Effects of humidification on the performance and emission characteristics of a diesel engine fueled on diesel-ammonia and diesel-hydrogen mixtures
International Journal of Hydrogen Energy, cilt.258, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 258
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.ijhydene.2026.156553
- Dergi Adı: International Journal of Hydrogen Energy
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Artic & Antarctic Regions, Chemical Abstracts Core, Chimica, Compendex, Environment Index, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Anahtar Kelimeler: Ammonia, Diesel engine, Emission, Humidification, Hydrogen, Performance analysis
- İstanbul Ticaret Üniversitesi Adresli: Hayır
Özet
This research evaluates the effects of intake air humidification (1–10% mass) on a compression-ignition engine utilizing diesel, diesel-ammonia, and diesel-hydrogen blends at 50% and 100% loads. 3D numerical analyses reveal moisture significantly mitigates NO emissions by suppressing combustion temperatures and oxygen levels. At full load (10% humidity), NO substantially decreased from 4.0 to 0.8 g/kWh for pure diesel, and from 1.65 to 0.5 g/kWh for the ammonia dual-fuel. However, performance trade-offs emerged: baseline diesel thermal efficiency dropped (32.5% to 29%) while ISFC rose (246 to 275 g/kWh). Notably, diesel-hydrogen at 50% load demonstrated an optimum at 4% moisture, where thermal efficiency peaked at 41%, ISFC minimized to 166.5 g/kWh, and NO halved (11.6 to 5.7 g/kWh). Conclusively, while humidification provides substantial NO mitigation, meticulous, fuel-specific moisture optimization is vital to sustain engine performance.