INFLUENCE OF HEAT SURFACE PROPERTIES ON INTENSITY OF HEAT EXCHANGE AT NANOFLUIDS BOILING
Boiling of liquids is widely used in energetics, because of its high intensity of heat exchange, especially when nanofluids (NF) used as coolants. Such boiling process is accompanied with spontaneous formation of various nanostructures of diferent architecture, porosity and roughness on heating surface. The purpose of research is estimating correlation between heat transfer intensity of NF boiling and properties of nanostructured deposits on heating surface. Experiments were performed by specially designed and fully automated test unit, equipped with DC power supply and operated by program enabling to control in real time by PC all the parameters of a critical mode including CHF. Experimental data analysis (graphs, charts, SEM images, porosity measurement) shows that maximum heat transfer characteristics of NF boiling (q, a) were registered in the case of NFs with a mixture of NPs of anisometric shape, giving duringboiling nanostructures with the most developed surface porosity and roughness. Bibl. 20, Fig. 4, Table 2.
Bondarenko B.I., Moraru V.N., Sydorenko S.V., Komysh D.V., Khovavko A.I., Snigur A.V. Some peculiarities of heat exchange at pool boiling of aluminosilicates-water based nanofluids. Proceedings of the 8 th International Symposium on Heat Transfer, Beijing, China, Oct. 21–24, 2012, ISHT8-04-05, pp.181–190.
Bondarenko B.I, Moraru V.N., Sydorenko S.V., Komysh D.V., Khovavko A.I. Nanofluids for energetics : Effect of stabilization on the critical heat flux at boiling. Technical Physics Letters, 2012, 38 (9), pp. 853–857.
Bondarenko B.I, Moraru V.N., Ilienko B.K., Khovavko A.I., Komysh D.V., Panov E.M., Sydorenko S.V., Snigur O.V. Study of a heat transfer mechanism and critical heat flux at nanofluids boiling. International Journal of Energy for a Clean Environment,2013, 14 (2–3), pp. 151–168.
Kandlikar S.G., A Theoretical Model to Predict Pool Boiling CHF Incorporating Effects of Contact Angle and Orientation, Journal of Heat Transfer-Transactions of the ASME, 2001, 123, pp. 1071–1079.
Son G., Dhir V.K. and Ramanujapu N., Dynamics and Heat Transfer Associated With a Single Bubble During Nucleate Boiling on a Horizontal Surface, Journal of Heat Transfer-Transactions of the
ASME, 1999, 121, pp. 623–631.
Adamson A. Physical Chemistry of Surfaces. Moscow : Mir, 1979, 568 p. (Rus.)
Lu Yen-Wen and Kandlikar Satish G., Nanoscale Surface Modification Techniques for Pool Boiling Enhancement : A Critical Review and Future Directions, Heat Transfer Engineering, 2011, 32 (10), pp. 827–842.
Kim S.J., Bang I.C., Buongiorno J., Hu L.W., Effects of nanoparticle deposition on surface wettability influencing boiling heat transfer in nanofluids, Applied Physics, 2006, 89, pp. 153107–1–3.
Kim S.J., Bang I.C., Buongiorno J., Hu L.W., Study of Pool Boiling and Critical Heat flux Enhancement in Nanofluids, Bulletin of the Polish Academy of Sciences, Technical Sciences, 2007, 55 (2), pp. 211–216.
Kim S.J., Bang I.C., Buongiorno J., Hu L.W., Surface Wettability Change During Pool Boiling of Nanofluids and Its Effect on Critical Heat Flux, International Journal of Heat and Mass Transfer, 2007, 50, pp. 4105–4116.
Theofanus T.G. The boiling crisis phenomenon. Part 2: Dryout dynamics and burnout, Experimental Thermal and Fluid Science,2002, 26, pp. 793–810.
Pham Q.T., Kim T.I., Lee S.S., Chang S.H. Enhancement of critical heat flux using nanofluids for Invessel Retention-External Vessel Cooling. Applied Thermal Engineering, 2012, 35, pp. 157–165.
Nan C.-W., Birringer R., Clarke D.R., Gleiter H. Effective thermal conductivity of particulate composites with interfacial thermal resistance. Journal of Applied Physics, 1997, 81 (10), pp. 6692–6699.
Eastman J.A., Choi S.U.S., Li S., Yu W., Thompson L.J., Anomalously increased effective thermal conductivities of ethylene glycol-based nanofluids containing copper nanoparticles, Appl. Phys. Letters, 2001, 78, pp. 718–720.
Keblinski P., Phillpot S.R., Choi S.U.S., Eastman J.A., Mechanisms of heat flow in suspensions of nano-sized particles (nanofluids), International Journal of Heat and Mass Transfer, 2002, 45, pp. 855–863.
Yu W., France D.M., Routbort J.L., Choi S.U.S. Review and comparison of nanofluid thermal conductivity and heat transfer enhancements. Heat Transfer Engineering, 2008, 29 (5), pp. 432–460.
Das S.K., Putra N., Roetzel W., Pool Boiling Characteristics of Nano-Fluids,International Journal of Heat and Mass Transfer, 2003, 46, pp. 851–862.
Milanova, D., and Kumar, R., Role of Ions in Pool Boiling Heat Transfer of Pure and Silica Nanofluids, Applied Physics Letters, 2005, 87, pp. 233107.
Bang I.C., Chang S.H., Boiling Heat Transfer Performance and Phenomena of Al2O3-water NanoFluids From a Plain Surface in a Pool,International Journal of Heat and Mass Transfer, 2005,48, pp. 2407–2419.
Jo B., Jeon P.S., Yoo J., Kim H.J., Wide Range Parametric Study for the Pool Boiling of Nano-Fluids With a Circular Plate Heate. Journal of Visualization, 2009, 12, pp. 37–46.