Temperature polarization coefficients in membrane distillation

Journal Article · Wed Apr 01 00:00:00 EST 1998 · Separation Science and Technology

DOI:https://doi.org/10.1080/01496399808544876· OSTI ID:634686

Martinez-Diez, L; Vazquez-Gonzalez, M I; Florido-Diaz, F J ^[1]

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1. Univ. de Malaga (Spain)

Membrane distillation is a membrane process in which two liquid phases at different temperatures are separated by a microporous hydrophobic membrane. The membrane plays the role of a physical support for the vapor-liquid interface. The aim of this paper is to study pure water transport by membrane distillation through a PTFE flat membrane. The dependence of the phenomenon on average temperature and recirculation rate at the membrane sides is investigated. The influence of these operating conditions on water transport is discussed by taking into account mass and heat transfer within the membrane and the adjoining liquid phases. The concept of temperature polarization is introduced into the transport equations and shown to be important in the interpretation of the experimental results.

• Sponsoring Organization: USDOE
• OSTI ID: 634686
• Journal Information: Separation Science and Technology, Vol. 33, Issue 6; Other Information: PBD: Apr 1998
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
DISTILLATION EQUIPMENT
MEMBRANE TRANSPORT
PERFORMANCE
WATER
MASS TRANSFER
HEAT TRANSFER
TEMPERATURE GRADIENTS