Experimental and theoretical investigation of heat transfer characteristics of cylindrical heat pipe using Al2O3–SiO2/W-EG hybrid nanofluids by RSM modeling approach

Journal of Engineering and Applied Science

Table 4 Comparison between experimental and RSM model results

Volume concentration (%)	Power (W)	Experimental results using heat pipe		RSM model results		% of Deviation
Volume concentration (%)	Power (W)	Thermal resistance (K/W)	Heat transfer coefficient (W/m² K)	Thermal resistance (K/W)	Heat transfer coefficient (W/m² K)	Thermal resistance (K/W)	Heat transfer coefficient (W/m² K)
0	30	11.06	14.88	10.90	14.70	1.48	− 1.26
	60	5.57	28.55	5.55	29.99	0.39	4.79
	90	3.71	43.32	3.68	48.74	0.75	11.12
0.0125	30	10.64	18.93	10.78	17.35	− 1.33	− 9.12
	60	5.38	35.27	5.55	29.99	− 3.23	− 17.62
	90	3.55	56.79	3.68	48.74	− 3.72	− 16.53
0.025	30	10.64	19.01	10.69	19.41	− 0.49	2.04
	60	5.37	35.63	5.55	29.99	− 3.39	− 18.82
	90	3.53	58.96	3.68	48.74	− 4.28	− 20.97
0.05	30	10.56	19.97	10.55	21.76	0.09	8.22
	60	5.30	38.78	5.55	29.99	− 4.69	− 29.33
	90	3.53	59.36	3.68	48.74	− 4.38	− 21.79
0.075	30	10.51	20.67	10.49	21.73	0.20	4.88
	60	5.29	39.31	5.55	29.99	− 4.88	− 31.07
	90	3.51	61.15	3.68	48.74	− 4.81	− 25.47
0.1	30	10.50	20.82	10.51	19.34	− 0.02	− 7.64
	60	5.28	40.02	5.55	29.99	− 5.15	− 33.46
	90	3.50	62.02	3.68	48.74	− 5.01	− 27.25
					Mean:	− 2.36%	− 12.74%