The Non-Stationary Heat Transport inside a Shafted Screw Conveyor Filled with Homogeneous Biomass Heated Electrically

Stanisław Ledakowicz () and Olexa Piddubniak
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Stanisław Ledakowicz: Faculty of Process and Environmental Engineering, Lodz University of Technology, Wolczanska Str. 215, 90-924 Lodz, Poland
Olexa Piddubniak: Institute of Computer Technologies, Automation and Metrology, Lviv Polytechnic National University, Kniazia Romana Str. 1/3, 79005 Lviv, Ukraine

Energies, 2022, vol. 15, issue 17, 1-16

Abstract: The non-stationary heat transfer inside a cylindrical channel of a shafted screw conveyor, electrically heated, and filled with a moving biomass was analyzed. The problem of non-stationary heat transport is encountered in the processes of biomass pyrolysis and food products’ sterilization. To solve the heat conduction equation with initial and boundary conditions, the methods of the expansion of the given and unknown functions into a Fourier series in the angular coordinate, and Fourier and Laplace integral transforms in the axial coordinate and time, respectively, were used. As a result of solving this problem, it is shown that the temperature in the reactor consists of two main terms. The first of them is proportional to time, and the second is a superposition of quasi-monochromatic heat pulses decaying with time. Numerical analysis of the temperature distribution in space and time depending on various specific parameters of the system was carried out. The obtained numerical results were compared with those corresponding to the cases of heat sources in the form of a spiral or a shaftless helical screw.

Keywords: auger reactor; shafted helical screw equipment; electric heating; non-stationary temperature field; mathematical modelling; numerical analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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