J1303036774.pdf (original) (raw)

In this paper, a single cylinder, 4 stroke diesel engine was modified to operate as a dual fuel engine using biogas as the primary fuel and diesel as the pilot fuel. The engine was operated at different compression ratios; 14:1, 16:1 and 18:1 and the performance and emission characteristics were studied. Brake thermal efficiency and mechanical efficiency were found to be highest at compression ratio of 18:1.Brake specific fuel consumption was also found to be lowest at compression ratio of 18:1. Engine exhaust gases were measures for different compression ratios. It was found that NOx and CO 2 emission increased with the increase in compression ratio and was highest at compression ratio of 18:1. HC and CO emissions reduced with increase in compression ratio and were highest at the compression ratio of 14:1. This study found that at compression ratio of 18:1, the dual fuel engine had superior performance and emission characteristics.