THERMAL SCIENCE

International Scientific Journal

Borivoj Lj Stepanov

,

Ivan K. Pešenjanski

,

Momčilo Đ Spasojević

SCANDINAVIAN BAFFLE BOILER DESIGN REVISITED

ABSTRACT
The aim of this paper is to examine whether the use of baffles in a combustion chamber, one of the well-known low-cost methods for the boiler performance improvement, can be enhanced. Modern day tools like computational fluid dynamics were not present at the time when these measures were invented, developed and successfully applied. The objective of this study is to determine the influence of location and length of a baffle in a furnace, for different mass flows, on gas residence time. The numerical simulations have been performed of a simple Scandinavian stove like furnace. The isothermal model is used, while air is used as a medium and turbulence is modeled by realizable k-epsilon model. The Lagrange particle tracking is used for the residence time distribution determination. The statistical analysis yielded the average residence time. The results of the computational fluid dynamics studies for different baffle positions, dimensions and flow rates show from up to 17% decrease to up to 13 % increase of residence time. The conclusion is that vertical position of the baffle is the most important factor, followed by the length of the baffle, while the least important showed to be the mass flow. [Projekat Ministarstva nauke Republike Srbije, br. III 43008: Development of methods, sensors and systems for monitoring of quality of water, air and land]
KEYWORDS
combustion improvement, residence time, baffle, cold flow, computational fluid dynamics
PAPER SUBMITTED: 2013-05-08
PAPER REVISED: 2013-12-03
PAPER ACCEPTED: 2014-06-08
PUBLISHED ONLINE: 2014-06-21
DOI REFERENCE: https://doi.org/10.2298/TSCI130508070S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2015, VOLUME 19, ISSUE Issue 1, PAGES [305 - 316]
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Scandinavian baffle boiler design revisited

© 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