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首页> 外文期刊>International Journal of Heat Exchangers >Research and Development on the High Performance Ceramic Heat Exchangers
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Research and Development on the High Performance Ceramic Heat Exchangers

机译：高性能陶瓷换热器的研究与开发

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Research and development of ceramic heat exchangers, especially for gas turbines, were summarized, including recent studies on a fluidized bed ceramic heat exchanger and a ceramic finned tube. Ceramics had been utilized for elements of turbine blades and heat exchangers for regeneration. However, it is not easy to make any complicated surface configurations due to a manufacturing difficulty of the ceramics; then, the ceramic heat exchanger becomes huge. Using a high temperature fluidized bed, the outside heat transfer coefficient becomes increased even in the case of a smooth surface, and in the case of a ceramic finned tube, it was twenty times higher than that for a smooth tube in single phase flow. On the other hand, in a high temperature region, an inner finned tube is not useful for heat transfer enhancement since relaminarization occurs in the fan-shaped flow-duct formed by the inner radial ribs. As a result, a twisted tape was proposed for the inside heat transfer enhancement. Furthermore, a ceramic finned tube, that had a fin thickness and a fin pitch similar to those of ordinary metal finned tubes, was developed for a more compact and a higher performance ceramic heat exchanger.
机译：总结了陶瓷热交换器的研究和开发，特别是用于燃气轮机的陶瓷热交换器，包括对流化床陶瓷热交换器和陶瓷翅片管的最新研究。陶瓷已被用于涡轮叶片和热交换器的元件进行再生。但是，由于陶瓷的制造困难，难以制造复杂的表面形状。然后，陶瓷热交换器变大。使用高温流化床，即使在光滑表面的情况下，外部传热系数也增加，而在陶瓷翅片管的情况下，单相流中的传热系数比光滑管高二十倍。另一方面，在高温区域中，由于在由内部径向肋形成的扇形流道中发生再层化，所以内部翅片管对加强传热没有用。结果，提出了一种扭曲的胶带以增强内部传热。此外，开发了具有与普通金属翅片管类似的翅片厚度和翅片节距的陶瓷翅片管，以用于更加紧凑和高性能的陶瓷热交换器。

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