Symbols	Description	Units
A	Total membrane bore surface area	m2
Cf	Salt concentration in feed water	wt%
Cp	Salt concentration in permeated water	wt%
Cp0	Accurate salt concentration of permeated water	wt%
Cw	Salt concentration in washing water	wt%
Jsp	Leaking salt flux into permeated water	g/m2·h
Jsr	Leaking salt flux remaining on shell surface of membrane	g/m2·h
Jst	Total leaking salt flux	g/m2·h
Jw	Water vapor flux	kg/m2·h
mp	Weight of salt in permeated water	kg
mr	Weight of salt remaining on shell surface of membrane	kg
mp0	Weight of total permeated salt	kg
rF	Salt retention factor	%
T	Operating time	H
Wp	Weight of permeated water	kg
Ww	Weight of washing water	kg