ASTM on Data Normalisation

$\operatorname {SpecificFlux} ={\frac {Flux\times TCF}{NDP}}$

Where: $\operatorname {TCF} =e^{x}$

$x=u\left({\frac {1}{T+273}}-{\frac {1}{298}}\right)$

NDP = Net Driving Pressure

$NDP=P_{feed}-\Delta \pi -{\frac {\Delta P}{n+1}}-P_{permeate}$

$P_{feed}=$ RO feed pressure

$\Delta \pi =$ Osmotic Pressure

$\Delta P=$ Feed/Brine Differential Pressure

$n+1=$ Number of membrane stages

$P_{permeate}=$ Permeate back pressure