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Experimental study of nanofluid heat transfer for geothermal applications

Author

Listed:
  • Pisarevsky, M.I.
  • Struchalin, P.G.
  • Balakin, B.V.
  • Kutsenko, K.V.
  • Maslov, Y.A.

Abstract

The paper presents a performance study of a lab-scale geothermal coaxial heat exchanger with an aqueous nanofluid with the nanoparticles of Al2O3. The concentration of nanoparticles was in the interval 2% wt. to 8% wt. We describe the nanofluid production method resulting in samples that are stable in static conditions for 50 days. The average size of the particles was 183 nm in−situ. We found that the thermal conductivity of the nanofluid may increase up to 13%, and the maximum apparent viscosity grows to 20% relative to the base fluid. The nanofluid was tested in a lab-scale geothermal heat exchanger. The best thermal performance of the heat exchanger with nanofluid was 9% higher than for the experiments with the base fluid.

Suggested Citation

  • Pisarevsky, M.I. & Struchalin, P.G. & Balakin, B.V. & Kutsenko, K.V. & Maslov, Y.A., 2024. "Experimental study of nanofluid heat transfer for geothermal applications," Renewable Energy, Elsevier, vol. 221(C).
  • Handle: RePEc:eee:renene:v:221:y:2024:i:c:s096014812301546x
    DOI: 10.1016/j.renene.2023.119631
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