報告書番号

V12014

タイトル（和文）

ジャトロファ燃料油のディーゼルエンジンへの適用性評価

タイトル（英文）

Applicability evaluation of Jatropha oil for use in diesel engine

概要 （図表や脚注は「報告書全文」に掲載しております）

僻地・離島のディーゼル発電用燃料として期待されるジャトロファ油（BDF,JCO)について、小型ディーゼルエンジンから成る燃料性能評価装置を試作し、燃料適性を評価した。BDF、JCOの燃料特性および排ガス特性は、概ね軽油と遜色無いことが確認された。しかし50時間の連続運転試験では、JCOは9時間でエンジン始動不能となり、また、BDFについても長時間の運転により動作不安定となることが確認された。こうした不具合は燃料の動粘度、曇り点、流動点に起因するもので、ジャトロファ油のディーゼルエンジン燃料への適用に当たっては、粘性および低温特性の制御が重要になると考えられた。

概要 （英文）

Bio-fuel oil, especially Jatropha oil without competing with food production, is very useful as a fuel for diesel power plants in remote areas and islands. A fuel evaluation device composed of a small diesel engine, powder clutch and control and analytical system was assembled, and the fuel suitability of Jatropha oil fuel was examined.
Under the certain condition of a constant rotational speed, though the maximum output of bio diesel fuel (BDF) and Jatropha crude oil (JCO) remained in 85% of diesel oil, a significant difference was not observed in the exhaust gas temperature and fuel consumption rate between three types of fuel. The exhaust gas property showed no significant difference among them, although the CO concentration of JCO was slightly higher than that of diesel fuel. As a result of the cumulative running test for 50 hours to evaluate the continuous driving performance of the fuel, JCO was found impossible to start the engine after about 9 hours. The cause of this was the impermeable fuel injection valve and fuel filter from the high kinematic viscosity. On the other hand, in the case of BDF, the engine operation was unstable in about 40 hours by the non-suitability of its low-temperature characteristics. When Jatropha oil is applied to the diesel engine fuel, it is important to control the viscosity and low temperature properties.

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