Vodice The Imperial Park Hotel 26 - 28 March 2025
27 th International Conference on Heating, Cooling and Air-conditioning
ABSTRACT
PAPER
Nikola BOROVNIK, mag. ing. mech. University of Zagreb Faculty of Mechanical Engineering and Naval Architecture Ulica Ivana Lučića 5 10 000 Zagreb Croatia e-mail: nikola.borovnik@fsb.unizg.hr
MP4
PRESENTATION VIDEO
He graduated from the graduate study program in mechanical engineering at the Faculty of Mechanical Engineer- ing and Naval Architecture of University of Zagreb (FSB) in 2020. Today, he is an assistant at the FSB's Chair of Technical Thermodynamics of the Department of Thermodynamics, Thermal and Process Engineering.
doc. dr. sc. Saša MUDRINIĆ University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, Croatia izv. prof. dr. sc. Nenad FERDELJI University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, Croatia
MULTISCALE MODELLING OF HEAT TRANSFER INSIDE THE VACUUM CHAMBER FOR TRANSFORMER DRYING PROCESS
The vacuum drying process is an essential phase in transformer production due to the low final moisture content requirement for cellulose insu- lation. This process involves moisture extraction through vacuum and heat application. Since the drying rate is significantly influenced by the boundary conditions at the interface between the insulation and the surrounding atmosphere, prop- erly defining these boundary conditions should
require simulating both heat and mass transfer within the oven. This simulation should include convection and radiation heat transfer between the insulation, chamber walls, and heating sur- faces, as well as the pump down and venting pro- cesses. This work presents a mathematical model and corresponding simulation that considers all these factors.
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3rd Thematic Section - ENERGY EFFICIENCY AND RENEWABLES
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