碩士 / 國立雲林科技大學 / 機械工程系碩士班 / 95 / This research is targeted at a YAMAHA ME200F 3-cylinder direct injection diesel engine. The various fuels are tested including the commercial diesel fuel mixed with methanol, ethanol, and bio-diesel fuel. Also the grade A marine fishing fuel is mixed with bio-diesel fuel and used in the test. The total fuel’s heating value is maintained the same under the same engine operating conditions when the various fuels are tested. The research is categorized into three parts as follows.
The first tests apply two diesel fuel additives (10% methanol and 10% ethanol) on the engine and the engine performance and exhaust emissions results are compared to the baseline (pure diesel fuel) case. Results show that the NOX emissions can be reduced 44% maximally; the HC emission can be reduced up to 52%; the CO emission can be raised by 68%; the engine torque is increased by 19% averagely; and the BSEC is down by average 7.81%. Thus, the alcohol additives can be applied in the diesel fuel to upgrade the engine performance.
The 2nd tests apply the commercial diesel fuel and grade A marine fishing fuel mixed with 20% bio-diesel fuel. Results show that the NOX emissions can be reduced 42.63% maximally; the HC emission can be reduced by 29.32%; the CO emission can be increased by 88%; the engine torque can be increased by 32.89% for the diesel-bio diesel case and decreased by 10.53% for the fishing oil-bio diesel case; the BSEC is reduced by 7.54% for the diesel-bio case and increased by 4.89% for the fishing oil-bio diesel case. In general the bio-diesel fuel can improve the diesel engine performance while the fishing oil can degrade the engine performance.
The 3rd tests study the friction corrosion analyses under 500 hours heavy duty operating on the engine under the regular fuel and bio-diesel mixing cases. Results show that the diesel spray’s SMD after endurance test is increased no matter what fuel is applied. The B20 bio-diesel fuel mixture has larger SMD than the regular diesel fuel. For the injection parts’ frictional corrosion test the B20 fuel creates unsatisfied results so that the B20 fuel has less fuel lubricity than the regular fuel.
Upon the analyses of testing results, it is found that the bio-diesel fuel can improve the engine emissions while the lubricity is on the opposite trend. However, the alcohol additives can only improve the engine performance but can not improve the emissions.
| Identifer | oai:union.ndltd.org:TW/095YUNT5489049 |
| Date | January 2007 |
| Creators | Jian-Zhi Chen, 陳建志 |
| Contributors | Kuo-Liang Shih, 施國亮 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 69 |
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