Use of Water-TiO2 Nanofluid in Horizontal Slinky Collector of Heat Pump

: pp. 7 – 14
Received: April 11, 2022
Revised: May 06, 2022
Accepted: May 16, 2022

T. Rymar. Use of water-TiO2 nanofluid in horizontal slinky collector of heat pump. Energy Engineering and Control Systems, 2022, Vol. 8, No. 1, pp. 7 – 14.

Lviv Polytechnic National University

The hydrodynamics of water-TiO2 nanofluid in the Ø32×3 mm horizontal Slinky collector of the heat pump, as well as the heat transfer from river water to the nanofluid have been studied in the paper. Water-TiO2 nanofluid provides attractive opportunities of the application in the energy industry due to its enhanced thermal properties. The thermal and hydrodynamic characteristics of the heat transfer fluid with spherical TiO2 nanoparticles in the temperature range from 2 to 12.5 °C have been analysed. The numerical studies have been performed within the range of change in the nanoparticles concentration from 0.3 to 1.3 vol. %. The influence of operating temperatures of water-TiO2 nanofluid on the efficiency of the energy system of a self-sufficient house, in particular, during the heating and non-heating seasons of the heating system operation for Kyiv region has been studied. The paper provides recommendations and confirms that the limitation of the practical use of water-TiO2 nanofluid is the increase in the viscosity of the heat transfer fluid, accompanied by the increase in power for its transportation. The calculated dependencies of the performance efficiency coefficient of water-TiO2 nanofluid application in the energy system on the content of nanoparticles in the heat transfer fluid have been obtained.

  1. Rymar, T., Kazmiruk, M. and Shyika I. (2021) The Efficiency of Nanofluid Use in the Heat Supply System of a House with a Geothermal Heat Pump. 2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP),
  2. Mahian O., Kianifar A., Kalogirou S. A., Pop I., Wongwises S. (2013) A review of the applications of nanofluids in solar energy, International Journal of Heat and Mass Transfer, 57, Issue 2, рр. 582-594,
  3. Olabi A. G., Elsaid K., Sayed E. T., Mahmoud M. S., Wilberforce T., Hassiba R. J., Abdelkareem M. A. (2021) Application of nanofluids for enhanced waste heat recovery: A review. Nano Energy, 84, art. no. 105871,
  4. Mahian O, et al. (2019) Recent advances in modeling and simulation of nanofluid flows – part II: applications. Phys Rep.; 791: pp.1 – 59.
  5. Murshed, S. M. S., Leong, K. C., Yang, C. (2005) Enhanced thermal conductivity of TiO2 - Water based nanofluids  International Journal of Thermal Sciences, 44 (4), pp. 367 - 373,
  6. Choi, S. U. S. (1995). Enhancing Thermal Conductivity of Fluids with Nanoparticles. In Developments and Applications of Non-Newtonian Flows, Edited by: Singer, D. A. and Wang, H. P. vol. FED 231, pp. 99 – 105. New York: American Society of Mechanical Engineers.
  7. Loddo, V., Roda, G. C. (2021) 8 - Heat transfer by using TiO2 nanofluids, In Metal Oxides, Titanium Dioxide (TiO₂) and Its Applications, Elsevier, pp. 267-307. DOI:
  8. Lee, J. H, et al. (2008). Effective viscosities and thermal conductivities of aqueous nanofluids containing low volume concentrations of Al2O3 nanoparticles. Int J Heat Mass Transf.; 51: 2651 – 6.
  9. Bock Choon Pak & Young I. Cho (1998) Hydrodynamic and Heat Transfer Study of Dispersed Fluids With Submicron Metallic Oxide Perticles, Experimental Heat Transfer, 11:2, pp. 151 – 170,
  10. Vasylenko, S. M., Ukrainets, A. I., Olishevsky, V. V. (2004) Basics of heat and mass transfer: Textbook / By ed. acad. UAAS Gulogyi I.S.. - К: NUKHT. – 250 p. (in Ukrainian)
  11. Tsurkan, O. V., Herasymov, O. O., Rymar, T. I. et. al. (2014). Hydrodynamics of the process of filtration dehydration of freshly cleaned pumpkin seeds with vibration activation. Vibrations in engineering and technology, 2 (74), pp. 138 – 144. (in Ukrainian)