Experimental study of biogas combustion in an HCCI engine for power generation with high indicated efficiency and ultra-low NOx emissions.
Experimental study of biogas combustion in an HCCI engine for power generation with high indicated efficiency and ultra-low NOx emissions.
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DOI：
10.1016/j.enconman.2011.08.016
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发表时间：
2012
影响因子：
10.4
通讯作者：
I. Bedoya;Samveg Saxena;Francisco Cadavid;R. Dibble;M. Wissink
中科院分区：
文献类型：
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作者：
I. Bedoya;Samveg Saxena;Francisco Cadavid;R. Dibble;M. Wissink
对沼气均质压燃发动机的燃烧参数和主要排放进行了研究。在一台四缸1.9L大众TDI柴油机上，通过进气温度控制、提高进气压力和进气歧管上游音速流动装置控制沼气组成和当量比，使其在均质压燃模式下运行。为了模拟典型的发电条件，发动机连接到一台以1800rpm运行的交流电机发电机。在启动过程中，所有气缸都在HCCI模式下使用汽油。在测试期间，在2号和3号气缸中使用沼气，在1号和4号气缸中使用汽油，以确保发动机冷却液和机油温度更稳定。试验通过实验析因设计来评价进气温度、增压压力和沼气-空气混合物当量比对均质压燃燃烧参数和排放的影响。对于当量比较低的沼气，进口充气温度和增压压力的轻微提高提高了燃烧参数，降低了CO和HC的排放。对于当量比较高的沼气，进气充气条件对均质压燃燃烧和CO、HC排放的影响有所减弱，但进气温度和增压压力越高，振铃强度和NOx排放越高。最大总指示有效压力为7.4bar，最大总指示效率接近45%，NOx排放量低于美国2010年规定的0.27g/kWh的限值。这些结果表明，沼气燃料均质压燃发动机在静态发电应用中是一个很有前途的选择，可以满足高效率和超低NOx排放的要求。
Combustion parameters and the main exhaust emissions from a biogas fueled HCCI engine are investigated in this study. The study was conducted on a 4-cylinder, 1.9L Volkswagen TDI Diesel engine, which was modified to run in HCCI mode with biogas by means of inlet charge temperature control, boosted intake pressure, and a sonic flow device upstream of the inlet manifold to control biogas composition and the equivalence ratio. For simulating typical power generation conditions, the engine was coupled to an AC motor generator operating at 1800rpm. In the startup process, gasoline was used in HCCI mode for all cylinders. During the tests, biogas was used in cylinders 2 and 3, and gasoline was used in cylinders 1 and 4 to allow for more stable engine coolant and oil temperatures. The tests were performed through an experimental factorial design to evaluate the effect of inlet charge temperature, boost pressures, and the equivalence ratio of the biogas–air mixture on HCCI combustion parameters and emissions. For biogas at lower equivalence ratios, slight increases in inlet charge temperature and boost pressures enhanced combustion parameters and reduced CO and HC emissions. For biogas at higher equivalence ratios, the effects of inlet charge conditions on HCCI combustion and CO and HC emissions were attenuated; however, ringing intensities and NOxemissions were increased with higher inlet charge temperature and higher boosted pressures. The maximum gross indicated mean effective pressure was 7.4bar, the maximum gross indicated efficiency was close to 45%, and NOxemissions were below the US-2010 limit of 0.27g/kWh. These results show that a biogas fueled HCCI engine is a promising option in stationary power generation applications, meeting high efficiency and ultra-low NOxemissions.