An ejector is a machine for mixing and transporting fluid under vacuum. Ejectors enhance system efficiency, are easily operated, have a mechanically simple structure, and do not require a power supply. Because of these advantages, ejectors have been used in a variety of industrial fields such as refrigeration systems, power plants, and oil plants. In this work, an ejector was used to safely recycle anode tail gas in a 75 kW molten carbonate fuel cell (MCFC) system at Korea Electric Power Research Institute. In this system, the ejector was placed at the mixing point between the anode tail gas and either the cathode tail gas or fresh air. Because commercial ejectors are not designed for the operating conditions of our fuel cell system, a new ejector was designed for use beyond the operating limits of conventional ejectors. In this study, the entrainment ratio and anode outlet pressure were measured according to the ratio of the nozzle diameter to the throat diameter in the newly designed ejector. These results help to define important criteria of ejectors for MCFC recycling.
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e-mail: bjkim@kepri.re.kr
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February 2011
This article was originally published in
Journal of Fuel Cell Science and Technology
Technical Briefs
The Ejector Performance of a 75 kW Molten Carbonate Fuel Cell System
Beomjoo Kim,
e-mail: bjkim@kepri.re.kr
Beomjoo Kim
Korea Electric Power Research Institute (KEPRI)
, 65 Munji-Ro, Yuseong-Gu, Daejeon 305-380, Republic of Korea
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Do Hyung Kim,
Do Hyung Kim
Korea Electric Power Research Institute (KEPRI)
, 65 Munji-Ro, Yuseong-Gu, Daejeon 305-380, Republic of Korea
Search for other works by this author on:
Junghyun Lee,
Junghyun Lee
Korea Electric Power Research Institute (KEPRI)
, 65 Munji-Ro, Yuseong-Gu, Daejeon 305-380, Republic of Korea
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Seung Won Kang,
Seung Won Kang
Korea Electric Power Research Institute (KEPRI)
, 65 Munji-Ro, Yuseong-Gu, Daejeon 305-380, Republic of Korea
Search for other works by this author on:
Hee Chun Lim
Hee Chun Lim
Korea Electric Power Research Institute (KEPRI)
, 65 Munji-Ro, Yuseong-Gu, Daejeon 305-380, Republic of Korea
Search for other works by this author on:
Beomjoo Kim
Korea Electric Power Research Institute (KEPRI)
, 65 Munji-Ro, Yuseong-Gu, Daejeon 305-380, Republic of Koreae-mail: bjkim@kepri.re.kr
Do Hyung Kim
Korea Electric Power Research Institute (KEPRI)
, 65 Munji-Ro, Yuseong-Gu, Daejeon 305-380, Republic of Korea
Junghyun Lee
Korea Electric Power Research Institute (KEPRI)
, 65 Munji-Ro, Yuseong-Gu, Daejeon 305-380, Republic of Korea
Seung Won Kang
Korea Electric Power Research Institute (KEPRI)
, 65 Munji-Ro, Yuseong-Gu, Daejeon 305-380, Republic of Korea
Hee Chun Lim
Korea Electric Power Research Institute (KEPRI)
, 65 Munji-Ro, Yuseong-Gu, Daejeon 305-380, Republic of KoreaJ. Fuel Cell Sci. Technol. Feb 2011, 8(1): 014503 (8 pages)
Published Online: November 1, 2010
Article history
Received:
August 18, 2009
Revised:
April 14, 2010
Online:
November 1, 2010
Published:
November 1, 2010
Citation
Kim, B., Kim, D. H., Lee, J., Won Kang, S., and Lim, H. C. (November 1, 2010). "The Ejector Performance of a 75 kW Molten Carbonate Fuel Cell System." ASME. J. Fuel Cell Sci. Technol. February 2011; 8(1): 014503. https://doi.org/10.1115/1.4002131
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