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Theoretical and numerical analyses of a ceramic monolith heat exchanger

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Abstract

This study assessed the performance of a ceramic monolith heat exchanger, estimating heat transfer and pressure drop by numerical computation and the ε-NTU method. A heat exchanger consists of rectangular ducts for exhaust gas, a ceramic core, and rectangular ducts for air and exhaust gases, as well as air in the cross-flow direction. The numerical computations were performed for the whole domain, including the exhaust gas, ceramic core, and air. In addition, the heat exchanger was examined using a conventional ε-NTU method with several Nusselt number correlations from the literature to characterize the flow in the rectangular duct. The results of these numerical computation analyses demonstrated that the effectiveness of the heat exchanger, as demonstrated using the ε-NTU method with Stephan’s Nusselt number correlation, came closest to the results of computation with a relative error of 2%. The air-side pressure drops indicated by the results of numerical computation were 13–22% higher than those calculated using the head loss equation with the inclusion of a friction factor that was obtained from previous experiments examining heat transfer conditions.

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Authors and Affiliations

  1. School of Mechanical and Aerospace Engineering, Gyeongsang National University, Jinju, 660-701, Korea

    Jin Gi Paeng

  2. Department of Mechanical Engineering, Changwon National University, Changwon, 641-773, Korea

    Young Hwan Yoon

  3. Division of Facilities, Changwon National University, Changwon, 641-773, Korea

    Kyung Hwan Kim

  4. Department of Naval Architecture and Marine Engineering, Changwon National University, Changwon, 641-773, Korea

    Keon Sik Yoon

Authors
  1. Jin Gi Paeng
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  2. Young Hwan Yoon
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  3. Kyung Hwan Kim
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  4. Keon Sik Yoon
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Corresponding author

Correspondence to Young Hwan Yoon.

Additional information

This paper was recommended for publication in revised form by Associate Editor Ji Hwan Jeong

Young-Hwan Yoon received his Ph. D in Mechanical Engineering from University of Iowa, U.S.A., in 1983. He is a Professor in the Department of Mechanical Engineering at Changwon National University, Changwon,, Korea. His main research interests are compact heat exchanger, numerical heat transfer, and air conditioning system. Currently, he is working on ceramic and metallic heat exchanger for heat recovery unit, coal drying system, and thermoelectric cooling system.

Jin-Gi Paeng received his Ph.D in Mechanical Engineering from Changwon National University, Changwon, Korea, in 2008. He is currently a research associate in the Department of Aerospace Engineering at Gyeongsang National University, Korea. His research interests are numerical heat transfer, FSI and FSW.

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Paeng, J.G., Yoon, Y.H., Kim, K.H. et al. Theoretical and numerical analyses of a ceramic monolith heat exchanger. J Mech Sci Technol 24, 1545–1551 (2010). https://doi.org/10.1007/s12206-010-0407-3

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  • DOI: https://doi.org/10.1007/s12206-010-0407-3

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