Cycles of Concentration (Flow Ratio)

Equivalent definition of cycles of concentration expressed as the ratio of makeup flow to blowdown flow. Shows that as blowdown decreases, COC and concentration rise.

$$\text{COC}=\frac{\text{Makeup rate}}{\text{Blowdown rate}}$$

Variables

Symbol	Meaning	Unit
${\dot{m}}_{makeup}$	Makeup water rate	gpm
${\dot{m}}_{blowdown}$	Blowdown rate	gpm

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Part of The Blueprint of Water