First and Second Law Evaluation of Multipass Flat-Plate Solar Air Collector and Optimization Using Preference Selection Index Method

Table 4

Results of preference selection index Ω and ranking for 5 best cases (ranking 1 to 5) and 5 worst cases (ranking 131 to 135).

Case, i	Collector type	Air mass flow rate m, kg/s	Collector length L, m	Channel depth H, m	Objectives			Ω	Ranking
					ηEff	Nplate	ηII
7	1	0.01	2.5	0.02	0.5209	4	0.04733	0.8493	1
61	3	0.01	2.5	0.02	0.4629	3	0.03864	0.8423	2
70	3	0.015	2.5	0.02	0.5344	3	0.03273	0.8379	3
8	1	0.01	2.5	0.025	0.509	4	0.04626	0.8357	4
4	1	0.01	2	0.02	0.5504	4	0.04266	0.8319	5
120	5	0.015	1.5	0.03	0.4412	3	0.01501	0.6662	131
100	4	0.02	1.5	0.02	0.6125	4	0.01302	0.6571	132
114	5	0.01	2	0.03	0.356	3	0.01942	0.6531	133
111	5	0.01	1.5	0.03	0.3694	3	0.01589	0.6354	134
19	1	0.02	1.5	0.02	0.6513	4	0.005287	0.6231	135