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Thermal Sciences 2000. Proceedings of the International Thermal Science Seminar. Volume 2
June, 11-14, 2000, Bled, Slovenia

DOI: 10.1615/ICHMT.2000.TherSieProcVol2


ISBN Print: 978-961-6353-27-4

Abstract of "A TUBE-IN-TUBE WATER/ZEOTROPIC MIXTURE CONDENSER: DESIGNING PROCEDURE AGAINST EXPERIMENTAL DATA"

page 132
DOI: 10.1615/ICHMT.2000.TherSieProcVol2.530
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SINOPSIS

The object of the present paper is related to the design of condensers for the non-azeotropic mixtures of refrigerants. The high temperature glide mixture R-125/236ea at three different compositions (0.30/0.70, 0.46/0.54, 0.64/0.36 by mass) was tested during condensation inside a 2 m long smooth horizontal tube-in-tube exchanger. The superheated vapour entering the tube is first cooled and then condensed against cold water flowing in the annulus. The experimental data, taken at 400 and 750 kg/(m2 s) mass velocity, is used for comparison against the method of Colburn and Drew (1937). It is shown that the above method gives a reasonably good prediction of the heat flux exchanged in the tube.

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