Effective Utilization of Waste Cooking Oil as a fuel in Compression Ignition Engine employing different techniques- an experimental investigation.
2022-01-0625
03/29/2022
- Event
- Content
- Environmental pollution and fossil fuel depletion are the major concerns in the present situation. Researchers have tried various biofuels for compression ignition (CI) engine to overcome these problems. Waste cooking oil (WCO) was found suitable alternate fuel for CI engine because of their huge availability, biofuel, economically cheaper and renewable fuel. However, WCO has higher density, viscosity, poor volatility, poor air-fuel mixing led to inferior combustion in CI engine. Due to inferior combustion, engine performance was poor, engine exhaust emissions such as hydrocarbon, carbon monoxide and smoke were higher. In this present experimental work, different techniques were adopted to improve the performance of CI engine using WCO as the base fuel. WCO was collected in bulk from a restaurant and used for the entire research work. A single cylinder, four stroke, direct injection, water cooled CI engine was used for this research work. In the first phase of work, experiments were conducted using diesel and WCO as fuels to measure the performance, combustion and emission parameters at different load conditions and kept as baseline data. WCO was converted into waste cooking oil biodiesel (WCOB) through transesterification process and used as a fuel in the second phase of this work. In the third phase of work, Zinc oxide nanofluids were prepared by wet chemical method in four mass concentrations and blended with WCOB. Experiments were conducted using zinc oxide nanofluids blended WCOB in different load conditions. Finally, all the experimental outputs from various methods were compared and analysed. It was observed that WCO produced lower brake thermal efficiency (BTE) than that of diesel. The emissions such as Hydrocarbon (HC), Carbon monoxide (CO) were found higher for WCO than diesel. Nitric Oxide (NO) emission was found lower for WCO. Smoke levels were found higher for WCO. The cylinder peak pressure (CPP), maximum rate of pressure rise (MRPR) and heat release rate (HRR) were found lower for WCO as compared to diesel. The ignition delay (ID) and combustion duration (CD) were found longer for WCO. In the second phase, BTE was improved while using WCOB as compared to WCO. HC, CO emissions and smoke opacity were reduced. But NO was found increased as compared to WCO. The CPP, MRPR and HRR with WCOB were found higher than WCO. The ID and CD were found lower for WCOB as compared to WCO. It was noted that BTE was improved further while using Zinc oxide nanofluids blended with WCOB. Emissions and smoke were drastically reduced as compared to WCOB and WCO. It was found that wet chemical method was the new method for preparing ZnO nanofluids with higher stability. From the experimental outputs of various methods, it is concluded that WCO could be effectively used as an alternate fuel in CI engine by converting it into WCOB and blended with zinc oxide nanofluids.
- Citation
- Velmurugan, R., Mayakrishnan, J., and Elumalai, S., "Effective Utilization of Waste Cooking Oil as a fuel in Compression Ignition Engine employing different techniques- an experimental investigation.," SAE Technical Paper 2022-01-0625, 2022, .