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http://dx.doi.org/10.7316/KHNES.2018.29.2.139

The Ejector Design and Test for 125 kW Class Molten Carbonate Fuel Cell System  

KIM, BEOMJOO (Korea Electric Power Corporation Research Institute)
PARK, SOO-MAN (Korea Electric Power Corporation Research Institute)
SONG, OH-SEOP (Department of Mechanical Engineering, Chungnam National University)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.29, no.2, 2018 , pp. 139-147 More about this Journal
Abstract
Korea Electric Power Research Institute (KEPCO RI) had developed molten carbonate fuel cell (MCFC) system since 1993. Finally, KEPCO RI developed and operated a 125 kW MCFC system in 2010. To make MCFC system compact, it is indispensable to install an ejector in this system where the anode off gas, the cathode off gas, and fresh air are mixed before flowing to the catalytic burner. KEPCO RI had developed various ejectors for MCFC system since 2006. The 125 kW MCFC system built with the developed ejector was operated successfully in Boryeong Thermal Power Plant in 2010. This 125 kW MCFC ejector was designed on the basis of the experimental results of 5 kW and 75 kW MCFC ejectors. The main goal of ejector design in our MCFC system is to maintain the entrainment ratio and the pressure between fuel cell stack and catalytic burner within the operating range. In this paper, the design results of the ejector are presented based on the 125 kW MCFC system operating conditions. In addition, a designed ejector was manufactured and installed in the MCFC system. As the fuel cell is under load operation, the pressure surrounding the ejector was measured to ensure that the fuel cell system is operating smoothly.
Keywords
Molten carbonate fuel cell; Ejector; Entrainment atio; Nozzle;
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