Research Article
Study on the Simplification Calculation Model of Marine Diesel Engine Exhaust Flow Based on Air-Fuel Ratio
| | Work condition | 1 | 2 | 3 | 4 |
| | Diesel engine operating parameters | | Power (kW) | 162 | 121.5 | 82.8 | 35 | | Rotational speed (rpm) | 1500 | 1360 | 1200 | 900 | | Torque (N·m) | 1800 | 1090 | 659.6 | 370.8 | | Oil consumption rate (g/kWh) | 728.3 | 587.5 | 419.1 | 157.6 | | Oil consumption (kg/h) | 118 | 71.38 | 34.7 | 5.5 | | Atmospheric environmental parameters | | Ambient pressure (kPa) | 100.74 | 100.75 | 100.77 | 100.78 | | Ambient temperature (°C) | 12 | 12 | 11.9 | 11.6 | | Pressure of water vapor /kPa | 1.401 | 1.401 | 1.392 | 1.3401 | | Relative humidity (%) | 60.0 | 59.7 | 58.7 | 58.2 | | Gas analyzer measured exhaust gas composition and its parameters | | NOX dry volume concentration | 4.48 × 10−4 | 3.78 × 10−4 | 9.8 × 10−4 | 6.5 × 10−4 | | SO2 dry volume concentration | 0.07 × 10−4 | 0.06 × 10−4 | 0.06 × 10−4 | 0.07 × 10−4 | | CZHX | 0.9 × 10−4 | 0.9 × 10−4 | 0.9 × 10−4 | 1 × 10−4 | | CO2 (%) | 8.36 | 6.22 | 5.3 | 5 | | CO | 2.7 × 10−4 | 2.4 × 10−4 | 2.8 × 10−4 | 2.4 × 10−4 | | O2 (%) | 9.26 | 12.2 | 13.7 | 14.3 | | Flow speed υ (m/s) | 0.54 | 0.68 | 0.77 | 0.8 | | Flow rate V (m3/s) | 0.017 | 0.022 | 0.024 | 0.025 | | Cavity temperature (°C) | 19 | 18.9 | 18.9 | 18.2 |
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