소형 어선용 디젤기관의 운전조건과 부탄올 혼합유의 배기 배출물 특성에 관한 연구
A study on exhaust emission characteristics according to operating conditions and butanol blended fuels in a small diesel engine for fishing vessel
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초록
본 연구에서는 경유와 부탄올을 혼합한 혼합유를 디젤기관의 연료유로 사용하여, 기관회전수와 토크 등의 다양한 운전조건 변화에 따른 연소압력, 연료소비량, 공기비 및 배기가스 성분 등을 측정하였다. 그리고 이들 자료들을 이용하여 기관성능, 연소특성, NOx, CO2, CO 및 매연(Soot) 등의 배기배출물 특성들을 분석한 결과는 다음과 같다. 각 부하에서의 연료변환효율은 고정피치프로펠러법칙에 의해 결정된 기관회전수로 운전되었을 때 가장 높았으며, 30% 부탄올 혼합유를 제외한 다른 연료유들에서는 부하가 증가할수록 연료변환효율이 증가하였다. 매연농도 및 일산화탄소 배출률은 30% 혼합유를 사용한 고부하의 운전영역에서 높게 나타났다. 모든 연료유의 질소산화물 및 이산화탄소 배출률은 부하가 증가할수록 약간 낮게 나타났으며, 10% 및 20% 부탄올 혼합유의 질소산화물 배출률이 모든 부하에서 약간 높게 되었다.
Abstract
In this study, blending oils of diesel oil and butanol were used as fuel oil for diesel engine to measure combustion pressure, fuel consumption, air ratio and exhaust gas emission due to various operating conditions such as engine revolution and torque. Using these data, the results of analyzing the engine performance, combustion characteristics and exhaust emission characteristics such as NOx (nitrogen oxides), CO2 (carbon dioxide), CO (carbon monoxide) and soot were as follows. The fuel conversion efficiency at each load was highest when driven in the engine revolution determined by a fixed pitch propeller law. Except 30% butanol blending oil, fuel conversion efficiency of the other fuel oils increased as the load increased. Compared to diesel oil, using 10% and 20% butanol blending oil as fuel oil was advantageous in terms of thermal efficiency, but it did not have a significant impact on the reduction of exhaust gas emissions. On the other hand, future research is needed on the results of the 20% butanol blending oil showing lower or similar levels of smoke concentration and carbon monoxide emission rate other than those types of diesel oil.
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