AN EXPERIMENTAL INVESTIGATION OF MULTI-CYLINDER CONVENTIONAL CI ENGINE USING MADHUCA INDICA OIL AS FUEL

The present work is mainly discussed with a qualitative study of engine’s significant characteristics fuelled with mahua bio-diesel & its different types of mixtures with neat diesel. The significant technical properties of various mixtures are tabulated. A 4-S multi-cylinder (6-Cylinder) DI conventional CI engine is used for the study under different speed modes. All types of characteristics for various mixtures are estimated in running the engine. Pure diesel is indicated by B-0 and pure mahua bio-diesel is represented by B-100. From the test results, it is found that B-25 gives almost the same BTE as B-0 at maximum load, compared to all the blends. The blend B-0 and B-25 give the least SFC of 0.332 and 0.268 kg/kWh at minimum speed (1200 rpm) and maximum speed (2400 rpm) at maximum load as contrasted to all mixtures. The B-100 gave 3.01% of NOx while related to B-0 @ lower speed

Effects of EGR rate on performance and emissions of a diesel power generator fueled by B7

This paper analyses the impacts of the application of an exhaust gas recirculation (EGR) system on the performance and emissions of a stationary, direct-injection diesel engine operating with diesel oil containing 7% biodiesel (B7). Experiments were carried out in a 49-kW diesel power generator with the adapted EGR system, and engine performance and emissions were evaluated for different load and EGR settings. The results were compared with the engine operating with its original configuration without the EGR system, and revealed a reduction of peak cylinder pressure and fuel conversion efficiency, mainly at high engine loads. The use of EGR caused opposite effects on carbon dioxide (CO2), carbon monoxide (CO) and total hydrocarbons (THC) emissions, depending on load and EGR rate, showing an increase in most situations. The application of EGR consistently reduced oxides of nitrogen (NOX) emissions, reaching a maximum reduction close to 30%. In general, the use of EGR increased CO2, CO and THC emissions at high loads. The use of 7.5% EGR was found to be at an adequate rate to simultaneously reduce CO, THC and NOX emissions at low and moderate loads, without major penalties on CO2 emissions and engine performance

An experimental investigation of performance, combustion and emission characteristics of mahua (Madhuca Indica) oil methyl ester on four-stroke direct injection diesel engine

42-50This paper is mainly concerned with an experimental investigation to study the diesel engine performance, combustion and emission characteristics using mahua (Madhuca Indica) biodiesel (mahua oil methyl ester) and its blend in different volumetric proportions with diesel. To start with, the thermo-physical properties of all the fuel blends are evaluated. A four stroke tangentially vertical (TV) single cylinder direct injection (DI) diesel engine with eddy current dynamometer is used for the study under various load conditions. Combustion and emission characteristics for different blends are evaluated in running the engine under steady state conditions. Neat diesel is called B0 and neat (mahua oil methyl ester) biodiesel is called B100. From the experiments, it is seen that B25 gives almost the same brake thermal efficiency as B0 at full load condition, compared to other blends. The blend B0 and B25 give the lowest specific fuel consumption of 0.56 and 0.27 kg/kW.h at no load and full load as compared to all other blends. At no load B100 gives the lowest NOx emission which is 2.52% less compared to B0