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Methodical peculiarities of the pool boiling processes investigations of nanofluids

UDC 536.24

Methodical peculiarities of the pool boiling processes investigations of nanofluids

Zhelezny V. P., Semenuk U. V., Lukianov M. M., Nikulin A. G.

Abstract
One of the modern methods of heat exchange intensification in the refrigeration units is application of new working media with better properties of hat transfer e.g. nanofluids. This paper presents the results of comprehensive experimental study of nanofluids during pool boiling processes, which include not only the nanoparticles, but surfactants also. It is shown that the boiling performance of nanofluids depends on such factors as concentration of nanoparticles and surfactant, heat flux densities, boiling temperature and stability of nanofluids. The contribution of each factor depends on the conditions in which the boiling processes occur. Therefore, the conclusions about the application prospects of nanofluids in refrigeration cannot be made in general, but must be specified to its operation conditions.

Keywords: pool boiling, heat-transfer coefficient, bubble departure diameter, refrigerant/oil solution, nanofluid, surfactant.

All references

1. Shen B., Groll E.A. A Critical Review of the Influence of Lubricants on the Heat Transfer and Pressure Drop of Refrigerants. Part I: Lubricant Influence on Pool and Flow Boiling. Int. Journal of HVAC&R Research. 2005. Vol. 11. No 3. P. 341-355.

2. Shen B., Groll E.A. A Critical Review of the Influence of Lubricants on the Heat Transfer and Pressure Drop of Refrigerants. Part II: Lubricant Influence on Condensation and Pressure Drop. Int. Journal of HVAC&R Research. 2005. Vol. 11. No 4. P. 511-526.

3. Kedzierski M.A. The Effect of Lubricant Concentration, Miscibility, and Viscosity on R134a Pool Boiling. Int. J. of Refrig. 2001. Vol. 24. No 4. P. 348-366.

4. Kedzierski M.A. Effect of Bulk Lubricant Concentration on the Excess Surface Density During R123 Pool Boiling. Int. J. of Refrig. 2002. Vol. 25. No 8. P. 1062-1071.

5. Kedzierski M.A. Use of Fluorescence to Measure the Lubricant Excess Surface Density During Pool Boiling. Int. J. of Refrig. 2002. Vol. 25. No 8. P. 1110-1122.

6. Thome J.R., Phil D. Comprehensive Thermodynamic Approach to Modeling Refrigerant-Lubricating Oil Mixtures. Int. Journal of HVAC&R Research. 1995. Vol. 1. No 2. P. 110-125.

7. Naphon P., Assadamongkol P., Bororak T. Experimental Investigation of Titanium Nanofluids on the Heat Pipe Thermal Efficiency. Int. Commun. Heat Mass. Transfer. 2008. Vol. 35. P. 1316-1319.

8. Nikitin D., Zhelezny V., Grusko V., Ivchenko D. Surface Tension, Viscosity, and Thermal Conductivity of Nanolubricants and Vapor Pressure of Refrigerant/Nanolubricant Mixtures. Estern-European Journal of enterprise technogies. 2012. Vol. 5/5. N 59. P. 12-17.

9. Xuan Y., Li Q. Investigation on Convective Heat Transfer and Flow Features of Nanofluids. J. Heat Transfer. 2003. Vol. 125. P. 151-155.

10. Trisaksri V. Wongwises S. Nucleate pool boiling heat transfer of TiO2-R141b nanofluids. Int. J. Heat Mass. Transfer. 2009. Vol. 52. P. 1582-1588.

11. Kim H., Kim J., Kim M. Experimental Study on CHF Characteristics of Water-TiO2 Nano-Fluids. Nuclear Engineering and Technology. 2006. Vol. 38. No 1. P. 61-68.

12. Kim S.J., Bang I.C., Hu L. W. Effects of Nanoparticle Deposition on Surface Wettability Influencing Boiling Heat Transfer in Nanofluids. Applied Physics Letters. 2006. Vol. 89. No 15.

13. Никулин А.Г., Семенюк Ю.В., Лукьянов Н.Н. Экспериментальная установка для исследования процессов кипения чистых жидкостей и растворов в свободном объеме // Холодильная техника и технология. 2013. № 4(144). C. 12-18. [Nikulin A.G., Semenyuk Yu.V., Luk'yanov N.N. The experimental installation for research of processes of boiling of pure liquids and solutions in the free volume. Kholodil'naya tekhnika i tekhnologiya. 2013. N 4(144). P. 12-18. (in Russian).]

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