Despite their high thermal efficiency (>50%), large two-stroke (2 T) diesel engines burning very cheap heavy fuel oil (HFO) produce a high level of carbon dioxide (CO₂). To achieve the low emission levels of greenhouse gases (GHG) that will be imposed by future legislation, the use of hydrogen (H₂) as fuel in 2 T diesel engines is a viable option for reducing or almost eliminate CO₂ emissions. In this work, from experimental data and system modelling, an analysis of dual combustion is carried out considering different strategies to supply H₂ to the engine and for different H₂ fractions in energy basis. Previously, a complete thermodynamic model of a 2 T diesel engine with an innovative scavenging model is developed and validated. The most important drawbacks of this type of engines are controlled in this work using dual combustion and water injection, reducing nitrogen oxides emissions (NOx), self-ignition and combustion knocking. The results show that the developed model matches engine performance data in diesel mode, achieving a higher efficiency and mean effective pressure (MEP) in hydrogen mode of 53% and 14.62 bar respectively.

尽管它们的热效率很高 (>50%)，但燃烧非常便宜的重油 (HFO) 的大型二冲程 (2T) 柴油发动机会产生大量的二氧化碳 (CO ₂ )。为了实现未来立法规定的温室气体 (GHG) 低排放水平，在 2 T 柴油发动机中使用氢气 (H ₂ ) 作为燃料是减少或几乎消除 CO ₂排放的可行选择。在这项工作中，根据实验数据和系统建模，考虑到向发动机提供 H _{2 的}不同策略和不同 H _{2 的}不同策略，对双燃烧进行了分析。以能量为基础的分数。此前，开发并验证了具有创新扫气模型的 2 T 柴油发动机的完整热力学模型。这种类型的发动机最重要的缺点是在这项工作中使用双燃烧和水喷射来控制，减少氮氧化物排放 (NOx)、自燃和燃烧爆震。结果表明，开发的模型与柴油模式下的发动机性能数据相匹配，在氢模式下实现了更高的效率和平均有效压力 (MEP)，分别为 53% 和 14.62 bar。