Comparative study of I.C. engine performance using different fuels

Abstract

Comparative study of I.C. engine using different fuels is the test of engine performances for different properties of engine as well as comparing these properties using different fuels. The processes involved measuring exhaust temperature, torque, R.P.M. of a small engine with the help of a small engine test bed (TD110-115) and instrumentation unit (TD114). Applying the output value from the previous method and with the help of mathematical formula brake power, specific fuel consumption, fuel mass flow rate, and brake thermal efficiency can be measured. A comparative analysis is introduced by repeating the last two steps to obtain the data analysis table and plotting the curves with the respective values. As conventional fuel petrol, octane and diesel were the common selections. But comparative analysis was aspired to comprehensiveness with the introduction of alternative fuels. The relative analysis with alternate fuels like bio-ethanol came out as a tremendous significance to our whole endeavor. Running the same engine with the same set up instrumentation but different fuels, was an ultimate analysis not only for the engine performance test but also a solution of best possible fuel for the engine. In our experiment we got the maximum torque (7Nm), brake power (2.31kW) and specific fuel consumption at maximum torque speed (418.18 g/kWh) for diesel that’s why it is used for high load. For small capacity engine like automotive vehicle bio-ethanol is a much better choice than petrol as it has lower exhaust temperature (300°C max) and higher brake thermal efficiency(24%). CNG is cost effective and good for environment but it gave the maximum exhaust temperature (490°C max) and less torque (5.8 Nm max) and brake power (1.98 kW max). Thus, our comparative study for output torque, efficiency, temperature was an indisputable approach for our targeted data analysis and fuel solution.