バイオマス由来ガス燃料を利用した小型ガスエンジンシステム(<特集>バイオマス燃料用レシプロエンジンの開発動向)

概要

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In this paper, development of small size gas engine system for gaseous fuels generated form biomass in university of Tokyo is introduced. Problem of using biomass gas in gas engines is varying component for resources and gasification conditions. Another problem is that generation efficiency of small size gas engine is not high. Thus, our laboratory works on developing a fuel flexible engine controller with automobile gasoline engine and applying the fuel to HCCI engines. A fuel flexible gas engine control system, which can predict the effectual premixture condition and ignition timing for fuel compositions automatically analyzing in-cylinder pressure data in real time, is developed. The fuel flexible engine system was connected to a gasification plant using wood chip and operation test was carried out. As a result, the engine system could set optimum premixture condition and ignition timing, which realized stable and high thermal efficiency automatically. Using a modified gas engine with an air inlet heater and high-compression- ratio pistons, HCCI combustion experiments were carried out. The engine realizes 42% of the indicated thermal efficiency, which is 10 points higher than the traditional combustion mode, and the potential of HCCI for obtaining a high thermal efficiency with biomass gas is indicated.
一般社団法人日本エネルギー学会の論文
2009-09-20