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Investigations on Dual Fuel Reactivity Controlled Compression Ignition Engine using Alternative Fuels Produced from Waste Resources

Investigations on Dual Fuel Reactivity Controlled Compression Ignition Engine using Alternative Fuels Produced from Waste Resources

Date4th Jul 2022

Time03:00 PM

Venue Through Google Meet: https://meet.google.com/uai-zavy-rqv

PAST EVENT

Details

Reactivity Controlled Compression Ignition (RCCI) is a low-temperature combustion (LTC) strategy that utilizes port-injected low reactivity fuel (LRF) and direct-injected high reactivity fuel (HRF), resulting in increased thermal efficiency and low oxides of nitrogen (NOx) and particulate matter emissions. The present work explores the possibility of utilizing waste plastic oil (WPO) produced from municipal plastic wastes and waste cooking oil (WCO) biodiesel produced from used cooking oil as LRF and HRF, respectively, in RCCI mode. A single-cylinder light-duty diesel engine used for agricultural water pumping applications is modified to run in RCCI mode through proper intake and fuel injection systems modifications. Based on fuel characterization, gasoline-WPO blends and neat WPO are used as port-injected LRF, and diesel-WCO biodiesel blends and neat WCO biodiesel are used as direct-injected HRF fuels in RCCI. The premixed ratio and direct-injected fuel timings are optimized at each load condition to achieve maximum thermal efficiency within a stable LTC regime in RCCI. The engine could be operated across the entire load range in RCCI with the fuels produced from waste resources. The engine combustion, performance, and exhaust emissions with fuels from waste resources are compared with gasoline and diesel (G/D) as a port and direct-injected reference fuels. The results show that compared to G/D RCCI, engine brake thermal efficiency is increased across the entire load range with a maximum increase of 15% with fuels produced from waste resources. All the regulated pollutants are reduced with fuels produced from waste resources except NOx compared to G/D RCCI. In the next phase of experiments, a novel port-injected RCCI (PI-RCCI) is explored, wherein both LRF and HRF are injected into the intake port during the suction stroke to eliminate thermal and charge stratification effects. The engine load range was limited to 40% of the rated load in PI-RCCI with neat alternative fuels. Homogenous combustion of PI-RCCI results in significantly low unburned hydrocarbon and carbon monoxide emissions compared to conventional RCCI. In this seminar, I will discuss the reasons behind the obtained trends with alternative fuels produced from waste resources in conventional RCCI and PI-RCCI.

Speakers

Mr Arun Raj C (ME19S021)

Department of Mechanical Engineering