Experimental investigation of the effects of separate hydrogen and nitrogen addition on the emissions and combustion of a diesel engine
Experimental investigation of the effects of separate hydrogen and nitrogen addition on the emissions and combustion of a diesel engine
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DOI：
10.1016/j.ijhydene.2013.05.173
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发表时间：
2013-08-12
影响因子：
7.2
通讯作者：
Megaritis, Athanasios
中科院分区：
文献类型：
--
作者：
Christodoulou, Fanos;Megaritis, Athanasios
对单独添加氢气和氮气对柴油发动机排放和燃烧的影响进行了实验研究，并在本文中介绍了结果。实验是在一台仪表齐全的 HSDI 柴油发动机上进行的，该发动机的进气管连接有单独的氢气和氮气管线。瓶装气体以 2% 的步长以 2% 至 8%（总进气量的 v/v）浓度引入发动机。研究了对氮氧化物、烟雾和二氧化碳排放的影响。还介绍了根据废气中未燃烧的氢气计算得出的氢气燃烧效率。此外，还对氢-柴油、富氮进气和基准操作之间的效率进行了比较。结果表明，添加氢气可以减少烟尘和 CO，但会减少 NOx 排放。在低速低负载运行时观察到一个例外，其中氮氧化物排放量保持在相同水平。一般来说，制动器热效率在低速运行时略有恶化，但在高速运行时略有改善。氢气燃烧效率随着氢气含量、负荷和速度的增加而增加。通过用氮气稀释进气可以实现氮氧化物的大量减少，但这是以烟雾、二氧化碳和燃料消耗损失为代价的。版权所有 (C) 2013，Hydrogen Energy Publications, LLC。由爱思唯尔有限公司出版。保留所有权利。
An experimental investigation of the effects of separate hydrogen and nitrogen addition on the emissions and combustion of a diesel engine was performed and the results are presented in the current paper.The experiments were carried out on a fully instrumented HSDI diesel engine having separate hydrogen and nitrogen lines connected to the inlet pipe. Bottled gas was inducted into the engine at concentrations from 2 up to 8% (v/v of the total intake charge) in 2% steps. The effect on NOx, smoke and CO emissions was investigated. Hydrogen's combustion efficiency, calculated from the unburned hydrogen in the exhaust gas, is also presented. Furthermore, an efficiency comparison between hydrogen-diesel, nitrogen rich intake charge and baseline operation is demonstrated.The results showed that hydrogen addition decreases smoke and CO at the expense of NOx emissions. An exception was observed at low speed low load operation where NOx emissions maintained at the same levels. Generally, brake thermal efficiency was slightly deteriorated at low speed but slightly improved at high speed operation. Hydrogen combustion efficiency is increased with increasing hydrogen fraction, load and speed. A massive reduction of NOx is achieved by diluting the intake charge with nitrogen, but this comes at the expense of smoke, CO and fuel consumption penalties. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.