Air humidification by free convection in a vertical channel

被引：11

作者：

Orfi, J. ^{[1
]}

Debbissi, C. ^{[1
]}

Mohamed, A. Belhaj ^{[1
]}

Nasrallah, S. B. ^{[1
]}

机构：

[1] Ecole Natl Ingenieurs Monastir, Lab Etud Syst Energet & Therm, Monastir 5019, Tunisia

来源：

DESALINATION | 2004年 / 168卷

关键词：

Humidification; Natural convection; Liquid film; Evaporation;

D O I：

10.1016/j.desal.2004.06.182

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The evaporation of a thin liquid film flowing down on the internal face of one plate of a vertical channel is studied. The wet plate is subjected to a uniform heat flux while the second plate is taken isothermal and impermeable. The governing equations in the liquid and in the gas regions with the boundary and interfacial conditions are solved using a marching fully implicit method. The results obtained for an air-water system show that the interfacial heat and mass transfers depend largely on the inlet liquid film conditions (inlet temperature and inlet mass flow rate) and the external heating flux. In particular, it is observed that the interfacial heat flux may be larger than the heat flux imposed on the wall. This study also shows the importance of taking into account the inertia terms in the liquid energy equation.

引用

页码：161 / 168

页数：8

共 16 条

[1]

Buros O. K., 2000, ABC S DESALTING

[2] Numerical study of heat and mass transfer in mixed convection inside a vertical channel with a binary liquid film streaming in one of its heated walls [J].

Cherif, AA ;

Daïf, A .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1999, 42 (13) :2399-2418

[3] Parametric analysis to improve the performance of a solar desalination unit with humidification and dehumidification [J].

Dai, YJ ;

Wang, RZ ;

Zhang, HF .

DESALINATION, 2002, 142 (02) :107-118

[4] Evaporation of water by free convection in a vertical channel including effects of wall radiative properties [J].

Debbissi, C ;

Orfi, J ;

Ben Nasrallah, S .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2001, 44 (04) :811-826

[5]

DEBBISSI C, 2001, THESIS FACULTE SCI T

[6]

Gebhart B., 1988, Buoyancy-Induced Flows and Transport

[7] Thermodynamic and economic considerations in solar desalination [J].

Goosen, MFA ;

Sablani, SS ;

Shayya, WH ;

Paton, C ;

Al-Hinai, H .

DESALINATION, 2000, 129 (01) :63-89

[8] Numerical study of the evaporation in laminar humid air flow of a liquid film flowing over an inclined plate. [J].

Mezaache, E ;

Daguenet, M .

INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2000, 39 (01) :117-129

[9] Solar desalination based on humidification process - II. Computer simulation [J].

Nawayseh, NK ;

Farid, MM ;

Omar, AA ;

Sabirin, A .

ENERGY CONVERSION AND MANAGEMENT, 1999, 40 (13) :1441-1461

[10] New development in the theory of heat and mass transfer in solar stills [J].

Shawaqfeh, AT ;

Farid, MM .

SOLAR ENERGY, 1995, 55 (06) :527-535

← 1 2 →