廢食用油加氫對直噴式柴油引擎性能、廢氣排放和燃燒特性之研究

A Study on Engine Performance,Exhaust Gas Emission and Combustion Characteristics of Biodiesel Fuel with Hydrogen in a DI Diesel Engine

陳玉麟(Yu-Lin Chen)

指導教授 ： 林百福

國立臺北科技大學/機電學院/車輛工程系所/碩士(2010年)

摘要

本研究利用WOME生質柴油和WOME+ H2的混合燃料之兩種燃料進行實驗，在不改變單缸直噴式柴油引擎的本體結構與設計參數的原則下，在進氣歧管內添加2 l/min的氫氣與WOME生質柴油混合後進行燃燒，針對兩種燃料之能源效率、廢氣排放、排氣溫度以及燃燒特性等差異，評估氫氣添加於WOME生質柴油之效益。實驗結果顯示，在三種指定引擎轉速之各負荷下，WOME+ H2燃料之能源效率比WOME燃料的總平均值高約3.89％；而WOME+ H2燃料在着火延遲時期與預混合燃燒結束時間均較為提前，使得Smoke和HC濃度值的表現上，分別較WOME燃料的總平均值低約13.57％和9.16％；又由於初期預混合燃燒時期較為提前，致NOx濃度值比WOME燃料的總平均值高約8.54％；WOME+ H2燃料於後燃時期雖燃燒溫度低，但H2燃料熱值高，因此EGT值較WOME燃料高約1.65％。

關鍵字

生質柴油 ； 廢食用油甲酯 ； 氫氣 ； 直噴式柴油引擎 ； 引擎性能 ； 廢氣排放 ； 燃燒特性

並列摘要

WOME and WOME+H2 are the blended fuels operated in this study without any modifying the body structure and design parameters of the single-cylinder direct injection diesel engine. Extra air mass, H2, was injected into intake manifold by 2 ℓ/min stably for blending with WOME before burning on. And the differences of energy efficiency, exhaust gas emissions, exhaust temperature as well as combustion characteristics were analyzed to evaluate the performance which is H2 blended with WOME. The experimental results demonstrated that the energy efficiency of WOME+H2 in total average value is higher than WOME about 3.89% at three specified engine loads and speeds. Moreover, ignition delay period and premixed combustion phase of WOME+H2 are more advanced, so the concentrations of smoke and HC in total average value are lower than WOME about 13.57% and 9.16%, respectively. Besides, due to more advanced at initial premixed combustion phase, NOx concentration in total average value is higher than WOME about 8.54%. Although WOME+H2 in late combustion phase is low burning temperature, H2 has characteristic of high heat value. Thus its EGT value is higher than WOME about 1.65%.

並列關鍵字

Bio-Diesel ； Waste Fried Oil Methyl Ester ； Hydrogen ； DI Diesel Engine ； Engine Performance ； Exhaust Gas Emission ； Combustion Characteristic

參考文獻

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[30] 顏子傑，廢食用油甲酯使用在直噴式柴油引擎之研究，碩士論文，國立台北科技大學車輛工程系碩士班，台北，2006。

[2] Christopher A.Sharp, “Characterization of Biodiesel Exhaust Emission” for EPA211(b), January 1998.

[3] National Biodiesel Board，“hat is Biodiesol”，http//www.biodiesel.org/fuel fact sheet.htm, 2000.

[5] Suzuki, Y. (1982) On Hydrogen as Fuel Gas. International Journal of Hydrogen Energy7: 227-230.