Performance and combustion study of a low heat rejection engine running with biogas–diethyl ether–diesel

Waste Disposal & Sustainable Energy Pub Date : 2023-11-14 DOI:10.1007/s42768-023-00167-x

Sanjaya K. Mishra, Premananda Pradhan, Shakti P. Jena

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Abstract

The present research focuses on addressing the faster depletion of fossil fuels and environmental pollution in addition to the energy crisis that hinders the progress of a nation. In the current research, waste banana leaves were considered as substrates for biogas production. Biogas is taken as the primary fuel in dual fuel (DF) operations to maximize possible diesel savings. The performance and combustion assessment were executed in a low heat rejection (LHR) engine using 5% diethyl ether by volume blended with diesel (5DEE) as pilot fuel. The combustion attributes of the engine reveal that the apex of net heat release rate (NHRR) curve retarded a bit as compared to apex of base result. The peak cylinder pressure was noted to be 6.19 MPa in the LHR engine running with 5DEE + biogas at 11.7° crank angle (CA) after top dead center (aTDC) compared to 5.23 MPa for the diesel alone operation at the same position. The apex point for NHRR was observed to be 54.51 J (°)⁻¹ for 5DEE + biogas in LHR engine positioned at 3.2° aTDC. The brake thermal efficiency at full engine load operation decreased by 12.7% and 5.2% for biogas substitutions of 0.8 kg h⁻¹ with diesel and 5DEE, respectively, compared to the base result. The smoke opacity and nitric oxide emissions were reduced during the DF run accompanied by diethyl ether as a fuel additive.

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使用沼气-二乙基醚-柴油的低热排斥发动机的性能和燃烧研究

除了阻碍国家进步的能源危机之外，本研究的重点是解决化石燃料加速枯竭和环境污染问题。在当前的研究中，废香蕉叶被视为生产沼气的基质。在双燃料（DF）操作中，沼气被用作主要燃料，以最大限度地节省柴油。使用体积分数为 5%的二乙醚与柴油（5DEE）混合作为试验燃料，在低热排斥（LHR）发动机中进行了性能和燃烧评估。发动机的燃烧属性显示，与基本结果的顶点相比，净热释放率（NHRR）曲线的顶点稍有延迟。在上死点（aTDC）后 11.7° 曲柄角（CA）处，使用 5DEE + 沼气的 LHR 发动机的气缸压力峰值为 6.19 兆帕，而在相同位置仅使用柴油时为 5.23 兆帕。在 LHR 发动机中，观察到 5DEE + 沼气在 3.2° aTDC 时的 NHRR 顶点为 54.51 J (°)-1。与基本结果相比，柴油和 5DEE 的沼气替代量为 0.8 kg h-1 时，发动机满负荷运行时的制动热效率分别降低了 12.7% 和 5.2%。在使用二乙醚作为燃料添加剂的情况下，DF 运行期间的烟雾不透明度和一氧化氮排放量均有所降低。

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Waste Disposal & Sustainable Energy

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