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Nanofluids are basically nano sized solid particles which can be either metallic or nonmetallic, suspended in a base fluid such as water, ethylene glycol etc. The nanofluids are generally sought to be much better working fluids as compared to the base fluids because of their enhanced thermal properties. In this research, nanofluids such as Al2O3-H2O, TiO2-H2O and ZrO2-H2O were analyzed and compared on the basis of thermal parameters such as overall heat transfer coefficient and Nusselt number. The basis of comparison was suspending these nanoparticles at various concentrations of 0.4 %, 0.8 % and 1.2 % volume by weight and at various Reynolds number ranging from 4000 to 20000. For investigation an experimental setup was modeled with the help of CFD which involved a tube in tube heat exchanger. A helical wire coil turbulator of 39 mm pitch was used to promote the turbulence in flow in the inner tube. The results were drawn and compared with that of pure water which involved the case of with and without turbulator. The investigation showed the overall heat transfer coefficient and the average Nusselt number increased with the increase in the Reynolds number as well as the particle concentrations. Moreover out of the three nanofluids, the TiO2-H2O nanofluid exhibited better heat transfer capabilities. Also the use of turbulators caused the swirl motion in the flow which enhanced the heat transfer coefficient.
Keywords:
Heat exchanger, turbulators, Nano fluids, Heat transfer coefficient, Nusselt number
Cite Article:
"ANALYSIS OF VARIOUS NANO FLUIDS IN CONCENTRIC TUBE HEAT EXCHANGER WITH TURBULATOR USING CFD", International Journal of Science & Engineering Development Research (www.ijrti.org), ISSN:2455-2631, Vol.3, Issue 7, page no.156 - 166, July-2018, Available :http://www.ijrti.org/papers/IJRTI1807025.pdf
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ISSN:
2456-3315 | IMPACT FACTOR: 8.14 Calculated By Google Scholar| ESTD YEAR: 2016
An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 8.14 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator