Experimental study of the performance of and emissions of low-speed diesel engine using various bio diesel blends at variable speed conditions: (Part I)

The production of biodiesel from waste cooking oil to partially substitute diesel fuel to solver two problems: environmental pollution and energy shortage. The purpose of this study is to experimentally investigate the performance and emission of compression ignition engine using biodiesel extracted from waste cooking oils (WCO), such as (falafel frying oil, origin from palm oil. chicken frying oil; origin from soybean oil), and fresh soybean oil, and olive oil). After prepare biodiesel from WCO and fresh oils, was blended with pure diesel in two percentage are B20 (20% biodiesel from each type, 80% pure diesel), B10 (10% biodiesel from each type, 90% pure diesel). The biodiesel blends were used as an alternative fuel for diesel engine. After that, they were compared to pure diesel B00 (0% biodiesel, 100%pure diesel). The study investigates engine performance and emissions at constant load (2 kW) variable speed from (400-900 rpm). For engine performance, (brake power, brake specific fuel consumption, brake thermal efficiency) were analyzed. In addition, (CO2, O2, exhaust gas temperatures to indicate NOx) were analyzed. The results, shows that pure diesel produces higher brake power (BP) than all biodiesel blends. The highest value for brake specific fuel consumption (BSFC) is for pure diesel. The highest value for brake thermal efficiency BTE is for B10-S (10% biodiesel from soybeans oil, 90% pure diesel) is equal 27.6%. The B10-S produce highest value from NOx. Also, pure diesel produces higher CO2 emissions than all biodiesel blends. All biodiesel blends produce higher O2 emissions than pure diesel.