THERMAL SCIENCE

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Burhan Bayhan

,

Gökhan Arslan

THEORETICAL MODEL OF NATURAL CIRCULATION FLOW AND HEAT TRANSFER WITHIN ONE-ENDED INCLINED PIPE

ABSTRACT
The most commonplace natural flow inside one-ended inclined pipes today is water heating systems. In this study, a model was created for the estimation of the pipe outlet temperature of the fluid with the energy balance for the inside of the tank, flow rate calculation of natural circulation, and other thermal calculations in a one-ended inclined pipe. In addition, this model has been compared with the Li model in the literature, and it is easier and more successful. 100 W, 200 W, 400 W, 600 W, and 800 W thermal power was applied to a one-ended inclined pipe, and the temperature values were recorded in five minute periods in the experiments that lasted a total of six hours. As the average of the experiments, the estimation results for the current model and the Li model are: the average per-cent relative error rates are 6.02 and 15.1 and the coefficient of determination, R2, are 0.9865 and 0.9683, respectively.
KEYWORDS
natural flow, temperature prediction, one-ended inclined pipe flow
PAPER SUBMITTED: 2022-04-02
PAPER REVISED: 2022-04-28
PAPER ACCEPTED: 2022-04-30
PUBLISHED ONLINE: 2022-07-09
DOI REFERENCE: https://doi.org/10.2298/TSCI220402100B
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 6, PAGES [5187 - 5198]
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Theoretical model of natural circulation flow and heat transfer within one-ended inclined pipe

© 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