Research on Energy-Saving Experimental of Critical Dehumidification of Combined Drying by Dehumidification Wheel and Heat Pump

Table 3

Variance analysis of response surface model.

Item	Color difference eY1				Rehydration ratioY2				SMER Y3
	Df	T		Coefficient	Df	T		Coefficient	Df	T		Coefficient
Constant	1	234.686		43.902	1	301.544		5.725	1	208.704		1.630
X1	1	5.970	0.002	0.647	1	−1.860	0.122	−0.020	1	−10.858		−0.049
X2	1	−19.442		−2.106	1	−18.484		−0.203	1	−13.571		−0.061
X3	1	12.126		1.213	1	2.833	0.037	0.029	1	−3.893	0.011	−0.016
	1	3.804	0.013	0.635	1	4.399	0.007	0.075	1	−11.999		−0.084
	1	1.217	0.278	0.203	1	−5.206	0.003	−0.088	1	−11.151		−0.078
	1	1.120	0.314	0.167	1	1.186	0.289	0.018	1	−14.946		−0.093
X1X2	1	−1.946	0.109	−0.364	1	−0.601	0.574	−0.011	1	−1.741	0.142	−0.014
X1X3	1	−0.884	0.417	−0.125	1	−1.916	0.113	−0.028	1	5.929	0.002	0.035
X2X3	1	−6.011	0.002	−0.850	1	−2.787	0.039	−0.040	1	8.046		0.048
Regression	9	65.84			9	52.38			9	104.77
Linear	3	175.90			3	129.29			3	134.42
Square	3	5.14	0.055		3	26.76	0.002		3	128.35
Interaction	3	13.57	0.008		3	3.93	0.087		3	34.31	0.001
Lack of fit	3	19.75	0.167		3	20.35	0.165		3	0.62	0.727
Total	R-sq = 99.16% R-Sq (adj) = 97.66%				R-sq = 98.95% R-Sq (adj) = 97.06%				R-sq = 99.47%; R-Sq (adj) = 98.52%

Note.Significance ().