THERMAL SCIENCE

International Scientific Journal

Shiquan Zhu

,

Longjiang Li

,

Yisen Peng

,

Chuanxiao Cheng

,

Wenfeng Hu

,

Zongyao Hu

,

Tingxiang Jin

EFFECT OF TRIANGULAR RIBS ON THE FLOW AND HEAT TRANSFER CHARACTERISTICS OF HEAT EXCHANGER TUBE

ABSTRACT
To improve the heat exchange tube’s comprehensive performance and achieve enhanced heat transfer with lower flow resistance. The flow and heat transfer characteristics of a newly enhanced tube with triangular ribs were studied by numerical simulation. The results show that the multi-vortex longitudinal swirl developed in the triangular rib enhanced tube can enhance the cold and hot fluid mixing, and make the temperature distribution in the tube more uniform. The field synergy of velocity and temperature gradient was improved and the heat transfer capacity was enhanced. In the triangular rib enhanced tube, reducing the dimensionless pitch ratio of triangular ribs (P* = 0.5, 0.75, 1, and 1.25) and appropriately increasing the area of triangular ribs (A = 8, 12, 16, and 20 mm2) can improve the performance evaluation criteria (PEC). When Re = 8475, P* = 0.5, and A = 20 mm2, the maximum PEC = 1.324 is obtained.
KEYWORDS
heat exchanger tube, Heat Transfer Enhancement, triangular rib, multi-vortex longitudinal swirl
PAPER SUBMITTED: 2023-01-30
PAPER REVISED: 2023-03-13
PAPER ACCEPTED: 2023-03-15
PUBLISHED ONLINE: 2023-05-13
DOI REFERENCE: https://doi.org/10.2298/TSCI230130098Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 1, PAGES [89 - 100]
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Effect of triangular ribs on the flow and heat transfer characteristics of heat exchanger tube

© 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