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

Table 3

Values of χ, θ, and ε of objective functions.

Objectives	Preference variation value χ	Deviation of preference variation value θ	Overall preference value ε
Effective efficiency ηEff	1.435	0.9893	0.3356
Exergy efficiency ηII	2.025	0.9849	0.3341
Number of plates Nplate	3.582	0.9733	0.3302