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ISSN Online: 2377-424X

ISBN Print: 0-89116-130-9

International Heat Transfer Conference 6
August, 7-11, 1978, Toronto, Canada

EXPERIMENTS ON HEAT TRANSFER IN INERTGAS−VAPOR−MIXTURES FOR MIDDLE PRESSURES

Get access (open in a dialog) DOI: 10.1615/IHTC6.230
pages 449-452

Resumo

Former experiments enlarging an experimental plant were projected and established for measuring the heat transfer by condensation of vapor from inertgas−vapor−mixtures for a system-pressure up to 2,5 MPa. The main part of the plant is a condensation pipe arranged vertically. It is a high-pressure-pipe with 10 mm inner, 24 mm outer diameter and a length of 3395 mm. Around the condensation pipe, a second pipe with a diameter of 40 mm is established. In this pipe the cooling is placed. A sequential balance and numerical calculation of the condensation pipe was possible through a number of temperature and mass measurements. Defined mixtures of water-vapor (H2O) and nitrogen (N2) under the pressure of 1,5 and 2,5 MPa were needed as a typical system of substances.

The discussion of the experimental data has shown that the 2. Virial coefficient must be introduced into numerical calculations. In this way the heat transfer coefficients were calculated in relation to the concentration of the mixture and within a range of 2,5 m/s<w<10 m/s for the velocity w. The tendency of the heat transfer coefficients agrees with qualitativ reflections. The experimental data can also be used for the calculation of mass transfer coefficients.