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 Combustion Characteristics of DA465QE Engine Fueled with HHO Enriched Biogas
Tác giả hoặc Nhóm tác giả: Anh Vu Vo, Thi Minh Tu Bui, Tan Tien Huynh & Thong Ngo Tan
Nơi đăng: Proceedings of the 3rd Annual International Conference on Material, Machines and Methods for Sustainable Development (MMMS2022). MMMS 2022. Lecture Notes in Mechanical Engineering. Springer, Cham.; Số: https://doi.org/10.1007/978-3-031-31824-5_31;Từ->đến trang: 31;Năm: 2023
Lĩnh vực: Chưa xác định; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
This paper presents the results of a numerical simulation of the performance of the DA465QE engine and the impact of adding HHO to biogas on its efficiency and pollutant emissions. The results showed that at a given operating condition, an increase in HHO and CH4 concentrations, as well as the load regime, led to an increase in the indicative work cycle Wi. However, this increase decreased as engine speed increased and reached a peak value when the equivalence ratio and advanced ignition timing varied. Additionally, an increase in HHO and CH4 concentrations, the load regime, and advanced ignition timing was found to result in a rise in the combustion temperature T and NOx content in the exhaust gas. But, when engine speed increased, a decrease was observed, and a peak value was achieved with variations in the equivalence ratio. The rate of increase in NOx concentration with the equivalence ratio was found to be higher than that of Wi and T. When the HHO concentration in the biogas mixture was below 30%, the improvement in Wi was observed to be beneficial before the increase in NOx. Given that the biogas engine operates with a lean mixture, the addition of HHO is especially intriguing. The optimal ignition timing was found to reduce 6CA as effectively as adding 30% HHO to biogas at a certain engine speed. By properly adjusting the engine's operating parameters when using HHO-enriched biogas as fuel, a balance between performance and NOx emissions can be achieved. A compromise between performance and NOx emission can be obtained by appropriate adjustment of operating conditions of the engine fueled with HHO enriched biogas.
ABSTRACT
This paper presents the results of a numerical simulation of the performance of the DA465QE engine and the impact of adding HHO to biogas on its efficiency and pollutant emissions. The results showed that at a given operating condition, an increase in HHO and CH4 concentrations, as well as the load regime, led to an increase in the indicative work cycle Wi. However, this increase decreased as engine speed increased and reached a peak value when the equivalence ratio and advanced ignition timing varied. Additionally, an increase in HHO and CH4 concentrations, the load regime, and advanced ignition timing was found to result in a rise in the combustion temperature T and NOx content in the exhaust gas. But, when engine speed increased, a decrease was observed, and a peak value was achieved with variations in the equivalence ratio. The rate of increase in NOx concentration with the equivalence ratio was found to be higher than that of Wi and T. When the HHO concentration in the biogas mixture was below 30%, the improvement in Wi was observed to be beneficial before the increase in NOx. Given that the biogas engine operates with a lean mixture, the addition of HHO is especially intriguing. The optimal ignition timing was found to reduce 6CA as effectively as adding 30% HHO to biogas at a certain engine speed. By properly adjusting the engine's operating parameters when using HHO-enriched biogas as fuel, a balance between performance and NOx emissions can be achieved. A compromise between performance and NOx emission can be obtained by appropriate adjustment of operating conditions of the engine fueled with HHO enriched biogas.
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