Improvement of thermotechnical properties of refrigerator’s evaporator using nanoparticles

Authors

  • Valery Milowanov V. S. Martynovskyi Educational and Scientific Institute of Cold, Cryotechnologies and Environmental Energy, Odessa National Academy of Food Technologies, 112, Kanatna str., Оdessa, Ukraine, 65039, Ukraine https://orcid.org/0000-0003-0776-5164
  • Dmitriy Balashov V. S. Martynovskyi Educational and Scientific Institute of Cold, Cryotechnologies and Environmental Energy, Odessa National Academy of Food Technologies, 112, Kanatna str., Оdessa, Ukraine, 65039, Ukraine https://orcid.org/0000-0001-9950-2200

DOI:

https://doi.org/10.15587/2312-8372.2019.167453

Keywords:

isobutene refrigerator, nano additive, heat loss and heat transfer coefficients in the evaporator

Abstract

The paper presents information on the prospects for the use of nanoparticles to improve the thermotechnical characteristics of heat exchangers of the refrigerator operating on isobutane. The effect of nano additives is considered on the example of an experimental study of an evaporator. The object of research is the refrigerator’s evaporator, working as part of the calorimetric stand. The parameters to which attention was paid in the experiment were the heat transfer coefficient and the heat loss coefficient. One of the most problematic places is the use of model manometers and thermometers, which required manual data removal. The problem can be solved by replacing analog devices with digital ones with constant parameter removal and automatic recording and processing by computer. It also took a long time to establish the regime.

During the study, data were obtained that when using nanofluids as a working medium, it is possible to increase the heat transfer coefficient by 21 % at a mode with a boiling point of –20 °C and a condensation temperature of 40 °C and also by 18.1 % at the mode with boiling point –15 °С. The heat loss coefficient in the evaporator can be increased to 7.5 %. This is due to the fact that the proposed method of introducing impurities of titanium oxide into the working fluid of the refrigerator leads to an increase in thermal conductivity, and hence to an improvement in heat transfer in heat exchangers. The use of nanofluids makes it possible to significantly increase the heat and mass transfer characteristics of the refrigerant, as compared with the means that require structural changes in the refrigerator circuit, to reduce temperature differences on the surfaces of the condenser and evaporator. And as a result, to reduce the ratio of boiling and condensing pressures, and, consequently, the electric power consumed by the refrigerator without adding additional elements to the apparatus. The industries of rational use of these additives are enterprises and the production of low-capacity refrigerators, including household appliances.

Author Biographies

Valery Milowanov, V. S. Martynovskyi Educational and Scientific Institute of Cold, Cryotechnologies and Environmental Energy, Odessa National Academy of Food Technologies, 112, Kanatna str., Оdessa, Ukraine, 65039

Doctor of Technical Sciences, Professor, Head of Department

Department of Compressors and Pneumounit

Dmitriy Balashov, V. S. Martynovskyi Educational and Scientific Institute of Cold, Cryotechnologies and Environmental Energy, Odessa National Academy of Food Technologies, 112, Kanatna str., Оdessa, Ukraine, 65039

Engineer

References

  1. Saidur, R., Leong, K. Y., Mohammad, H. A. (2011). A review on applications and challenges of nanofluids. Renewable and Sustainable Energy Reviews, 15 (3), 1646–1668. doi: http://doi.org/10.1016/j.rser.2010.11.035
  2. Choi, S. U. S., Eastman, J. A. (1995). Enhancing thermal conductivity of fluids with nanoparticles. Conference: 1995 International mechanical engineering congress and exhibition. San Francisco. Available at: http://www.osti.gov/scitech/servlets/purl/196525
  3. Strandberg, R., Das, D. K. (2010). Finned tube performance evaluation with nanofluids and conventional heat transfer fluids. International Journal of Thermal Sciences, 49 (3), 580–588. doi: http://doi.org/10.1016/j.ijthermalsci.2009.08.008
  4. Xuan, Y., Li, Q. (2003). Investigation on Convective Heat Transfer and Flow Features of Nanofluids. Journal of Heat Transfer, 125 (1), 151–155. doi: http://doi.org/10.1115/1.1532008
  5. Hamilton, R. L., Crosser, O. K. (1962). Thermal Conductivity of Heterogeneous Two-Component Systems. Industrial & Engineering Chemistry Fundamentals, 1 (3), 187–191. doi: http://doi.org/10.1021/i160003a005
  6. Xuan, Y., Roetzel, W. (2000). Conceptions for heat transfer correlation of nanofluids. International Journal of Heat and Mass Transfer, 43 (19), 3701–3707. doi: http://doi.org/10.1016/s0017-9310(99)00369-5
  7. Li, C. H., Peterson, G. P. (2006). Experimental investigation of temperature and volume fraction variations on the effective thermal conductivity of nanoparticle suspensions (nanofluids). Journal of Applied Physics, 99 (8), 084314. doi: http://doi.org/10.1063/1.2191571
  8. Li, C. H., Peterson, G. P. (2007). Mixing effect on the enhancement of the effective thermal conductivity of nanoparticle suspensions (nanofluids). International Journal of Heat and Mass Transfer, 50 (23-24), 4668–4677. doi: http://doi.org/10.1016/j.ijheatmasstransfer.2007.03.015
  9. Chon, C. H., Kihm, K. D. (2005). Thermal Conductivity Enhancement of Nanofluids by Brownian Motion. Journal of Heat Transfer, 127 (8), 810. doi: http://doi.org/10.1115/1.2033316
  10. Das, S. K., Choi, S. U. S., Patel, H. E. (2006). Heat Transfer in Nanofluids – A Review. Heat Transfer Engineering, 27 (10), 3–19. doi: http://doi.org/10.1080/01457630600904593
  11. Kim, S. H., Choi, S. R., Kim, D. (2007). Thermal Conductivity of Metal-Oxide Nanofluids: Particle Size Dependence and Effect of Laser Irradiation. Journal of Heat Transfer, 129 (3), 298–307. doi: http://doi.org/10.1115/1.2427071
  12. Lee, S., Choi, S. U.-S., Li, S., Eastman, J. A. (1999). Measuring Thermal Conductivity of Fluids Containing Oxide Nanoparticles. Journal of Heat Transfer, 121 (2), 280–289. doi: http://doi.org/10.1115/1.2825978

Downloads

Published

2018-12-31

How to Cite

Milowanov, V., & Balashov, D. (2018). Improvement of thermotechnical properties of refrigerator’s evaporator using nanoparticles. Technology Audit and Production Reserves, 2(1(46), 9–14. https://doi.org/10.15587/2312-8372.2019.167453

Issue

Vol. 2 No. 1(46) (2019): Industrial and Technology Systems

Section

Technology and System of Power Supply: Original Research

License

Copyright (c) 2019 Valery Milowanov, Dmitriy Balashov

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.