Encontro de Energia no Meio Rural

Abstract

CARVALHO, Paulo Cesar Marques de, PONTES, Ricardo Silva Thé, OLIVEIRA JR, Demercil de Souza et al. Estudo estatístico de radiação solar visando o projeto de unidades de dessalinização acionadas por painéis fotovoltaicos sem baterias. In Procedings of the 5th Encontro de Energia no Meio Rural, 2004, Campinas (SP) [online]. 2004 [cited 09 October 2024]. Available from: <http://www.proceedings.scielo.br/scielo.php?script=sci_arttext&pid=MSC0000000022004000100059&lng=en&nrm=iso> .

Among several treatment processes suitable for the Northeastern semi-arid area of the Brazil, the reverse osmosis presents growing application. A plant of reverse osmosis that uses photovoltaic technology attends to the needs of that area, since it does not demand local electrical grid. The present paper shows a statistical study of radiation making use of data collected in the Department of Electrical Engineering of the Federal University of Ceará, in Fortaleza, and it has the aim of be used in the project of a plant of reverse osmosis supplied by photovoltaic panels. The results of the study allow the comparison of different number of panels, radiation levels used to supply the plant and times of operation. The results are exposed in form of graphs such as: solar radiation, histograms of solar radiation, accumulated time and maximum continuous periods with solar radiation above 300 and 500 W/m². It was observed considerable annual differences in the behaviour of the radiation, as well as a gradual variation along one year, what reflects the annual difference of the radiation behaviour in wet and dry periods, and this will influences directly the strategy of operation of the plant.