Emission and Performance Optimization of Marine Four-Stroke Dual-Fuel Engine Based on Response Surface Methodology

Table 3

ANOVA table for power, BSFC, NO_X, and P_max.

Source	Power (kW)		BSFC (g/kWh)		NOX (g/kWh)		Pmax (bar)
Type	Quadratic		Quadratic		Quadratic		Quadratic
	value	%	value	%	value	%	value	%
Model	<0.0001		<0.0001		0.0018		<0.0001
x	<0.0001	19.04	<0.0001	19.43	0.0006	43.56	<0.0001	15.41
y	<0.0001	58.58	<0.0001	58.61	0.1995	6.72	<0.0001	41.23
z	<0.0001	22.39	<0.0001	21.96	0.0003	49.72	<0.0001	43.36
xy	0.0779		0.0211		0.6097		0.0004
xz	<0.0001		0.0001		0.0012		0.0002
yz	0.8902		0.1534		0.3448		<0.0001
x^2	0.0071		0.0099		0.1262		0.217
y^2	0.0034		0.002		0.826		0.9557
z^2	0.0002		0.0002		0.0261		0.0001
R^2		0.9998		0.9997		0.9877		1.0000
Adj.-R^2		0.9993		0.9992		0.9599		0.9999
Pred.-R^2		0.9978		0.9972		0.8755		0.9995