Chapter 53. Performance of Sub-Scale Ceramic-Metal Hybrid Heat Exchanger in a Coal Combustion Environment

  1. John B. Wachtman Jr.
  1. John E. Holowczak1,
  2. Norman S. Bornstein1,
  3. Tina M. Watne2 and
  4. Jay R. Gunderson2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314821.ch53

Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 17, Issue 3

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

Author Information

  1. 1

    United Technologies Research Center, Materials and Structures Technology, M/S 129–22, East Hartford, CT 06108

  2. 2

    Energy and Environmental Research Center, University of North Dakota, P.O. Box 8213, Grand Forks, ND 58202

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1996

ISBN Information

Print ISBN: 9780470375426

Online ISBN: 9780470314821

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Keywords:

  • hybrid;
  • efficiency;
  • monolithic;
  • ceramic refractories;
  • alkaline;
  • composition

Summary

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.