Estudo teórico e experimental de um dessalinizador solar para tratar água salobra.

Abstract

The northeast part of Brazil frequently undergoes long periods of drought that causes several problems to the rural workers because they still did not know how to live with the dry. Some researchers have been developing and adapting techniques in order to enable rural workers to obtain their income even in the dry seasons and then avoiding the rural exodus. This work presents the integrated desalinization system that is fed with briny or salty water. It was studied the humidification/dehumidification desalinization process which emulates the natural rain cycles and does not present the most part of the problems traditional desalinization techniques do. Many factors were taken into account: air flowrate, salty water temperature and flowrate, and sprinklers positioning. A mathematical model have been proposed to predict salty water heating via solar radiation in order to demonstrate that this source is able to supply enough energy. Obtained results show a desalinated water flowrate of about 30 kg/h with 67 ppm TDS from a salty water of 584 ppm TDS.