Power demand patterns, such as for houses, fluctuate sharply. Therefore, if fuel cell cogeneration is installed in a house, partial-load operations with low efficiency frequently occur. On the other hand, if the hydrogen rate of hydrogenation gas-engine generation is increased at the time of low load, emission cleanup and brake thermal efficiency improve. So, in this paper, a hybrid cogeneration system that combines a hydrogenation gas engine and a solid polymer membrane-type fuel cell is proposed. So, operation of a fuel cell or a gas engine with the threshold value of load is investigated. In this paper, four systems were investigated by numerical analysis: independent hydrogenation gas-engine operation, solid polymer membrane-type fuel cell independent operation, that operates a fuel cell or a gas engine with the threshold value of load, and operation using a fuel cell to a base load. As a result, the operating method corresponding to a base load in polymer membrane-type fuel cell had the highest total efficiency. In this case, gas-engine generator (NEG) is operated corresponding to load fluctuation. Moreover, in the comparison results of carbon dioxide emissions, the hydrogenation operation of NEG achieved the best result.
Study on the Polymer Membrane-Type Fuel Cell and Hybrid Hydrogenation Engine System Considering Improvement of Efficiency for Partial-Load Operation
Obara, S., and Tanno, I. (September 5, 2008). "Study on the Polymer Membrane-Type Fuel Cell and Hybrid Hydrogenation Engine System Considering Improvement of Efficiency for Partial-Load Operation." ASME. J. Fuel Cell Sci. Technol. November 2008; 5(4): 041003. https://doi.org/10.1115/1.2889054
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