Study on the Effect of High Ammonia Energy Ratio on the Performance of Caterpillar 3400 Diesel Engine

Dong Tang; Ruixiao Tian

doi:10.6919/ICJE.202504_11(4).0055

Authors

Dong Tang
Ruixiao Tian

DOI:

https://doi.org/10.6919/ICJE.202504_11(4).0055

Keywords:

Diesel; Dual Fuel; Ammonia Energy Ratio; The Numerical Simulation.

Abstract

Ammonia is considered as an ideal alternative engine fuel because of its absence of carbon atoms, as well as its high ignition energy, high octane number, and its application in high compression ratio engines. Taking a Caterpillar 3400 diesel engine as the research object, the engine combustion chamber simulation model is established in CONVERGE, and the simulation results are compared and verified. On this basis, the influence law of ammonia energy ratio on the performance of dual-fuel engine is investigated, and the results show that when the ammonia energy ratio is increased from 50% to 90, ammonia fuel dominates the exotherm, the flame propagation in the cylinder becomes slower, and the exotherm in the premixed combustion region decreases, retarding the crankshaft angle of CA10, CA50 and CA90. Blending of ammonia in the diesel engine improves the combustion CE before 90% ammonia energy ratio. but when the ammonia energy ratio reaches 90%, the CE decreases. at 80% ammonia energy ratio, the CO and CO₂ emissions are 2.42 g/kW·h and 18.70 g/kW·h, respectively, and the N₂O emission is 0.22 g/kW·h, and the greenhouse gases such as GHGs and nitrogen oxides achieve the optimum emission level.

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