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Measurement of critical heat flux conditions under vacuum

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Abstract

Determination of optimum conditions for waste oil (used motor oils, transformer oils) regeneration using vacuum distillation was attempted including the search for the optimum temperature difference between the heating surface and the boiling point of the liquid. Optimum temperature allowed the distillation equipment to operate at maximum performance. Equipment suitable for the measurement of boiling curves under atmospheric pressure and vacuum conditions was assembled. These curves were used to determine the optimum temperature difference of various substances including waste oils. Properties of pure substances, for example water, ethanol, hexane, heptane, isooctane, decane, or dodecane, were measured with this equipment under atmospheric pressure. Results of various liquids measurements under vacuum and atmospheric pressure are presented.

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Authors and Affiliations

  1. Institute of Chemical and Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37, Bratislava, Slovakia

    Lenka Nemsilová, Pavol Timár Jr., Pavel Timár, Ján Stopka, Ladislav Štibrányi & Vladimír Báleš

Authors
  1. Lenka Nemsilová
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  2. Pavol Timár Jr.
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  3. Pavel Timár
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  4. Ján Stopka
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  5. Ladislav Štibrányi
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  6. Vladimír Báleš
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Correspondence to Pavel Timár.

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Dedicated to the memory of professor Elemír Kossaczký

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Nemsilová, L., Timár, P., Timár, P. et al. Measurement of critical heat flux conditions under vacuum. Chem. Pap. 68, 1767–1773 (2014). https://doi.org/10.2478/s11696-014-0621-z

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  • DOI: https://doi.org/10.2478/s11696-014-0621-z

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