What does this research mean for the field?

Non-Newtonian nanofluids, particularly CuO, significantly enhance heat transfer performance in shell-and-helical-coil heat exchangers, but simultaneously increase thermodynamic exergy loss at higher flow rates, necessitating operational optimization. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate the heat transfer enhancement, thermal performance, and thermodynamic irreversibility of a shell-and-helical-coil heat exchanger utilizing non-Newtonian nanofluids.

September 2, 2026Journal of Thermal Science and Engineering Applications

Thermal Performance, Exergy, and NTU Analysis of a Shell and Helical Coil Heat Exchanger using non-Newtonian Nanofluids

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Authors

AVA. Venu VinodNational Institute of Technology Warangal BNB. Anil Kumar NaikNational Institute of Technology Patna

Discussion

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Overview

Experimental study demonstrates enhanced heat transfer and increased exergy loss using non-Newtonian nanofluids in a helical coil exchanger, highlighting the necessity of system optimization.

Key Points

To evaluate the heat transfer enhancement, thermal performance, and thermodynamic irreversibility of a shell-and-helical-coil heat exchanger utilizing non-Newtonian nanofluids.
Tested Al2O3, CuO, and Fe2O3 nanoparticles dispersed in 0.5 wt.% carboxymethyl cellulose base fluid as the shell-side fluid under varying temperatures (40–60°C) and stirring speeds (500–1500 rpm).
Circulated coil-side water at 27°C across varied flow rates corresponding to distinct Dean numbers.
Evaluated system performance through the Number of Transfer Units (NTU) approach and thermodynamic exergy analysis.
Number of Transfer Units (NTU) increased with higher nanoparticle concentration and shell-side fluid temperature due to elevated thermal conductivity and convective heat transfer.
Exergy loss increased alongside rising Dean numbers and temperature differentials due to higher entropy generation, exhibiting an inverse relationship with NTU relative to flow rate.
CuO nanofluid achieved the highest thermal performance among tested materials, outperforming Al2O3 and Fe2O3.

Cite This Study

Vinod et al. (2026) studied this question.

synapsesocial.com/papers/6a97e28dc562ede874ec6a64 https://doi.org/10.1115/1.4072665

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September 2, 2026Journal of Thermal Science and Engineering Applications

Thermal Performance, Exergy, and NTU Analysis of a Shell and Helical Coil Heat Exchanger using non-Newtonian Nanofluids

View Full Paper

Ask AI

Bookmark

Authors

AVA. Venu VinodNational Institute of Technology Warangal BNB. Anil Kumar NaikNational Institute of Technology Patna

Discussion

Member takes

Overview

Experimental study demonstrates enhanced heat transfer and increased exergy loss using non-Newtonian nanofluids in a helical coil exchanger, highlighting the necessity of system optimization.

Key Points

To evaluate the heat transfer enhancement, thermal performance, and thermodynamic irreversibility of a shell-and-helical-coil heat exchanger utilizing non-Newtonian nanofluids.
Tested Al2O3, CuO, and Fe2O3 nanoparticles dispersed in 0.5 wt.% carboxymethyl cellulose base fluid as the shell-side fluid under varying temperatures (40–60°C) and stirring speeds (500–1500 rpm).
Circulated coil-side water at 27°C across varied flow rates corresponding to distinct Dean numbers.
Evaluated system performance through the Number of Transfer Units (NTU) approach and thermodynamic exergy analysis.
Number of Transfer Units (NTU) increased with higher nanoparticle concentration and shell-side fluid temperature due to elevated thermal conductivity and convective heat transfer.
Exergy loss increased alongside rising Dean numbers and temperature differentials due to higher entropy generation, exhibiting an inverse relationship with NTU relative to flow rate.
CuO nanofluid achieved the highest thermal performance among tested materials, outperforming Al2O3 and Fe2O3.

Cite This Study

Vinod et al. (2026) studied this question.

synapsesocial.com/papers/6a97e28dc562ede874ec6a64 https://doi.org/10.1115/1.4072665

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