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A theoretical Analysis and CFD Simulation on the Ceramic Heat Exchanger  

Paeng, Jin-Gi (Department of Mechanical Engineering, Graduate school, Changwon National University)
Yoon, Young-Hwan (Department of Mechanical Engineering, Changwon National University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.21, no.5, 2009 , pp. 282-290 More about this Journal
Abstract
A ceramic monolith heat exchanger is studied to find the performance of heat transfer and pressure drop by numerical computation and $\xi$-NTU method. The numerical computation was performed throughout the domain including fluid region in exhaust gas-side rectangular ducts, ceramic core and fluid region in air-side rectangular duct with the air and exhaust in cross flow direction. In addition, the heat exchanger was also analyzed to estimate the performance by conventional $\xi$-NTU method with several Nusselt number correlations for flow in rectangular duct from literature. By comparisons of both performances by the numerical computation and the $\xi$-NTU method, the effectiveness by $\xi$-NTU method was closest to the result by numerical computation within a relative error of 2.14% when Stephan's Nusselt number correlation was adopted to the $\xi$-NTU method among the several correlations.
Keywords
Ceramic Recuperator; Cross-flow; Recuperator; Effectiveness; HRU;
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