Experimental study on the main parameters determination for Gac fruit aril on the heat pump dryer
The paper presents the results of experimental research to determine the technological parameters of
Gac fruit aril drying process in the heat pump dryer. The experiments were carried out according to the 2-level
orthogonal experimental plan, combined with multiple response optimization according to Response Surface
method (RSM) to determine the optimal parameters (Temperature of air drying, temperature of moisture
condensation, air velocity) in the Gac aril drying process. As the result, the optimal parameters were determined
such as: Temperature of air drying was tgopt = 44.16C, temperature of moisture condensation tfopt = 14.03C, air
velocity was Vgopt = 2.6 m/s. Corresponding to these optimal parameters, the objective functions reached the
minimum value, including the drying time min = 11.27 hours, the specific energy consumption Nemin = 4.363
kWh/kg vapor and the loss of beta-carotene in Gac aril of the finished product Bmin = 4.394%
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