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Effect of Vanes on Flow Distribution in a Diffuser Type Recuperator Header  

Jeong Young-Jun (Graduate School, Kookmin University)
Kim Seo-Young (Thermal/Flow Control Research Center, KIST)
Kim Kwang-Ho (Thermal/Flow Control Research Center, KIST)
Kwak Jae-Su (School of Aerospace and Mechanical Engineering, Hankuk Aviation University)
Kang Byung-Ha (School of Mechanical and Automotive Engineering, Kookmin University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.18, no.10, 2006 , pp. 819-825 More about this Journal
Abstract
In a SOFC/GT (solid oxide fuel cell/gas turbine) hybrid power generation system, the recuperator is an indispensible component to enhance system performance. Since the expansion ratio to the recuperator core is very large, generally, the effective header design to distribute the flow uniformly before entering the core is crucial to guarantee the required performance. In the present study, we focus on the design of a diffuser type recuperator header with a 90 degree turn inlet port. To reduce the flow separation and recirculation flows, multiple horizontal vanes are used. The number of horizontal vanes is varied from 0 to 24. The air flow velocity is measured at 40 points just behind the core outlet by using a hot wire anemometer. Then, the flow non-uniformity is evaluated from the measured flow velocity. The experimental results showed that inlet air velocity did not effect on relative flow non-uniformity. According to increasing the number of horizontal vanes, flow non-uniformity reduced about $40{\sim}50%$ than without using horizontal vanes.
Keywords
Recuperator header; Flow distribution; Horizontal vane; Flow non-uniformity;
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  • Reference
1 Jiao, A., Li, Y., Chen, C. and Zhang, R., 2003, Expeimental investigation on fluide flow maldistribution in plate-fin heat 24, pp. 25-31
2 Jiao, A., Zhang, R. and Jeong, S., 2003, Experimental investigation of header configuration on flow maldistribution in plate-fin heat exchanger, Applied Thermal Engineering, Vol. 23, pp. 1235-1246   DOI   ScienceOn
3 Fuel Cell Annual Report, 2003, US Department of energy, NEFL
4 Kay, W. M. and London, A. L., 1984, Compact Heat Exchanger, 3rd ed., McGraw-Hill
5 Wen, J. and Li, Y., 2004, Study of flow distribution and its improvement on the header of plate-fin heat-exchanger, Cryogenics, Vol. 44, pp. 823-831   DOI   ScienceOn
6 Lalot, S., Florent, P., Lang, S. K. and Bergles, A. E., 1999, Flow distribution in heat exchanger, Applied Thermal Engineering, Vol. 19, pp.847-863   DOI   ScienceOn