Numerical Analysis of NOₓ Reduction Using Ammonia Injection and Comparison With Water Injection
| Autor: | Laura Castro-Santos, Carlos Gervasio Rodriguez Vidal, María Isabel Lamas Galdo |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
020209 energy
Analytical chemistry Thermal effect Top dead center Ocean Engineering 02 engineering and technology NOx Diesel engine nox ammonia Ammonia chemistry.chemical_compound lcsh:Oceanography lcsh:VM1-989 0202 electrical engineering electronic engineering information engineering Water injection (engine) lcsh:GC1-1581 cfd Water Science and Technology Civil and Structural Engineering Inert engine lcsh:Naval architecture. Shipbuilding. Marine engineering Water injection 021001 nanoscience & nanotechnology NOₓ Dilution chemistry water injection 0210 nano-technology CFD Engine |
| Zdroj: | RUC. Repositorio da Universidade da Coruña instname Journal of Marine Science and Engineering, Vol 8, Iss 2, p 109 (2020) Journal of Marine Science and Engineering Volume 8 Issue 2 |
| Popis: | This work analyzes NOx reduction in a marine diesel engine using ammonia injection directly into the cylinder and compares this procedure with water injection. A numerical model based on the so-called inert species method was applied. It was verified that ammonia injection can provide almost 80% NOx reduction for the conditions analyzed. Furthermore, it was found that the effectiveness of the chemical effect using ammonia is extremely dependent on the injection timing. The optimum NOx reduction was obtained when ammonia is injected during the expansion stroke, while the optimum injection timing using water is near top dead center. Chemical, thermal, and dilution effects of both ammonia and water injection were compared. The chemical effect was dominant in the case of ammonia injection. On the other hand, water injection reduces NOx through dilution and, more significantly, through a thermal effect. |
| Databáze: | OpenAIRE |
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