著者
金子 仁 福田 厳 津金 正典 坂本 研也
出版者
公益社団法人 日本マリンエンジニアリング学会
雑誌
マリンエンジニアリング (ISSN:13461427)
巻号頁・発行日
vol.55, no.1, pp.120-129, 2020-01-01 (Released:2020-01-29)
参考文献数
6

Japan is a country prone to many natural disasters. There has been a further demand for Japan to improve the reliability of power supply than before the Great East Japan Earthquake. Given the topography of the country, the authors think that the Earthquake taught us how effective ship-to-shore power supply systems are in improving the reliability. This study is to estimate how much power can be supplied from coastal cargo ships moored at Tokyo Port. For calculation purpose, the authors used ship specification data listed in the annual "Register of Ships" published by the Japan Shipping Exchange, Inc. and port mooring facility specification data on the Tokyo Port Facilities List. The result of the calculation showed that 230 moored ships at the port can provide up to 197,000kW, which accounts for 23% of the total amount of power that can be supplied from 2,314 registered coastal cargo ships in Japan.
著者
小松 源一 河合 彊 神吉 義明
出版者
公益社団法人 日本マリンエンジニアリング学会
雑誌
日本舶用機関学会誌 (ISSN:03883051)
巻号頁・発行日
vol.16, no.6, pp.508-514, 1981 (Released:2010-05-31)
参考文献数
7

In the marine Diesel engine, there still remains problems about the relation between thermal loads of engines and the indicated values of thermometer. Therefore, the exact measurement of exhaust gas temperature has expected up to the present. The indicated value is mainly affected by two factors which are the measurement factors of exhaust gas temperature and the gas flow in the exhaust pipe, and it is still not clear how these two factors affect the indicated value.In this study the measurement factors affecting on the indicated value were examined, using two kinds of steady state exhaust gases in the duct and the thermometer well which was filled several thermocouples up the axial surface. Owing to the results, the temperature of the tip of well usually is different from gas temperature, even if the longitudinal length of well takes enough. Therefore, it seems that it is not suitable to make the reading gas temperature, the correcting of the reading is necessary to take account thermal characteristics of well in the duct.
著者
三原 悠 浅野 一朗 段 智久 岡村 秀雄 松村 千里 羽賀 雄紀 中坪 良平
出版者
公益社団法人 日本マリンエンジニアリング学会
雑誌
マリンエンジニアリング (ISSN:13461427)
巻号頁・発行日
vol.56, no.3, pp.473-483, 2021

<p>  As a way to improve the combustion characteristics of wood tar which is highly viscous and flame retardant, the authors blended it with liquefied dimethyl ether (DME), which can improve fuel fluidity, ignitability and spray atomization. Moreover, heavy fuel oil (bunker-c oil) was added to increase the heating value of this fuel sample. The sample, which has the blending ratio of 35 % wood tar, 30% DME and 35% bunker-c by weight, was used in a combustion test with a three-cylinder in-direct injection diesel engine. Additionally, the authors also investigated particulate matter (PM) produced after burning four samples that mixed liquefied DME with flame retardant fuels in the same engine to analyze its environmental and biological impacts. The four samples prepared for the experiment were (1) 70% distillate oil (bunker-a) and 30% DME; (2) 85% bunker-c and 15% DME; (3) 70% bunker-c and 30% DME; (4) 35 % bunker-c, 30% DME and 35% wood tar.</p><p>  The results of the engine test suggested the possibility that wood tar could become more combustible by optimizing the flow rate of fuel and the blend ratio of liquefied DME and bunker-c. In the (4) case, PM showed no high mutagenic potentials and there were lower concentrations of such inorganic substances as vanadium and nickel. Polycyclic aromatic hydrocarbons (PAHs) concentrations in PM decreased by blending liquefied DME with bunker-c, whereas did not decrease for the wood tar.</p>