Encontro de Energia no Meio Rural
Agrener

Abstract

LEAL, Sergio da S and TIBA, Chigueru. Iluminância e irradiação solar global na região Nordeste do Brasil. In Proceedings of the 6. Encontro de Energia no Meio Rural, 2006, Campinas (SP, Brazil) [online]. 2006 [cited 26 April 2024]. Available from: <http://www.proceedings.scielo.br/scielo.php?script=sci_arttext&pid=MSC0000000022006000200003&lng=en&nrm=iso> .

In Brazil and particularly in the Northeast of Brazil, illuminance measures are not part of routine meteorological station measures, and therefore they are still rare than solar irradiation measures. In this context, two stations were installed in Pernambuco: one in Recife (maritime tropical climate) in April 2003 and the other in Pesqueira (tropical and semi-arid) in September 2004 for carrying out simultaneous measurements of hourly solar irradiation and illuminance which permit the modeling and the statistic validation of the relationship between these two parameters and with this, makes possible the estimation of illuminance where there existed only information on solar irradiation. The Alados et al. model with local coefficients showed a superior statistical performance, producing a mean bias deviation in the order of 3% and 1% and root mean quadratic deviation of 10% and 3% respectively for Recife and Pesqueira.

Keywords : Iluminância; Regressão múltipla; Modelagem; eficiência luminosa; Relação entre irradiação solar global; Iluminância global.