Membrane and Desalination Technologies - TCE Moodle Website

556 J.P. Chen et al.
h S ¼ Enthalpy of condensate (kJ/kg)
Hs ¼ Enthalpy of steam (kJ/kg)
H V ¼ Enthalpy of vapor (kJ/kg)
L ¼ Concentrated liquid leaving the evaporator (kg/h)
P1 ¼ Saturation vapor pressure of the liquid of composition (XL) at its boiling point (TL)
q ¼ Rate of heat transfer (W)
S ¼ Condensed steam leaving the system (kg/h)
TL ¼ Temperature of the concentrated liquid leaving the evaporator (K)
TF ¼ Temperature of the feed to the evaporator (K)
TS ¼ Temperature of the condensed steam leaving the system (K)
TV ¼ Temperature of the vapor (K)
U ¼ Overall heat-transfer coefficient (W/m 2 K)
V ¼ Vapor given off as pure solvent (kg/h)
X F ¼ Solid content of the feed to the evaporator (mass fraction)
XL ¼ Solid content of the concentrated liquid leaving the evaporator (mass fraction)
YV ¼ Solid content of the vapor = 0
l ¼ Latent heat given off by steam (kJ/kg)
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