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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-421-2

International Heat Transfer Conference 15
August, 10-15, 2014, Kyoto, Japan

Mathematical Derivation on Heat Transfer Improvement of the Air-Cooled Condenser Cell in a Power Plant

Get access (open in a dialog) DOI: 10.1615/IHTC15.hte.008727
pages 4021-4029

Resumo

The air-cooled condenser (ACC) is a kind of special A-shaped heat exchanger in which rotating fans force the ambient air to pass the finned-tube bundles to cool and condense the steam in a power plant. Comparing with water-cooled condenser, in addition to the benefit of water saving, ACC can also reduce the coal consumption. Firstly, a set of equations describing the flow and heat transfer in the ACC cell was derived, and then the effect of air mass flow distributions on the heat transfer was described as an optimization problem. Based on the mathematical modelling, it was deduced that the uniform outflow can result in the maximum total rate of heat transfer on the ACC cell on the condition of the same outflow rate. This work also compared potentialities of outflow distributions, temperature differences and fan masses in the extent of increasing the heat transfer rate. These analysis can be treated as the reference of other heat exchangers on a large scale, and specially highlight the attention using mathematical modelling to analyse the heat transfer improvement of heat exchangers.