5-2-3 超過膨張サイクル機関の模擬バイオガスによる運転(5-2 燃焼・熱利用2,Session 5 燃焼・熱利用)

概要

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A method to utilize biomass resource is gasification which produces gases including H2,CO,CH4, CO_2 and N2. In This study high expansion ratio SI-Engine was used in order to increase gross indicated thermal efficiency. However, even expansion ratio was enhanced, combustion duration does not change, but heat loss in unit time was increased. So it is necessary to shorten combustion duration when high expansion ratio is used. In low expansion ratio, N2 dilution does not affect gross indicated thermal efficiency, but CO_2 dilution reduces gross indicated thermal efficiency. As the expansion ratio is increased, the effect of N2 dilution to decrease the thermal efficiency became remarkable. And the CO_2 dilution effect showed the tendency as same as N2 dilution.
2012-07-30