416 バイオマスのガス燃料化と溶融炭酸塩形燃料電池コージェネレーションへの適用 : システムのモデル化と性能評価(新エネルギー(3))

概要

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Micro scale gasifier of the biomass of waste origin, which are woody pellets, using the superheated steam as a heating medium has been developed and the feasibility of the generation pyrolysis gas as a fuel for micro cogeneration was verified. Thermal cracking experiments were conducted about woody pellets in the temperature range from 500 to 700 degree Celsius. Then, the gas generation rate, the calorific value and cold gas efficiency of the gas were measured. Next, Bio-MCFC-CGS which system is constructed from biomass pyrolysis gasification system and MCFC cogeneration system running on its biogas was proposed and a simple prediction model about performance of MCFC cogeneration system was developed in order to examine feasibilities of those pyrolysis gases as a fuel. As results, it was revealed that the calorific values of the pyrolysis gases are about 14 to 19 MJ/Nm^3, and become 1/3 to 1/2 than that of town gas(13A). Furthermore, it turned out that the power generation efficiencies become lower when those pyrolysis gases were used as a fuel. But, it turned out that the total efficiencies are almost same to the case of town gas also.
2010-06-26