Open Access
Table 7
ANOVA method for exhaust emissions.
| Source | NOx (ppm) |
CO (ppm) |
CO2 (%) |
O2 (%) |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sum of squares | F-value | P-value | Sun of squares | F-value | P-value | Sun of squares | F-value | P-value | Sum of squares | F-value | P-value | |
| Model | 9427.38 | 86.77 | 0.000 | 260130 | 99.09 | 0.000 | 1.85913 | 130.33 | 0.000 | 6.29595 | 262.21 | 0.000 |
| Linear | 9277.00 | 256.17 | 0.000 | 225703 | 257.94 | 0.000 | 1.57883 | 332.03 | 0.000 | 5.30808 | 663.21 | 0.000 |
| A-CNG blend | 1152.00 | 95.43 | 0.000 | 106261 | 364.31 | 0.000 | 0.00001 | 0.01 | 0.932 | 0.01361 | 5.10 | 0.058 |
| B-biodiesel ratio (%) | 1512.50 | 125.30 | 0.000 | 2556 | 8.76 | 0.021 | 0.03001 | 18.94 | 0.003 | 0.07801 | 29.24 | 0.001 |
| C-engine speed (rpm) | 6612.50 | 547.78 | 0.000 | 116886 | 400.74 | 0.000 | 1.54880 | 977.16 | 0.000 | 5.21645 | 1955.30 | 0.000 |
| Square | 97.63 | 2.70 | 0.126 | 31192 | 35.65 | 0.000 | 0.27975 | 58.83 | 0.000 | 0.98225 | 122.73 | 0.000 |
| A2 | 23.75 | 1.97 | 0.203 | 901 | 3.09 | 0.122 | 0.00501 | 3.16 | 0.119 | 0.00348 | 1.30 | 0.291 |
| B2 | 3.22 | 0.27 | 0.621 | 963 | 3.30 | 0.112 | 0.00038 | 0.24 | 0.639 | 0.23501 | 88.09 | 0.000 |
| C2 | 63.22 | 5.24 | 0.056 | 29269 | 100.35 | 0.000 | 0.26739 | 168.70 | 0.000 | 0.78306 | 293.52 | 0.000 |
| 2-way interaction | 52.75 | 1.46 | 0.306 | 1078 | 3.70 | 0.070 | 0.00055 | 0.12 | 0.948 | 0.00563 | 0.70 | 0.580 |
| AB | 20.25 | 1.68 | 0.236 | 1024 | 3.51 | 0.103 | 0.00010 | 0.06 | 0.809 | 0.00062 | 0.23 | 0.643 |
| AC | 12.25 | 1.01 | 0.347 | 729 | 2.50 | 0.158 | 0.00022 | 0.14 | 0.718 | 0.00010 | 0.04 | 0.852 |
| BC | 20.25 | 1.68 | 0.236 | 1482 | 5.08 | 0.059 | 0.00023 | 0.14 | 0.718 | 0.00490 | 1.84 | 0.217 |
| Error | 84.50 | 2042 | 0.01109 | 0.01867 | ||||||||
| Total | 9511.88 | 262172 | 1.87022 | 6.31462 | ||||||||
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