在反应性控制的内燃机中建立最佳输出特性的运行条件
Sinnappadass Muniyappan1, Ravi Krishnaiah2
1School of Mechanical Engineering, VIT University, Vellore, 632014, Tamilnadu, India.
Scientific reports
|May 16, 2025
概括
研究人员通过使用Mahua生物柴油和乙醇优化了反应性控制的压缩点火 (RCCI) 燃烧. 该研究发现了平衡发动机性能,排放和燃油效率的最佳条件,显著减少了烟雾和氧化 (NOx).
科学领域:
- 内部燃烧发动机 内部燃烧发动机
- 燃烧科学 燃烧科学
- 其他替代燃料 替代燃料
背景情况:
- 现代发动机需要多样化的操作条件,适用于混合动力发动机和发电机等多种应用.
- 反应性控制压缩点火 (RCCI) 为提高效率和减少排放提供了一个有前途的燃烧策略.
- 使用生物柴油-柴油混合物和乙醇作为燃料组件,为更清洁的燃烧提供了一个途径.
研究的目的:
- 为了确定反应性控制的压缩点火 (RCCI) 燃烧的最佳发动机运行条件.
- 实现燃烧,性能和排放特性之间的平衡,重点是减少烟雾和氧化物 (NOx).
- 确定适用于混合动力系统,发电机和灌等应用的最佳参数.
主要方法:
- 在RCCI发动机中直接注入 (DI) 30%的Mahua生物柴油-柴油 (高反应性燃料) 和港口燃料注入 (PFI) 乙醇 (低反应性燃料).
- 在各种发动机负载和乙醇能量份额 (EES) 中评估的性能范围从0%到30%.
- 采用响应表面方法 (RSM) 来确定最佳操作条件,并通过实验验证实发现.
主要成果:
- 在28.43%的EES和83.4%的发动机负载下确定了最佳条件,产生32.54%的制动热效率 (BTE) 和10.79MJ/kWh的制动特定能耗 (BSEC).
- 与传统的DI模式相比,实现了烟雾 (34.8%) 和NOx (29.3%) 的显著降低.
- 观察到一氧化碳 (CO) 和碳化合物 (HC) 排放量分别增加了36.4%和34.9%,可以使用催化转换器来管理.
结论:
- 使用Mahua生物柴油和乙醇燃烧RCCI,可实现低温燃烧 (LTC),提高制动热效率 (BTE),减少烟雾和NOx等有害排放.
- 确定了最佳运行参数,在各种发动机应用中为性能和排放提供了平衡的解决方案.
- 虽然二氧化碳和气排放量增加了,但它们可以通过已建立的后处理系统 (如催化转换器) 来管理.
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