First and Second Law Analyses of Conventional and Advanced Combustion Modes

The objective of this paper was to perform first and second law analyses of conventional and advanced combustion modes. The data to be analyzed came from two computer models. The first model simulated a modified Mercedes diesel engine operating in the conventional mode, and the second simulated operation in the advanced combustion mode.

Each model was constructed using geometric measurements from the experimental engine setup. Experimental data were used to correlate the output from the models with that of the actual engine. Once each model was deemed valid, its output was subjected to a first and second law analysis.

In the conventional combustion case, 14.27 % of the fuel's availability energy is affiliated with heat transfer, 17.24 % with flow processes, 34.13 % with work, and 34.36 % is destroyed. In the advanced combustion case, 18.39 % of the fuel's availability energy is affiliated with heat transfer, 13.72 % with flow processes, 38.99 % with work, and 28.9 % is destroyed.