Axial profiles of heat transfer coefficients in a liquid film evaporator

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Regeneration is the most efficient way of managing used oil. It saves money by preventing costly clean-ups and liabilities associated with mismanagement of used oil and it also helps to protect the environment. A numerical study of the flow, heat and mass transfer characteristics of the vertical evaporating tube with the films flowing down on both the inside and the outside tube surfaces has been carried out. Condensation occurs along the outside wall surface and evaporation at the free surface of the inside film. The calculation domain of two film flow regions and tube wall is solved simultaneously. The longitudinal variation of temperature, mass flow rate, and hence the thickness of the films downward the tube can be obtained by applying conservation of the energy requirement to the differential element.

Frank P Incropera, David P DeWitt (1996) Fundamentals of Heat and Mass Transfer.

Nusselt W (1916) Die Oberflachenkondensation des Wasserdampfes, VDI-Zeitschrift 60: 542-575.

Kapitza PL (1948) J. Experimental Theoret. Phys. 18(1): 3-18.

Brauer H (1956) Stromung und Warmeubergang bei Rieselfilmen, VDI Forsch., Heft 457.

Kosky P (1971) Int. J Heat Mass Transfer 14: 1220-1224.

Kutadeladze S (1963) Fundamentals of heat transfer. Edward Arnold, London.

Portalsky S (1963) Studies of falling liquid film flow, Chem. Eng. Sci. 18: 787-804.

Acta Chimica Slovaca

The Journal of Slovak University of Technology in Bratislava

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