Table 2.

The thermal and exergy efficiency of the ORC configurations.

Efficiency	Thermal efficiency	Exergy efficiency
Basic ORC	${\eta }_{th}=\frac{{\dot{W}}_{\mathit{exp}}-{\dot{W}}_p}{{\dot{Q}}_{ev}}$	${\eta }_{ex}=\frac{{\dot{W}}_{net}}{{\dot{Ex}}_5-{\dot{Ex}}_6}$
IHE-ORC	${\eta }_{th}=\frac{{\dot{W}}_{\mathit{exp}}-{\dot{W}}_p}{{\dot{Q}}_{ev}}$	${\eta }_{ex}=\frac{{\dot{W}}_{net}}{{\dot{Ex}}_7-{\dot{Ex}}_8}$
FFH-ORC	${\eta }_{th}=\frac{{\dot{W}}_{\mathit{exp}}-{\dot{(W}}_{pI}+{\dot{W}}_{pII})}{{\dot{Q}}_{ev}}$	${\eta }_{ex}=\frac{{\dot{W}}_{net}}{{\dot{Ex}}_8-{\dot{Ex}}_9}$
IHE-FFH-ORC	${\eta }_{th}=\frac{{\dot{(W}}_{hpe}+{\dot{W}}_{lpe})-\left({\dot{W}}_{pI}+{\dot{W}}_{pII}\right)}{{\dot{Q}}_{ev}}$	${\eta }_{ex}=\frac{{\dot{W}}_{net}}{{\dot{Ex}}_{12}-{\dot{Ex}}_{13}}$