研究各种压缩比下自由活塞发动机发电机的实施情况和多种燃料的燃烧性能

IF 9 1区工程技术 Q1 ENERGY & FUELS

Energy Pub Date : 2024-11-06 DOI:10.1016/j.energy.2024.133690

Lei Xu, Yidi Wei, Chang Liu, Boru Jia, Zhiyuan Zhang, Shuo Qin, Xiaoxu Hu, Huihua Feng, Zhengxing Zuo

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引用次数: 0

摘要

自由活塞发动机发电机（FPEG）是一种新型能量转换系统，它直接将自由活塞发动机与线性发电机耦合在一起。它无需复杂的辅助结构就能在很大范围内调节压缩比，并能适应不同的燃料，因此备受关注。为了提高 FPEG 的效率和清洁度，本研究采用了 FPEG 原型试验台，以乙醇和正丙醇为原料，与航空煤油 (RP-3) 混合，体积比分别为 20%、40% 和 60%。研究了使用不同燃料时，不同运行参数对 FPEG 压缩比的影响机理和运行特性，并分析了不同压缩比条件下 FPEG 的燃烧和排放特性。结果表明，与汽油相比，酒精/RP-3 混合物（酒精含量为 40%）具有更高的制动热效率，并显著降低了 CO 排放。随着压缩比的增加，酒精/RP-3 混合物的制动热效率进一步提高，而 CO 和 HC 排放量则有所减少。在更高的压缩比下，正丙醇/煤油混合物的效率更高，而 CO 和 HC 排放量更低。这些发现为 FPEG 的多燃料应用以及清洁能源转换的潜力提供了重要的启示。

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Research on the implementation of free piston engine generator at various compression ratios and combustion performance of multiple fuels

The Free Piston Engine Generator (FPEG) is a novel energy conversion system that directly couples a free piston engine with a linear generator. Its ability to adjust the compression ratio over a wide range without complex auxiliary structures and its adaptability to different fuels have garnered significant attention. To improve the efficiency and cleanliness of FPEG, This study employs an FPEG prototype test bench, using ethanol and n-propanol as raw materials, mixed with aviation kerosene (RP-3) at volume ratios of 20 %, 40 %, and 60 %, respectively. It investigates the impact mechanisms and operating characteristics of different running parameters on the compression ratio of FPEG when using different fuels, and to analyze the combustion and emission characteristics of FPEG under various compression ratio conditions. The results show that compared to gasoline, the alcohol/RP-3 mixtures (with alcohol content >40 %) have higher brake thermal efficiency and significantly reduced CO emissions. As the compression ratio increases, the brake thermal efficiency of alcohol/RP-3 mixtures further improves, while CO and HC emissions decrease. At higher compression ratios, the n-propanol/kerosene blends show higher efficiency and lower CO and HC emissions. These findings provide important insights into the multi-fuel application of FPEG and the potential for cleaner energy conversion.

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来源期刊

Energy 工程技术-能源与燃料

CiteScore

15.30

自引率

14.40%

发文量

审稿时长

14.2 weeks

期刊介绍： Energy is a multidisciplinary, international journal that publishes research and analysis in the field of energy engineering. Our aim is to become a leading peer-reviewed platform and a trusted source of information for energy-related topics. The journal covers a range of areas including mechanical engineering, thermal sciences, and energy analysis. We are particularly interested in research on energy modelling, prediction, integrated energy systems, planning, and management. Additionally, we welcome papers on energy conservation, efficiency, biomass and bioenergy, renewable energy, electricity supply and demand, energy storage, buildings, and economic and policy issues. These topics should align with our broader multidisciplinary focus.