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ISSN Online: 2377-424X

ISBN Print: 0-89116-559-2

International Heat Transfer Conference 8
August, 17-22, 1986, San Francisco, USA

BOILING HEAT TRANSFER ON FINNED TUBE BUNDLES -THE EFFECT OF TUBE POSITION AND INTERTUBE SPACING

Get access (open in a dialog) DOI: 10.1615/IHTC8.4110
pages 2111-2116

Аннотация

An experimental investigation is described for measuring boiling heat transfer coefficients for finned tube bundles. The investigation was carried out in Rll at a saturation state of 1 bar. The tube bundle used consists of 18 finned tubes, each tube heated separately with an internal electrical heater. The tubes are arranged with triangular pitch in three vertical rows with six tubes in each row. The intertube spacing was varied. For the regime of fully developed boiling the measurements show that tube position and intertube spacing have only little effect on heat transfer. For the transition regime between natural convection and nucleate boiling and the regime of not fully developed boiling it is found that the tube position and the intertube spacing affect the boiling heat transfer coefficient to a considerable degree. The results of the investigations with three tube bundles with different intertube spacing are correlated in empirical equations.