Abstract
A ceramic heat exchanger using a fluidized bed for generating high temperature gas was developed for the coal-fired gas turbine combined cycle. Smooth and externally finned ceramic tubes were used for the heat transfer tubes. The characteristics of heat transfer coefficients and the performance of the heat exchanger were evaluated. It was certified that the heat transfer coefficient on the outside wall of the tube was sharply increased by using both a fluidized bed and the finned heat transfer tubes. But, the overall coefficient of heat transmission was dominated by the heat transfer inside the tube . Therefore, heat transfer enhancement on the inside wall of the tube is needed. This was accomplished by external finning. It was found that relaminarization occurred at high heating rates. Experiments were performed and heat transfer coefficients on the inside wall of the tube at high heating rates were evaluated.
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© 1999 Springer Science+Business Media Dordrecht
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Kumada, M. (1999). A Study on the High Performance Ceramic Heat Exchanger for Ultra High Temperatures. In: Kakaç, S., Bergles, A.E., Mayinger, F., Yüncü, H. (eds) Heat Transfer Enhancement of Heat Exchangers. Nato ASI Series, vol 355. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9159-1_16
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DOI: https://doi.org/10.1007/978-94-015-9159-1_16
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-5190-5
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