Browse Publications Technical Papers 2020-28-0412
2020-09-25

Experimental Study on Influence of Iron Oxide Nano particles on Characteristics of a Low Heat Rejection Diesel Engine Operated with Methyl Esters of Waste Cooking Oil 2020-28-0412

In this study, an attempt was made to investigate the influence of Iron Oxide Nano particle on the performance, emission and combustion characteristics of Low Heat Rejection (LHR) diesel engine operated with methyl esters of Waste Cooking Oil (WCOME). In the first phase of the work, single cylinder, direct injection diesel engine test rig was developed and tested for its baseline readings with diesel at different power output. In the second phase of the work, test engine was operated with WCOME and tested for its characteristics. Test engine was modified to operate in the LHR mode in the third phase of the work. Engine's cylinder head, valves and piston crown were coated with lower thermal conductivity materials namely, 200 microns of Yttrium Stabilized Zirconia & 100 microns of Nickel, Chromium and aluminium alloys. LHR engine was tested with WCOME and tested for its characteristics in the fourth phase. Finally WCOME was blended with 50 ppm of iron oxide nano particle (WCOMEN) and tested for its performance in LHR engine and results were compared. It comes to know that, inclusion of the Iron Oxide Nano particle has significantly improved the stability as well as the viscosity of the WCOME. This has been clearly reflected in the engine's characteristics operated with WCOMEN. BTE of the LHR engine operated with WCOMEN was found as 30% which is quite higher than WCOME and near to diesel fuel operated with unmodified diesel engine. All the carbon based emissions were found to be reduced with WCOMEN in the LHR mode. It could be due to the combination of thermal barrier coating and presence of iron oxide nano particles which ensures complete combustion of injected WCOMEN. However, it is interesting to note that, even with LHR mode, Oxides of Nitrogen Emission was on the higher side with WCOMEN. Thus it can be concluded that, diesel engine can be operated with WCOMEN in LHR mode for better performance and emission characteristics with a penalty of increased oxides of nitrogen emission. Finally, inclusion of Iron Oxide nano particles has significant impact in the flow properties of WCOME and helped to improve the engine's characteristics. Key Word: Diesel Engine, Waste Cooking Oil, Methyl Ester, Low Heat Rejection and Iron Oxide Nano particles

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