Scientific journal

63 2024

Journal of Food and Nutrition Research
Summary No. 1 / 2024

Bardavelidze, A. – Bardavelidze, Kh. – Sesikashvili, O.
Development and study of a multi-criteria optimal control algorithm for the static mode of the fruit tunnel dehydration process
Journal of Food and Nutrition Research, 63, 2024, No. 1, s. 69-78

Otari Sesikashvili, Department of Mechanical Engineering, Faculty of Engineering – Technical, Akaki Tsereteli State University, 59 Tamar Mepe Str., 4600 Kutaisi, Georgia. E-mail:

Original article
Received 1 September 2023; 1st revised 1 November 2023; accepted 2 November 2023; published online 27 February 2024.

Summary: In the study, based on the analysis of the technological process of drying apricots on a tunnel-type drying machine, the governing parameters and the control parameters at the exit of dehydrator as well as disturbing factors were determined. Fruit and air control parameters at the outlet of the tunnel-type drying chamber were determined as the final value of the state vector components, the solution of the system of non-linear ordinary differential equations with distributed parameters, describing the static mode of the drying process. With respect to assessing the quality of drying process control, the requirements of minimum energy consumption during drying, achieving maximum productivity and maintaining the desired value of the residual moisture content of the product were used. In order to reach a compromise between these requirements, a Pareto-optimal solution of the problem was proposed, for which a linear fold of the first and second criteria was introduced and the dependence of the minimum value of a new criterion on the fold parameter was considered. Based on the analysis of the results, approximately 5 % reduction in energy consumption with a significant increase in the quality of the dried fruits could be achieved.

Keywords: tunnel dehydrator; fruit; optimal control; static mode; Pareto-optimal solution; energy minimization; maximum productivity

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