Estudo da transferência de calor com mudança de fase para a construção de um destilador de água

Abstract

The misuse of surface water bodies has already been limiting the availability of water in some parts of the world, so a more rational use of water in all areas becomes more and more necessary. In chemical laboratories, water distillation is still one of the most wasteful of water and energy, which may contribute to the worsening of the water crisis on the planet. Although there are already residential portable distillers that work with closed circuit cooling, they do not produce distilled water with purity required for use in a variety of laboratory applications. The most modern and efficient distillers designed for use in the laboratory are still not very accessible due to their high cost. Thus, the objective of the work is to develop a low energy water and energy consumption distiller, from heat transfer studies in boiling and condensation. In this context, a prototype of a water distiller was constructed that makes use of a closed circuit cooling system; A steel boiler with 500W and a heat-exchange system with aluminum cans. The prototype has undergone several tests that proved its good and high capacity of distilled water production, however, still needs some adjustments and even the replacement or replacement of a component of the cooling system. Once an adjustment stage is completed, the distiller is able to produce distilled water with purity, without wasting water and with low electrical consumption