Positive Valve Overlap as an Effective Conversion Energy System Using Biodiesel

Advances in Science and Technology Pub Date : 2024-03-15 DOI:10.4028/p-p68nva

Alpha Chukwumela Ajie, M. Ojapah, O. Diemuodeke

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Abstract

Biodiesel, with the potential to reduce emissions, is an attractive source of renewable energy in the transportation sector, which supports blending of diverse sources such as soybean oil, coconut oil, groundnut oil, palm oil and waste cooking oil. This study presents an analysis of using positive valve overlap of 32 degrees on the performance and emission of a diesel engine fired by biodiesel from two sources (waste cooking oil biodiesel and palm oil biodiesel). The waste cooking oil (WC) and palm oil (PO) biodiesel were blended with diesel fuel in varying proportion of B5, B10, B15, B20, B50, B85, B100. A 2-cylinder diesel engine model was created in Ricardo Wave software environment where simulations were conducted to evaluate brake specific fuel consumption, brake thermal efficiency, brake torque, exhaust gas temperature, CO, HC, and NOx emission. Performance results shows that at 1200 rpm, brake specific fuel consumption of 0.28798 kg/kWh for B100 and 0.27895 kg/kWh for PO100, brake thermal efficiency of 32.55% for B100 and 32.66% for PO100, and brake torque of 33.51N.m for B100 and 34.60 N.m for PO100. Emission results shows that CO emission of 15.10 ppm for B100 and 18.03 ppm for PO100, HC of 45.36ppm for B100 and 45.24 ppm for PO100; NOx of 154.03 ppm for B100 and 167.53 ppm for PO100. The implication is that the palm oil derived biodiesel uses less fuel and produces more brake power and brake torque as compared to waste cooking oil biodiesel. Conversely, emission results show that the palm oil derived biodiesel produces more emissions than waste cooking oil biodiesel.

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利用生物柴油将正阀重叠作为一种有效的转换能源系统

生物柴油具有减少废气排放的潜力，是交通领域一种极具吸引力的可再生能源，它支持混合多种来源的生物柴油，如大豆油、椰子油、花生油、棕榈油和废弃食用油。本研究分析了使用正气门重叠 32 度对使用两种来源生物柴油（废食用油生物柴油和棕榈油生物柴油）的柴油发动机的性能和排放的影响。废食用油（WC）和棕榈油（PO）生物柴油与柴油的混合比例分别为 B5、B10、B15、B20、B50、B85 和 B100。在 Ricardo Wave 软件环境中创建了一个双缸柴油发动机模型，并对其进行了模拟，以评估制动比油耗、制动热效率、制动扭矩、废气温度、CO、HC 和 NOx 排放。性能结果表明，在转速为 1200 rpm 时，B100 的制动比油耗为 0.28798 kg/kWh，PO100 的制动比油耗为 0.27895 kg/kWh；B100 的制动热效率为 32.55%，PO100 的制动热效率为 32.66%；B100 的制动扭矩为 33.51 N.m，PO100 的制动扭矩为 34.60 N.m。排放结果显示，B100 的 CO 排放量为 15.10 ppm，PO100 为 18.03 ppm；B100 的 HC 排放量为 45.36ppm，PO100 为 45.24ppm；B100 的 NOx 排放量为 154.03 ppm，PO100 为 167.53 ppm。这表明，与废食用油生物柴油相比，棕榈油衍生生物柴油使用的燃料更少，产生的制动功率和制动扭矩更大。相反，排放结果表明，棕榈油衍生生物柴油比废弃食用油生物柴油产生更多的排放。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Advances in Science and Technology

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