Table 16.

Optimized values for decision variables and objective function.

Parameters	Case base		Multi-objective Optimization
	Units	Value	A	B	C	D	E
Pump efficiency, ${\eta }_{\mathrm{p}}$	%	75	75	74	79	79	78
Turbine efficiency, ${\eta }_{\mathrm{t}}$	%	80	84	85	85	85	85
Evaporator pinch, $\mathrm{A}\mathrm{P}$	°C	30	30.21	30.05	30.01	33.84	30.27
Condensing temperature, ${\mathrm{T}}_{\mathrm{c}\mathrm{o}\mathrm{n}\mathrm{d}}$	°C	40	41.00	41.00	40.99	40.99	41.00
Condenser pinch, $\mathrm{P}\mathrm{i}\mathrm{n}\mathrm{c}\mathrm{h}$	°C	15	5.02	5.04	5.02	5.01	5.01
Emergy Sustainability Index, $\mathrm{E}\mathrm{S}\mathrm{I}$	%	-	4.80	3.97	1.61	3.93	4.32
Exergetic efficiency, ${\eta }_{\mathrm{I}\mathrm{I}}$	-	-	44.18	47.49	68.97	70.06	72.97

A = toluene; B = cyclohexane; C = cyclohexane/R11 (0.2/0.8); D = cyclohexane/R11 (0.25/0.75); E = cyclohexane/R11 (0.30/0.70).