IIUM Repository (IREP)

Experimental study on a multi-stage air gap membrane distillation (AGMD) unit

Bahar, Rubina and Hawlader, Mohammad Nurul Alam and Ng, K. C. and Yee, Jiun Haw (2014) Experimental study on a multi-stage air gap membrane distillation (AGMD) unit. Jurnal Teknologi, 69 (9). pp. 89-92. ISSN 2180–3722 (O), 0127–9696 (P)

[img] PDF - Published Version
Restricted to Repository staff only

Download (759kB) | Request a copy

Abstract

Membrane distillation (MD) is a separation process that involves vapour transport through a hydrophobic membrane. The evaporation is caused by the partial pressure difference between a hot fluid and cold fluid/surface. In this study, an air gap MD (AGMD) process is utilized to produce freshwater from saline solution. A multi-stage AGMD unit with 0.45 micro-m pore size Polyvinylidene Fluoride (PVDF) membranes is built and experiments have been carried out with different operating variables including feed temperature, coolant temperature, air gap width and feed inlet concentration. A maximum of 12.9 kg/m2 of distillate flux was obtained per kWh energy input from the multi-stage MD unit while for a previously built single-stage MD unit, the highest water/power ratio obtained was only 2.3 kg /m2 kWh. This variation indicates that multistaging is necessary for efficient energy use in MD system.

Item Type: Article (Journal)
Additional Information: 7007/39101
Uncontrolled Keywords: Air gap membrane distillation (AGMD); hydrophobic membrane; PVDF membrane; multi-stage membrane distillation; energy efficiency; water/power ration
Subjects: T Technology > TD Environmental technology. Sanitary engineering > TD201 Water supply for domestic and industrial purposes
T Technology > TJ Mechanical engineering and machinery > TJ163.26 Energy conservation
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering
Depositing User: Dr Rubina Bahar
Date Deposited: 13 Nov 2014 01:40
Last Modified: 06 Sep 2017 07:38
URI: http://irep.iium.edu.my/id/eprint/39101

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year