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Preliminary Results of Heat Transfer and Pressure Drop Measurements on Al 2 O 3 /H 2 O Nanofluids through a Lattice Channel

Author

Listed:
  • Sandra Corasaniti

    (Department of Industrial Engineering, University of Rome “Tor Vergata”, Via del Politecnico 1, 00133 Rome, Italy)

  • Michele Potenza

    (Department of Industrial Engineering, University of Rome “Tor Vergata”, Via del Politecnico 1, 00133 Rome, Italy)

  • Ivano Petracci

    (Department of Industrial Engineering, University of Rome “Tor Vergata”, Via del Politecnico 1, 00133 Rome, Italy)

Abstract

A nanofluid is composed of a base fluid with a suspension of nanoparticles that improve the base fluid’s thermophysical properties. In this work, the authors have conducted experimental tests on an alumina-based nanofluid ( Al 2 O 3 /H 2 O ) moving inside a 3D-printed lattice channel. The unit cell’s lattice shape can be considered a double X or a double pyramidal truss with a common vertex. The test channel is 80 mm long and has a cross-sectional area, without an internal lattice with that has the dimensions H × W , with H = 5 mm and W = 15 mm. A nanofluid and a lattice duct can represent a good compound technique for enhancing heat transfer. The channel is heated by an electrical resistance wound onto its outer surface. The heat transfer rate absorbed by the nanofluid, the convective heat transfer coefficients, and the pressure drops are evaluated. The experimental tests are carried out at various volumetric contents of nanoparticles ( φ = 1.00%, φ = 1.50% and φ = 2.05%) and at various volumetric flow rates (from 0.2 L/min to 2 L/min). The preliminary results show that in the range between 0.5 L/min ÷ 2.0 L/min, the values of convective heat transfer coefficients are greater than those of pure water ( φ = 0) for all concentrations of Al 2 O 3 ; thus, the nanofluid absorbed a higher thermal power than the water, with an average increase of 6%, 9%, and 14% for 1.00%, 1.50% and 2.05% volume concentrations, respectively. The pressure drops are not very different from those of water; therefore, the use of nanofluids also increased the cooling efficiency of the system.

Suggested Citation

  • Sandra Corasaniti & Michele Potenza & Ivano Petracci, 2023. "Preliminary Results of Heat Transfer and Pressure Drop Measurements on Al 2 O 3 /H 2 O Nanofluids through a Lattice Channel," Energies, MDPI, vol. 16(9), pages 1-20, April.
  • Handle: RePEc:gam:jeners:v:16:y:2023:i:9:p:3835-:d:1136645
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    References listed on IDEAS

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    4. Xiaoxin Zeng & Hao Yu & Tianbiao He & Ning Mao, 2022. "A Numerical Study on Heat Transfer Characteristics of a Novel Rectangular Grooved Microchannel with Al 2 O 3 /Water Nanofluids," Energies, MDPI, vol. 15(19), pages 1-18, September.
    5. Janusz T. Cieśliński & Dawid Lubocki & Slawomir Smolen, 2022. "Impact of Temperature and Nanoparticle Concentration on Turbulent Forced Convective Heat Transfer of Nanofluids," Energies, MDPI, vol. 15(20), pages 1-22, October.
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