압축비 조절기구가 부착된단기통 디젤엔진에 대한 BDF의 적용

초록

An experimental study on engine performance parameters and emission gas characteristics for bio-diesel fuels (BDF's) was performed by using of a specific engine; the type of single-cylinder, four-stroke, water-cooled diesel engine with variable compression ratio adjustment mechanism (the model Farryman A30 marine, TQ, UK). Specific fuel consumptions (SFC) and soot tendency (smoke %) for various fuel and/or operation conditions were also examined. The BDF's used were prepared BD20 and BD100 together with the commercial diesel fuel(DF) for reference. The established conditions for experiment were 12：1, 14：1, 16：1 and 18：1 for compression ratio(CR), and 1000, 1500, 2000 and 2500rpm for engine speed. It was found that SFC of BDF's is increased 1.3～3.7% compared with DF according to the rpm's; for the smoke %, BDF's value is reduced significantly up to max. 45.7% in comparison to that of DF; and while NOx is increased amazingly up to max. 38%, which is too much than the previous results of around 12.0%. Also, it does not seem that the engine's power output remains changed significantly according to the fuels used.

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