Chapter 53. Performance of Sub-Scale Ceramic-Metal Hybrid Heat Exchanger in a Coal Combustion Environment
- John B. Wachtman Jr.
Published Online: 26 MAR 2008
Copyright © 1996 The American Ceramic Society
Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 17, Issue 3
How to Cite
Holowczak, J. E., Bornstein, N. S., Watne, T. M. and Gunderson, J. R. (1996) Performance of Sub-Scale Ceramic-Metal Hybrid Heat Exchanger in a Coal Combustion Environment, in Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 17, Issue 3 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314821.ch53
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 1996
Print ISBN: 9780470375426
Online ISBN: 9780470314821
- ceramic refractories;
Indirect, coal fired gas turbine based power systems offer the potential for significantly increasing the electrical generating efficiency of coal fired power systems. Heat exchangers, capable of transferring heat from the corrosive coal combustion environment to a clean working fluid, are the chief obstacle preventing use of such systems. A subscale, hybrid ceramic lined metallic heat exchanger was designed and tested. Seven types of ceramic lining materials, mounted to a superal-loy heat exchanger panel, were exposed for 106 hours in a coal combustor fired on Illinois #6 bituminous coal. Clean air flowing through the exchanger was heated to approximately 910°C. No recession due to flowing coal ash was observed for chromia/alumina compositions containing 30% chromia. Fusion cast high alumina and alumina/zirconia/silica had lower recession rates when compared to bonded fused grain materials having similar compositions.