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Enhanced heat transfer performance of silver Nanofluids as coolants in a helical Shell and tube heat exchanger: an experimental study

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Abstract

Silver nanofluids have recently emerged as a promising coolant for enhancing heat transfer performance. This study experimentally investigates the heat transfer characteristics of silver nanofluid in a helical shell and tube heat exchanger. Spherical silver nanoparticles of 143 nm mean diameter were synthesized using a chemical reduction method and characterized comprehensively. The nanofluid was utilized as the tube-side coolant at volumetric concentrations of 1.5% and 2.5%, with its effectiveness compared to water. The impacts of concentration and fluid flow rate on heat transfer coefficient and effectiveness were evaluated under varying conditions. Results showed improved heat transfer performance using silver nanofluid, with the maximum enhancement at 2.5% concentration. The heat transfer coefficient and effectiveness increased with higher flow rate, demonstrating the importance of optimizing fluid flow conditions. This study provides new insights into harnessing silver nanofluids for thermal engineering applications and quantifies the effects of concentration and flow on the viability of silver nanofluids as efficient coolants in heat exchangers.

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Data availability

The data supporting the findings of this study are not publicly available due to confidentiality reasons.

Abbreviations

AgNF:

Silver nanofluid

3D:

Three-dimensional

PVP:

Polivinilpirrolidona

2D:

Two-dimensional

RPSL:

Localized Surface Plasmon Resonance

UV:

Ultraviolet

CPU:

Central Processing Unit

NFA:

Nanofluid with the volumetric concentration of 1.5%

NFB:

Nanofluid with the volumetric concentration of 2.5%

MTH:

Microtube helicoidal

EES:

Engineering Equation Solver

pH:

Potential of hydrogen

HE:

Heat exchanger

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Authors and Affiliations

  1. Department of Mechanical Engineering, Annamacharya Institute of Technology and Sciences (Autonomous), Rajampet, Andhra Pradesh, 516126, India

    B. Devaraj Naik

  2. Department of Mechanical Engineering, Annapoorana Engineering College, Salem, Tamil Nadu, India

    Sivakumar Jaganathan & Silambarasan Rajendran

  3. Department of Mechanical Engineering, Panimalar Engineering College, Nazarathpettai, Chennai, 600123, India

    Srinivas Jayaraman

  4. Department of Mechanical Engineering, Rajalakshmi Institute of Technology, Poonamallee, Chennai, 600124, India

    G. Muthu

  5. Department of Mechanical Engineering, Aksum University, Aksum, Ethiopia

    Ratchagaraja Dhairiyasamy

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  1. B. Devaraj Naik
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  2. Sivakumar Jaganathan
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  3. Srinivas Jayaraman
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  4. G. Muthu
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  5. Ratchagaraja Dhairiyasamy
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  6. Silambarasan Rajendran
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Correspondence to Silambarasan Rajendran.

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Naik, B.D., Jaganathan, S., Jayaraman, S. et al. Enhanced heat transfer performance of silver Nanofluids as coolants in a helical Shell and tube heat exchanger: an experimental study. Heat Mass Transfer 60, 463–477 (2024). https://doi.org/10.1007/s00231-023-03444-x

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  • DOI: https://doi.org/10.1007/s00231-023-03444-x

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