Vibrations in engineering and technology

Tsurkan Oleh – D.Eng.Sc., professor of the Department of technological processes and equipment of processing and food industries of Faculty of Engineering and Technology of Vinnytsia National Agrarian University, director of Separated structural unit «Ladyzhyn Professional College of Vinnytsia National Agrarian University» (5, P. Kravchyka St., Ladyzhyn, Vinnytsia region, 24321

Spirin Anatoly - candidate of technical sciences, associate professor, teacher of Separate structural subdivision «Ladyzhyn vocational college of Vinnytsia National Agrarian University» (Kravchik Petro St., 5, Ladyzhyn, Vinnytsia Region, Ukraine, 24321, e-mail: spirinanatoly16@gmail.com.

Didyk Andrii – postgraduate student of the Department of Engineering Mechanics and Technological Processes in the Agro-Industrial Complex of the Faculty of Engineering and Technology of Vinnytsia National Agrarian University (3 Sunny Street, Vinnytsia, 21008, Ukraine, +380972830537, anddidyk99@gmail.com, https://orcid.org/0000-0002-0524-0017)

Rutkevych Volodymyr – Candidate of Technical Sciences, Senior Lecturer of Department of machines and equipment of agricultural production of Vinnytsia National Agrarian University (St. Soniachna, 1, Vinnytsia, Ukraine, 21008, e-mail: luts@vsau.vin.ua). ORCID 0000-0002-6366-7772).

The influence of the main operating parameters of a convective-vibratory dryer on the heat transfer coefficient is considered in order to intensify heat and mass transfer and increase the energy efficiency of the walnut drying process. It was established that the dominant factors determining the intensity of heat and mass transfer are the speed and temperature of the drying agent, the geometric structure of the material layer, as well as the parameters of the vibration effect, in particular the amplitude and frequency of oscillations. The use of vibration effect allows you to create a fluidized state of the nut layer, reduce aerodynamic resistance, increase air flow turbulence and increase the heat transfer coefficient up to 1.5 times compared to traditional convective drying. The developed methodology for determining the heat transfer coefficient and specific energy consumption taking into account variable temperatures, humidity and vibration effect parameters allows you to objectively assess the efficiency of the process and form scientifically based recommendations for optimizing operating parameters.

Prospects for further research are indicated, which include studying the influence of different vibration modes on air flow turbulence, the formation of local vortices in the material layer, the development of mathematical models of the process taking into account the interaction of individual elements and the variable geometry of nuts, scaling the results to industrial installations and developing recommendations for optimizing the drying process with increased productivity and maintaining product quality.

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