STUDY ON THE DRYING CONDITION OPTIMIZATION OF THE HEATING PUMP AND THE INFRARED RADIATION FOR THE TRICHOGASTER PESTORALIS

Abstract

The paper focused on the drying condition of the infrared radiation combining the heat pump for the silver jewfish basing on the level 1 multi-factor experimental planning model of Box-Wilson. The results showed the mathematical model (Y= 7.11 – 0.05X1 -0.49X2 + 0.75X3- 0.7 X1X2 – 0.8 X1X3+ 0.07X2X3) that expressed the relationship between the drying time (Y) and the impact factors (the sorbitol concentration (X1), the drying temperature (X2), and the wind speed (X3), in which the the wind speed (X3) affected the drying time stronger than other factors. The optimization condition of drying was the sorbitol concentration of 10,6%, the drying temperature at 530C, the wind speed of 2.1m/s, and the drying time for 7.57 hours. Dried silver jewfish at the optimum condition got the sensory quality, food hygiene, and safety higher than the air drying and sun drying methods. The results are a scientific basis for completing the technology and widely deploying the drying method in production.