著者

山崎 由大 金子 成彦

出版者

一般社団法人 日本燃焼学会

雑誌

日本燃焼学会誌 (ISSN:13471864)

巻号頁・発行日

vol.49, no.150, pp.236-245, 2007 (Released:2018-03-20)

参考文献数

7

被引用文献数

2

著者

上杉 康登 山崎 由大 金子 成彦 疋田 孝幸 津村 雄一郎 水野 沙織

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.850, pp.16-00537-16-00537, 2017 (Released:2017-06-25)

参考文献数

15

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To predict the combustion characteristic of auto ignition combustion in internal combustion engines, it is necessary to consider the inhomogeneity of the fuel, EGR and air in the mixture. In this research, a PDF (Probability Density Function) combustion model considering the influence of the inhomogeneity of mixture on the auto ignition combustion is developed. In our approach, the PDF of the injected fuel and the EGR gas is predicted by two-zone turbulent mixing model and only the PDF at the top dead center of the combustion stroke is used to calculate combustion characteristic to realize the reasonable calculation time for the control system design tool. The prediction model was validated by comparing with the experimental result for various injection timings and EGR ratios. It found that the model can qualitatively predict the combustion characteristics with reasonable calculation time.

著者

山崎 由大

出版者

一般社団法人日本エネルギー学会

雑誌

日本エネルギー学会誌 = Journal of the Japan Institute of Energy (ISSN:09168753)

巻号頁・発行日

vol.84, no.12, pp.1019-1025, 2005-12-20

被引用文献数

5

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This report introduces five biomass gasification power generation plants in Europe, three nations, Switzerland, Austria and Germany, where the author visited November 2004. PYROFORCE in Switzerland used fixed bed gasification system with 200kW GE-Jenbacher gas engine. This gasification system promotes very little tar even as a fixed bed gasifier because of optimization of shape of reactor and airflow. Gussing in Austria uses internally circulating fluidized-bed gasification system. Characteristic of this system are to promote medium calorific gas because of using steam and to use combustion heat efficiently for gasification. This plant is equipped with 2000kW GE-Jenbacher gas engine. Electricity is sold for homes and factories, heat is supplied to regional heating system in the city. Future Energy GmbH and CHOREN GmbH in Germany operate the entrained bed gasification system. In Future Energy, there are three type entrained bed gasification systems for fuel types. CHOREN has established Carbo-V system with entrained bed with the charcoal fire pit. All of plants use woody biomass. Thus, the author thinks it difficult to transfer European techniques to Japan without modifications because of different surroundings. It is also needed to develop not alone technology, but policy to adopt biomass generation in Japan.

著者

菅野 雅信 赤石 誉幸 山崎 由大 金子 成彦

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. B編 (ISSN:03875016)

巻号頁・発行日

vol.76, no.763, pp.403-405, 2010-03-25

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To realize stable operation of microgrids, gas engines require to compensate load changes from demands and variation of other renewable energy devices. Then, prehension of load following capability is important in gas engines. In addition, when biomass gas is supplied to gas engines, effect of fuel component variation on dynamic characteristics must be investigated, because components of biomass gas depend on operating condition of gasification or raw material. This study proposed a dynamic simulation model of gas engine and estimated transient response to load changes. Load changes were sinusoidal wave, and bias value, amplitude and frequency of them were varied. As a result, the frequency has more influence on transient response than the bias value and the amplitude. When biomass gas is supplied to gas engines, transient response is worce than city gas over the frequency of 0.1Hz.