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Title: Studies on the environmental emission and performance of a single cylinder CI engine with enhanced intake air oxygen combustion
Authors: Dinesha, P.
Nayak, V.
Shankar, K.S.
Mohanan, P.
Issue Date: 2014
Citation: Biofuels, 2014, Vol.5, 6, pp.713-721
Abstract: The present investigation deals with the combustion, performance, and emission characteristics of cardanol based B20M10 (20% cardanol + 70% diesel + 10% methanol) and B30M10 (30% cardanol + 60% diesel + 10% methanol) biofuel blends. The experiments are conducted on a four-stroke single cylinder diesel engine with 27.5 deg. bTDC standard ignition timing and 180 bar injection pressure at 25%, 50%, 75%, and 100% full load conditions. The experiments have been carried out with B30M10 biofuel blends and the results are compared with B20M10 and baseline diesel fuel. The supply of additional oxygen to the intake air is at a flow rate of 3%, 5%, and 7% by weight. With the increase in concentration of intake air oxygen, CO, HC, and smoke emissions decreases, whereas brake thermal efficiency (BTE) and NOx emission are considerably increased when compared to B20M10 and B30M10 without oxygen enrichment. The BTE of blended fuel B30M10 with 7% oxygen enrichment intake air reaches the efficiency of B20M10. However, compared to diesel, it decreases about 1.5% by value at 75% full load condition. CO emission reduces to 40.6% and 26.83%, and HC emission reduces to 14% and 10.52% for B30M10 with 7% of oxygen enrichment when compared to B30M10 and B20M10 at 100% full load condition, respectively. Smoke emission decreases drastically with the increment in oxygen concentration of intake air. 2015 Taylor & Francis.
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