Modeling of Newtonian and non-Newtonian-based coolants for deployment in industrial length-scale shell and tube heat exchanger

S. Anitha (), Tiju Thomas, V. Parthiban () and M. Pichumani
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S. Anitha: Department of Nanoscience and Technology, Sri Ramakrishna Engineering College, Coimbatore, Tamilnadu, India
Tiju Thomas: Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Chennai, Tamilnadu, India3DST Solar Energy Harnessing Center — An Energy Consortium, Indian Institute of Technology, Chennai, Tamilnadu, India
V. Parthiban: School of Advanced Sciences, Vellore Institute of Technology, Chennai, Tamilnadu, India
M. Pichumani: Department of Nanoscience and Technology, Sri Ramakrishna Engineering College, Coimbatore Tamilnadu, India

International Journal of Modern Physics C (IJMPC), 2021, vol. 32, issue 06, 1-24

Abstract: To evaluate the heat transfer performance (HTP) of hybrid nanofluids, numerical simulations are carried out in an industrial length single pass shell and tube heat exchanger. In shell, ISO VG 68 oil enters with 75∘C and with 30∘C, the coolant passes into the tube. CNT-TiO2/water and CNT-TiO2/sodium alginate (SA) are used as Newtonian and non-Newtonian hybrid nanofluid, respectively. The influence of base fluid and nanoparticles on thermal performance of heat exchanger is studied. The chosen nanoparticles are reliable to the industrial deployment. The current numerical procedure is validated with the earlier experimental results. Volume fraction of nanoparticles is optimized for an effective HTP of the heat exchanger. About 60% increment in heat transfer coefficient is observed when hybrid nanofluid is employed. By using Newtonian hybrid nanofluid, 50% improvement in Nusselt number is marked out. Effectiveness and heat transfer rate of heat exchanger are higher with the employment of Newtonian hybrid nanofluid. Results indicated that, even though Newtonian hybrid nanofluid shows higher thermal performance, non-Newtonian hybrid nanofluid is preferable for energy consumption point of view.

Keywords: Heat transfer performance; hybrid nanofluid; thermophysical properties; Nusselt number; carbon Nanotubes; CFD numerical simulation (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0129183121500856

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