Effects of compression ratios on performance and emissions of diesel engine fuelled with Pilliostigma Thonningii.

This paper presents a comparative performance study with the standardized emission results of a controlled output of 7.4 KW, a stand-alone diesel engine equipped with biodiesel (B100) and diesel fuel. Biodiesel was used in this study is produced from transesterification-processed Pilliostigma Thonningii (PT) oil. The tests were performed at full load for different compression ratios of 18:1, 19:1, 20: 1. Impact of these compression ratios affecting the performance parameters like brakes thermal efficiency, BSFC and emissions such as CO, CO2, HC, NOx and Smoke. The compression ratio that provides better performance and less emission have been identified. The results show higher break thermal efficiency, reduced fuel consumption and a growing trend in CO2 and NOx emissions. [ABSTRACT FROM AUTHOR]