Author(s): Dr. Jeyalakshmi P and Dr. Nithyanandam C

Abstract: In this article, a four-stroke, single-cylinder, direct injection, water-cooled diesel engine's performance, combustion, and emissions are computed using the influence of raw Paradise seed oil (PSO). In this investigation, several substances were used: diesel, PSO 10 (10% PSO + 90% diesel), PSO 20, PSO 40, PSO 60, and PSO 100 (100% PSO). The experiment was performed with four loading conditions such as 0, 1.75, 3.5, and 5 kW, a constant engine speed of 1500 rpm, and a compression ratio of 17.5:1. Investigations proved that without engine modifications, a CI engine may operate on raw oil blends adequately. The results indicated that with higher blends, the result was some loss of performance and a lack of combustion. As compared to diesel, the results indicate that at higher loads, brake specific energy consumption (BSEC) increased by 4-9%, and brake thermal efficiency (BTE) reduced by 4-9% for PSO blends. Considering PSO and its diesel mixtures to diesel, both of them reduced cumulative heat release rate (CHRR) by 1.8-15.7 percent and a net heat release rate (NHRR) by 15-48 percent. PSO mixtures slightly shoot the emissions of hydrocarbons and reduced nitrogen oxide emissions by approximately 20 percent compared to diesel fuel.

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