綠色柴油對柴油引擎性能與排污改善分析探討

The study of a diesel engine performance and emissions improvement with green diesel additions

蘇脩聖(Siou-Sheng Su) ； 賴銘彬(Ming-Pin Lai) ； 林克衛(Ke-Wei Lin) ； 陳偉仁(Wei-Ren Chen)

《燃燒季刊》 97期 (2017/05) Pp. 59-71

https://doi.org/10.30041/CQ.201705_(97).0006

摘要

生質燃油是一種具有發展潛力的替代燃料，國際間以生質柴油(Biodiesel)與綠色柴油(Green diesel)兩種為主要的發展方向，其可添加於傳統柴油中或直接作為燃料使用。研究目的在於透過實驗方式，探討化石柴油中添加2、5%體積百分比的生質燃油後對引擎性能與排放的影響。實驗結果得知，添加綠色柴油後有提升引擎輸出扭力與功率的現象。透過換算得知，在綠色柴油添加比例為5%時，最大扭力與功率的升幅各別為3.2 與3.4%。引擎最大輸出扭力與輸出功率之操作點下(1700 RPM, 3200 RPM)，制動燃油消耗率之最大降幅各別為1.5 與1.3%。在FTP 暫態測試程序條件得知，兩種燃油的添加可降低引擎廢氣中氮氧化物與粒狀污染物的生成。其中以綠色柴油的降幅較為明顯，G2 與G5 可降低36-40.4%的粒狀污染物排放，而氮氧化物會降低約9.02-10.27%的排放量。引擎轉速1200-2200 RPM 之間，綠色柴油添加比例為5%時，具有最低制動燃油消耗表現與最佳的熱效率提升幅度(0.8-1.82%)。透過本研究可知，綠色柴油添加於化石柴油中可以提高引擎輸出扭力與功率，並改善粒狀污染物的排放與降低制動燃油消耗率。

關鍵字

綠色柴油 ； 引擎性能 ； 粒狀污染物 ； 污染排放

並列摘要

Renewable biofuels such as biodiesel (FAME) and green diesel (HVO) are an internationally perceived and developed as potential alternative fuels that can be either added in traditional diesel or used directly for compression ignition engine. The main objective of this study is examining the characteristic improvement of engine performance, emissions and thermal efficiency of biofuel additive content (Biodiesel and Green diesel, 2 and 5 wt.%) with petro-diesel. Results of the experiment show that the peak values of torque and power were increased to 3.2 and 3.4% with Green diesel additive. Furthermore, nitrogen oxide and particulate matter emissions were decreased with biofuel additive while the NOX and PM emission were decreased to 9.02% and 40.2%. The brake thermal efficiency raised 0.8-1.82%, and the optimum BSFC (214.25 g/kWh) were performed between 1200 and 2200 RPM. Since the heating value per mass of green diesel is higher, brake specific fuel consumption of engine fuel was lower with green diesel (G2: 1.5% and G5: 1.3%) than with the petro-diesel. In fact, as green diesel does not contain aromatic compounds, it also helps reduce PM, unburned HC and CO emissions. Furthermore, the high cetane number of alternative fuel leads to a decreased ignition delay; therefore, reduces the potentiality of PM emission. Hence, the HVO could be an alternative fuel for CI engine than other biofuel under a properly additive ratio.

並列關鍵字

Green diesel ； Engine performance ； Particulate matter