Effect of load level on the performance of a biodiesel run dual fuel CI engine using second law analysis

With the continuous depletion of petroleum fuel and the contribution of these fuels to pollute the environment, use of petroleum-based fuels is now widely recognized as unsustainable. A huge research is going on through out the world to search for suitable and environmental friendly alternative sources of these fossil fuels. The demand for biodiesel as one of the alternative sources of fuel is increased very rapidly. The performance results obtained from a single cylinder Compression Ignition (CI) engine operating on diesel and biodiesel-diesel dual fuel mode are presented in this paper. The dual fuel performance has been compared with neat diesel at various load level varying from 1 kg to 10 kg with almost steady engine speed of 1500 rpm and compression ratio of 17.5. The second law analysis also called `Exergy´ analysis has been performed for both diesel and dual fuel mode at different loads. The second law analysis includes brake work, coolant heat transfer, exhaust losses and exergy efficiency. The data are recorded using a computerized engine test rig. Results indicates that within the range of parameters studied here, it is possible to achieve a maximum of about 20% diesel substitution using dual fuel mode under same working condition and without any engine modification.