ASTM on Data Normalisation
From Desal Wiki
$ \operatorname{erfc}(x) = \frac{2}{\sqrt{\pi}} \int_x^{\infty} e^{-t^2}\,dt = \frac{e^{-x^2}}{x\sqrt{\pi}}\sum_{n=0}^\infty (-1)^n \frac{(2n)!}{n!(2x)^{2n}} $ $ \operatorname{Specific Flux} = \frac{Flux \times TCF}{NDP} $
Where:
$ \operatorname{TCF} = e^{x} $
$ x = u\left( \frac{1}{T+273} - \frac{1}{298}\right ) $
NDP = Net Driving Pressure
$ NDP = P_{feed}-\Delta \pi-\frac{\Delta P}{n+1}-P_{permeate} $