Quadratic Prediction Models for the Performance Comparison of a Marine Engine Fuelled with Biodiesels B5 and B20

Table 5

Accuracy check of the quadratic prediction model for biodiesel B20.

Speed (rpm)	Torque-B20 (Nm)		Error
	Measured value	Predicted value	(Nm)	Percentage	Absolute percentage
1000	739.11	739.63	0.52	0.07%	0.07%
1100	688.80	695.88	7.08	1.03%	1.03%
1200	610.73	580.09	−30.64	−5.02%	5.02%
1300	354.38	392.28	37.90	10.69%	10.69%
1400	147.30	132.43	−14.87	−10.10%	10.10%
Mean			0.004	−0.664%	5.381%
Interpretation				99.336% accuracy	Excellent prediction