| Issue |
MATEC Web Conf.
Volume 192, 2018
The 4th International Conference on Engineering, Applied Sciences and Technology (ICEAST 2018) “Exploring Innovative Solutions for Smart Society”
|
|
|---|---|---|
| Article Number | 02062 | |
| Number of page(s) | 4 | |
| Section | Track 2: Mechanical, Mechatronics and Civil Engineering | |
| DOI | https://doi.org/10.1051/matecconf/201819202062 | |
| Published online | 14 August 2018 | |
Thermal performance in a tubular heat exchanger with deltawinglets
Mechanical Engineering Dept., Faculty of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, Thailand
*
Corresponding author: kpongjet@gmail.com
The paper presents an experimental heat transfer enhancement study in a tubular heat exchanger fitted with delta-winglets. The experimental work was conducted by varying the airflow rate in the test tube having a constant wall heat-flux for turbulent regime, Reynolds number (Re) from 5200 to 23,000. Effects of three pitch ratios (PR=P/D=1.5, 2.0 and 3.0) and two attack angles, α = 45° and 60°, of the winglets at a single blockage ratio (BR=b/D = 0.15) on thermal characteristics are examined. The experimental results show that the winglet-inserted tube yields, respectively, the heat transfer, friction factor and thermal performance in the form of TEF around 1.99–4.08, 4.9–14.3 times higher than the plain tube and 0.85–1.85, depending on the operating condition.
© The Authors, published by EDP Sciences, 2018
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