Saturated vapor is condensed to saturated liquid in a condenser.

Saturated vapor is condensed to saturated liquid in a condenser. The heat capacity ratio
is C_r = C_min . The effectiveness ( ε ) of the condenser is
C_max

ε of condenser is given by 1-exp(-NTU) Because

C_r =	C_min	= 0 ( as C_max → ∞ )
	C_max

is C_r =	C_min	. The effectiveness ( ε ) of the condenser is
	C_max

	1 - exp[ -NTU(1 + C_r) ]	.
	1 + C_r

	1 - exp[ -NTU(1 + C_r) ]	.
	1 + C_r[ -NTU(1 + C_r) ]

	NTU	.
	1 + NTU