reduced performance at low irradiance levels also improves the estimation of generated electricity. (C) 2014 Elsevier Ltd. All rights reserved.

【 授权许可】

Free