INFLUENCE OF HEAT SURFACE PROPERTIES ON INTENSITY OF HEAT EXCHANGE AT NANOFLUIDS BOILING

  • V.N. Moraru The Gas Institute of the National Academy of Sciences of Ukraine, Kyiv
  • D.V. Komysh The Gas Institute of the National Academy of Sciences of Ukraine, Kyiv
  • A.I. Khovavko The Gas Institute of the National Academy of Sciences of Ukraine, Kyiv
  • O.V. Snigur The Gas Institute of the National Academy of Sciences of Ukraine, Kyiv
  • N.N. Gudkov National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», Kyiv
  • N.A. Sydorenko National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», Kyiv
Keywords: nanofluids, heat exchange, heating surface, sediment

Abstract

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.

Author Biographies

V.N. Moraru, The Gas Institute of the National Academy of Sciences of Ukraine, Kyiv

Candidate of Technical Sciences

A.I. Khovavko, The Gas Institute of the National Academy of Sciences of Ukraine, Kyiv

Candidate of Technical Sciences

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Published
2015-04-20
How to Cite
Moraru, V., Komysh, D., Khovavko, A., Snigur, O., Gudkov, N., & Sydorenko, N. (2015). INFLUENCE OF HEAT SURFACE PROPERTIES ON INTENSITY OF HEAT EXCHANGE AT NANOFLUIDS BOILING. Energy Technologies & Resource Saving, (2), 25-33. Retrieved from https://etars-journal.org/index.php/journal/article/view/138
Section
Thermophysical basics of energy processes

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