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STUDY OF THERMOPHYSICAL PROPERTIES OF AL2O3-EG:WATER NANOFLUID FOR GEOTHERMAL APPLICATION

https://doi.org/10.53360/2788-7995-2025-2(18)-52

Abstract

This work presents the results of experimental investigation of the thermophysical properties of Al₂O₃– EG:water nanofluid for its application in geothermal heat pumps. The experiment was conducted at temperatures ranging from 0 to 10 °C and nanoparticle concentrations of 1, 3, and 5 vol.%. The results showed that at 1% concentration, thermal conductivity increased by 8.2%, at 3% – by 17.4%, and at 5% – by 27%, compared to the base EG:water (60:40) solution. However, at 5% concentration, viscosity increased by 45%, leading to higher hydrodynamic losses. The optimal concentration of 3% increases thermal conductivity by 17.4% while raising viscosity by only 21%, providing a balance between heat transfer efficiency and pumping costs. The calculated performance evaluation criterion (PEC) confirms that the best balance is achieved at 3% Al₂O₃, where PEC = 1.23. Further research should investigate the impact of nanoparticles on corrosion, long-term stability, and interaction with system components. The obtained results may contribute to the development of more efficient heat transfer fluids for geothermal heating and reduction of energy consumption in heat pumps.

About the Authors

A. K. Kusain
Shakarim University
Kazakhstan

Almira Kairbolatkyzy Kusain – Master's student of the 7M07101 «Heat Power Engineering»
educational program, Department of «Technical Physics and Heat Power Engineering»,

071412, Semey, st. Glinka, 20A



A. B. Kassymov
Shakarim University
Kazakhstan

Askar Bagdatovich Kassymov – PhD, Member of the Board – Vice-Rector for Strategy and Social
Development,

071412, Semey, st. Glinka, 20A



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Review

For citations:


Kusain A.K., Kassymov A.B. STUDY OF THERMOPHYSICAL PROPERTIES OF AL2O3-EG:WATER NANOFLUID FOR GEOTHERMAL APPLICATION. Bulletin of Shakarim University. Technical Sciences. 2025;(2(18)):421-426. (In Russ.) https://doi.org/10.53360/2788-7995-2025-2(18)-52

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ISSN 2788-7995 (Print)
ISSN 3006-0524 (Online)
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