Las pruebas aceleradas de corrosión son esenciales para el diseño de estructuras metálicas empleadas en ambientes con altas concentraciones de NaCl. La cámara de niebla salina es un equipo de laboratorio que proporciona una atmosfera corrosiva controlada. En este trabajo se propone el uso de discos piezoeléctricos para la pulverización de la solución, sustituyendo los equipos tradicionales que emplean aire comprimido, lo que reduce el volumen y costo. Para la implementación de los dispositivos propuestos, se ha integrado el uso de sensores, una resistencia calefactora de 250 W y una interfaz con pantallas de cristal líquido para monitorear las variables de interés, incluyendo tres microcontroladores Arduino que son programados para procesar los datos obtenidos. Los resultados experimentales indican que la propuesta permite un control preciso de la humedad y la temperatura con un bajo consumo energético de menos de 25W, además de una producción uniforme de las partículas de aerosol suspendido. Se concluye que la tecnología piezoeléctrica es capaz de sustituir al sistema de compresión de aire, asimismo ofrece una alternativa para pulverizar la solución salina, con una menor potencia y costo.
Drying has been the most widely used fruit preservation process for many years. Food dehydration is a process in which heat transfer and mass transfer take place. The main objective of this research is to share the results obtained in the process of dehydration of seasonal fruits and vegetables of the Tabasco region through a dynamic model using a solar stove, through a controllable indirect heating method, which stabilizes the temperature of dehydration, so that there are no alterations in color and flavor of the fruit. The results in the dehydration of seasonal fruits (mango and cambola) are presented in adequate and homogeneous proportions, distributing each piece in the solar stove, exposed to solar energy for three days. A description of the solar drying used, the instrumentation used and the experimental process that was carried out in each of the tests is briefly shown. Solar energy is used as a good source of heat supply for the dehydration of agricultural products and the use of the solar stove gives another alternative to the use of this renewable and sustainable energy, which is available in Tabasco for drying food products, with the purpose of preserving and giving added value to the fruits of this region
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