Experimental study of air gap and direct contact membrane distillation configurations: application to geothermal and seawater desalination

Desalination ◽  
2004 ◽  
Vol 168 ◽  
pp. 357 ◽  
Author(s):  
A. El Amali ◽  
S. Bouguecha ◽  
M. Maalej
Keyword(s):  
Experimental Study ◽  
Direct Contact ◽  
Membrane Distillation ◽  
Air Gap ◽  
Seawater Desalination ◽  
Direct Contact Membrane Distillation

Modeling of Air-Gap Membrane Distillation and Comparative Study with Direct Contact Membrane Distillation

2020 ◽  
Vol 59 (50) ◽  
pp. 21930-21947
Author(s):  
Sadaf Noamani ◽  
Shirin Niroomand ◽  
Masoud Rastgar ◽  
Mehdi Azhdarzadeh ◽  
Mohtada Sadrzadeh
Keyword(s):  
Comparative Study ◽  
Direct Contact ◽  
Membrane Distillation ◽  
Air Gap ◽  
Air Gap Membrane Distillation ◽  
Direct Contact Membrane Distillation

scholarly journals Seawater Desalination Based on a Bubbling and Vacuum-Enhanced Direct Contact Membrane Distillation

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Guangfu Cao ◽  
Qingfen Ma ◽  
Jingru Li ◽  
Shenghui Wang ◽  
Chengpeng Wang ◽  
...  
Keyword(s):  
Production Rate ◽  
Direct Contact ◽  
Membrane Distillation ◽  
Published Data ◽  
Water Production ◽  
Permeate Flux ◽  
Seawater Desalination ◽  
Noncondensable Gas ◽  
Direct Contact Membrane Distillation ◽  
Water Production Rate

A Bubbling and Vacuum-enhanced direct contact membrane distillation (BVDCMD) is proposed to improve the water production rate of the direct contact membrane distillation (DCMD-)based seawater desalination process. Its heat and mass transfer mechanism are theoretically analyzed, and a CFD model is established, which is verified by the published data. Four types of the noncondensable gas, “O2,” “air,” “N2,” and “H2,” are adopted as the bubbling gas, and their process enhancements under different pressure of permeate side, temperature, and NaCl concentration of feed side and flow velocities are investigated. The results show that the permeate flux increased remarkably with the decrease in the viscosity of the bubbling gas, and hence, “H2” is the best option for the bubbling gas, with the permeate flux being enhanced by 144.11% and the effective heat consumption being increased by 20.81% on average. The effective water production rate of BVDCMD is predicted to be 42.38% more than that of DCMD, proving its feasibility in the seawater desalination.

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