An Experimental Study of ZrO₂-CeO₂ Hybrid Nanofluid and Response Surface Methodology for the Prediction of Heat Transfer Performance: The New Correlations

Table 3

Thermal resistance and heat transfer coefficient variance analysis.

Source	Sum of squares	Degrees of freedom	Mean square	value
Thermal resistance
Model	165.42	5	33.08	8249.02	<0.0001
: power	147.69	1	147.69	36824.82	<0.0001
: volume concentration	0.12	1	0.12	29.90	0.0001
	0.023	1	0.023	5.81	0.0329
	12.20	1	12.20	3043.05	<0.0001
	0.043	1	0.043	10.64	0.0068
Residual	0.048	12	4.011-003
Total	165.4717
Heat transfer coefficient
Model	4289.64	5	857.93	168.13	< 0.0001
: power	4050.35	1	4050.35	793.78	< 0.0001
: volume concentration	131.34	1	131.34	25.74	0.0003
	19.35	1	19.35	3.79	0.0752
	12.19	1	12.19	2.39	0.1482
	45.13	1	45.13	8.84	0.0116
Residual	61.23	12	5.10
Total	4350.87	17