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Stream/Area:
-
Subject:
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Paper ID:
IJSREM63249
Volume:
10 |
5 |
May 2026
Pages:
1-5
Publication Frequency:
Monthly (12 issues per year)
License:International Journal of Scientific Research in Engineering and Management follows the Creative Commons Attribution 4.0 (CC BY 4.0) License, allowing free use and distribution with proper attribution.
Mechanical Engineering
ISBM College of Engineering, Nande,Pune
Mechanical Engineering
ISBM College of Engineering, Nande,Pune
Mechanical Engineering
ISBM College of Engineering, Nande,Pune
Mechanical Engineering
ISBM College of Engineering, Nande,Pune
Mechanical Engineering
ISBM College of Engineering, Nande,Pune
Mechanical Engineering
ISBM College of Engineering, Nande,Pune
To measure convective heat transfer and hydraulic penalty of a straight circular tube heat exchanger equipped with twisted-tape inserts and run using the Al2O3 water nanofluids, an experimental study was carried out. Reynolds numbers between 500 and 15,000 with three twist ratios (y/w = 3.0, 4.5, 6.0) and nanoparticle volume concentrations of 0.1 to 0.5 percent by volume were tested. Nusselt number and friction factor were measured and compared to plain tube with pure water. A combination of the twisted-tape inserts and nanofluids resulted in a synergistic rise in heat transfer at a penalty of a quantifiable pressure-drop. Net benefit was measured by thermal performance factor η, assuming constant pumping-power. It was found that the optimum improvement can be achieved at low twist ratios and moderate nanoparticle concentration where 2 indicates net system-level advantage. Significant implications to the design of compact heat exchanger are discussed.
KEYWORDS
In the case of using a combination of twisted-tape inserts along with Al 2 O 3 -water nanofluid, the convective heat transfer increases tremendously in comparison to a simple plain tube using water. The highest gains in the Nusselt number were realized at tight twist ratios (y/w = 3.0) and also with increased nanoparticle concentrations up to approximately 2.38 times the plain tube at Re = 8000. The penalties based on friction factors cannot be overlooked and should be taken into account; the optimal integrated case yielded eta = about 1.58, which means that the net performance of the chosen operating points is favourable. Recommendations: To implement in practice prefer geometry and concentration that maximise η at the desired Re range; test long-term stability of nanoflids and adopt filtration or treatment to control possible agglomeration of particles.
Khargotra, R., Sharma, V., and Kumar, R. (2023). An overview of various twisted tape designs in heat exchangers. Scientific Reports. https://pmc.ncbi.nlm.nih.gov/articles/PMC10238699/ Murthy, H. M. S. (2019). Impact on performance of a circular tube heat exchanger with the application of twisted tapes and nanofluids. Sādhanā, 49(205). https://www.ias.ac.in/public/Volumes/sadh/049/00/0205.pdf Prasad, P. V. D., Gupta, A. V. S. S. K. S., & Sundar, L. S. (2015). Heat transfer and friction factor of Al2O3 nanofluid with helical tape inserts experimental. Experimental Thermal and Fluid Science, 62, 141 150. https://www.sciencedirect.com/science/article/abs/pii/S0894177714003094 Sridhara, V., & Satapathy, L. N. (2011). Nanofluids based on Al 2 O 3: A review. Nanoscale Research Letters, 6, 456. https://pmc.ncbi.nlm.nih.gov/articles/PMC3211876/ Ju, Y., Zhang, H., & Li, X. (2021). Assessment of various semi-twisted tape inserts in a heat exchanger by Al 2 O 3/ water nanofluid. Nanomaterials, 11(6), 1570. https://www.mdpi.com/2079-4991/11/6/1570
Publication Date
5/15/2026
Peer Review Type
Double-Blind Peer Review
Review Rounds: 2
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