关键词: 太阳能, 干燥设备, 对流干燥, 能量衡算, 干燥效率, 干燥模型

Abstract:

The natural convective drying of Ganshimei（intermediate moisture salted plum） was performed using the self-designed small-size solar drying equipment,and the corresponding experimental parameters were detected.Then,the material and energy consumption of the drying system were calculated.Finally,a mathematical model describing the natural convective drying was put forward by changing the effective solar radiant energy per unit.The results show that the natural convective drying using the designed equipment,whose drying efficiency is 61.60%,is of a time cost of 14h,which is only 28.0% of that of the traditional sun drying;and that the proposed model accords well with the experimental results,with a relative deviation being less than 1%.This paper provides the theoretical basis for the application of solar drying equipment and for the quality prediction and drying condition control of Cantonese-style preserved fruits.

Key words: solar energy, drying equipment, convective drying, energy-balancing calculation, drying efficiency, drying model