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.

주제어

#레큐퍼레이터 헤더   #유동분배   #수평 베인   #유동 불균일도  

저자의 다른 논문

참고문헌 (6)

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. Fuel Cell Annual Report, 2003, US Department of energy, NEFL 
3. 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 
4. 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 
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 
6. Kay, W. M. and London, A. L., 1984, Compact Heat Exchanger, 3rd ed., McGraw-Hill 

이 논문을 인용한 문헌 (1)

1. Han, Hwa-Taik ; Shin, Dong-Sin ; Choi, Chang-Ho ; Lee, Dae-Young ; Kim, Seo-Young ; Kwon, Yong-Il 2008. "Recent Progress in Air Conditioning and Refrigeration Research: A Review of Papers Published in the Korean Journal of Air-Conditioning and Refrigeration Engineering in 2006" 설비공학논문집 = Korean journal of air-conditioning and refrigeration engineering, 20(6): 427~446  원문보기 상세보기