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 Effects of hydrogen-enriched biogas on combustion and emission characteristics of dual-fuel engine at different compression ratios
Tác giả hoặc Nhóm tác giả: Phan Minh Đức, Lê Minh Đức, Nguyễn Quang Trung, Huỳnh Tấn Tiến
Nơi đăng: 30th International Symposium on Transport Phenomena (ISTP30.com); Số: 30;Từ->đến trang: 536-541;Năm: 2019
Lĩnh vực: Kỹ thuật; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
Effects of hydrogen-enriched biogas on performance and emissions of a dual-fuel spark-ignition engine with different hydrogen concentration ratios were studied numerically. A 1-cylinder spark-ignition was used to perform a numerical simulation. To reveal the influence of compression ratio on combustion and emission characteristics of the dual-fuel engine, the crankshaft of the engine was modified to generate different compression ratios of 8.5, 9.0, 9.4, 10.0, and 10.4. The Biogas contained 60 and 40% of CH4 and CO2, respectively, while the hydrogen concentration used to enrich biogas was 10, 20, and 30% of the mixture by volume. The ignition timing is fixed at 350 CAo. The results indicate that the in-cylinder pressure, combustion temperature, and combustion burning speed increase gradually as increasing the hydrogen concentration due to the combustion characteristics of hydrogen in the blends. As increasing the compression ratio, NOx emissions increase appropriately.
ABSTRACT
Effects of hydrogen-enriched biogas on performance and emissions of a dual-fuel spark-ignition engine with different hydrogen concentration ratios were studied numerically. A 1-cylinder spark-ignition was used to perform a numerical simulation. To reveal the influence of compression ratio on combustion and emission characteristics of the dual-fuel engine, the crankshaft of the engine was modified to generate different compression ratios of 8.5, 9.0, 9.4, 10.0, and 10.4. The Biogas contained 60 and 40% of CH4 and CO2, respectively, while the hydrogen concentration used to enrich biogas was 10, 20, and 30% of the mixture by volume. The ignition timing is fixed at 350 CAo. The results indicate that the in-cylinder pressure, combustion temperature, and combustion burning speed increase gradually as increasing the hydrogen concentration due to the combustion characteristics of hydrogen in the blends. As increasing the compression ratio, NOx emissions increase appropriately.
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