Estudio del proceso de secado de fresa usando horno microondas /
Study of the stramberry drying process using microwave dryer /
María Bernarda. Alvarado Bawab
- 29-39 páginas : ilustraciones.
RESUMEN: El objetivo de esta investigación es evaluar el proceso y rendimiento de secado en horno microondas de 10kW de potencia a 2,45GHz empleando fresa para los experimentos. El contenido de humedad de las muestras de fresa es alrededor del 90% y se logró remover un 85% del peso de esta durante el proceso, asumiendo que los demas compuestos de la fresa no varian. Para el experimento se midió la perdida de peso, la temperatura, el consumo energético y las condiciones ambientales de temperatura y humedad relativa. Se encontró que se pueden alcanzar rendimientos de 0,45kg/kWh durante los primeros 15 minutos de proeso alcanzando temperaturas alrededor de los 335K y removiendo el 60% de la humedad contenida. ABSTRACT: This research evaluated the drying process and performance in a microwave oven with 10kW of power at 2,45GHz using strawberry for experiments. The oven consists of four units composed of 4 magnetrons each that turn on and off in an automated way to maintain the desired power in the drying chamber; in each one of the experiments was processed 1kg of sample placed on an aluminum tray. during the process the weight loss, the real-time temperature was measured with five infrared thermometers installed inside the drying chamber, the energy consumption and the environmental conditions of temperature and relative humidity. The treated samples had a moisture content of about 90% and it was possible to remove 85% of the weight during the process, assuming that the other strawberry compounds did not vary. It was found that yields of 0.45 kg/kWh can be achieved during the first 15 minutes of processing reaching temperatures around 335K and removing 60% of the contained moisture.