Combined Effect of Temperature and Air Velocity on Low-Temperature Drying of Apple Assited by Power Ultrasound

Autores UPV
Año
CONGRESO Combined Effect of Temperature and Air Velocity on Low-Temperature Drying of Apple Assited by Power Ultrasound

Abstract

Drying kinetics of apple cubes (side 8.8 mm) were experimentally determined at -10, 0 and 10ºC and 1, 2, 4 and 6 ms-1, without (AIR) and with (AIR+US) power ultrasound application (20.5 kWm-3, 21.9 kHz). The experimental results obtained showed that air velocity, temperature and US application affected the drying process in different way. Thus, the increase of air temperature reduced the drying time while a small effect of the air velocity was observed. Regarding the application of power ultrasound, it reduced the drying times for all temperatures and air velocities tested shortening the drying time up to 80%. Significant interactions between the three factors (velocity, temperature and power ultrasound) were found