Cálculo dos coeficientes de desempenho em um teste de um dessalinizador solar térmico com abastecimento contínuo operando com circuito de óleo térmico

Abstract

In order to diversify the energy matrix, studies on solar energy have been increasingly more exploited. The increase in consumption of drinking water combined with the water crisis the need for new water treatment technologies has arisen. Common the solar thermal desalinator as an alternative to drinking water. In isolated regions that may not have adequate infrastructure, such equipment could be the solution when it comes to drinking water. Based on what has been said, This study aimed to perform an initial analysis, in one test, of the best configuration and supply form of the prototype operating with thermal oil circuit. O Solar thermal desalination with heat recovery is divided into two units. The unity three solar collectors with flat plate, two of these were manufactured by Arcon Solvane and the other was manufactured in the Solar and Gas Energy Laboratory Natural (LESGN). The desalination unit is composed of a storage tank of salt or brackish water and seven stages of heat recovery. These stages, by their were composed of polyethylene profiles, desalinated water collection A positive displacement pump was used to move the (Dowtherm A) through the system piping. This oil was heated in the solar collectors and transported to the storage tank, where it passes through the installed inside the tank, evaporating the stored water. This condensed, upon entering the bottom of the upper stage tray and slid into the where they were stored in containers. The heat lost by condensation water from the next stage and the process happened again. To evaluate the production of prototype were calculated performance parameters, COP (Performance Coefficient) and the GOR (Output Gain Ratio) of each setting. In this preliminary analysis, the with supply every two days proved to be more efficient with a total production of 33 liters of desalted water while the continuous supply arrangement produced 22.54 liter.