THERMAL SCIENCE

International Scientific Journal

Cemil Yigit

,

Ahmet Aydin

,

Halit Yaşar

,

Fatih Isik

,

Tahsin Engin

NUMERICAL INVESTIGATION OF VAPOR PHASE DRZING PROCESS FOR DRYING OF TRANSFORMER’S INSULATION PAPER

ABSTRACT
The moisture content of oil-filled transformers insulation paper that is a cellulose-containing material comprises 8% to 10% of moisture by weight at ambient temperature and it is highly important to decrease the moisture content for effective use of a transformer. Vapor phase drying is more effective method for drying the insulation paper of the transformer as compared with other conventional methods due to less cycle time and energy consumption. The purpose of this paper is to design a solvent operated drying chamber in which drying of the insulation paper of oil filled transformer carried out. The approach of the present paper is to develop a numerical model to reduce the cycle time of the drying process. The unsteady flow, heat, and mass transfer phenomena were simulated by using CFD solver. Theoretical studies and a numerical model were conducted over thermal calculation in the drying process using solvent at different pressures. Theoretical calculations were used to validate the numerical model. Drying chamber was optimized by using response surface methodology. The result of the study showed that drying cycle time was decreased almost 14.3% with the new design. Furthermore, when the solvent was used instead of air as a heat carrier, the drying cycle time was reduced.
KEYWORDS
vapor phase drying, transformers, computational fluid dynamics
PAPER SUBMITTED: 2018-09-28
PAPER REVISED: 2019-02-15
PAPER ACCEPTED: 2019-03-05
PUBLISHED ONLINE: 2019-04-07
DOI REFERENCE: https://doi.org/10.2298/TSCI180928104Y
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2020, VOLUME 24, ISSUE Issue 3, PAGES [2125 - 2135]
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Numerical investigation of vapor phase drzing process for drying of transformer’s insulation paper

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence