Channeled coolant plate: A new method to enhance freshwater production from an air gap membrane distillation (AGMD) desalination unit

Bahar, Rubina; Hawlader, Mohammad Nurul Alam; Ariff, Tasnim Firdaus Mohamed

doi:10.1016/j.desal.2014.12.031

Cited by 32 publications

(10 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, the efficiency enhancement is defined as the reduction in the consumption of externally supplied heat that is not from solar-thermal conversion. These solar-heated MD membranes can also be used in AGMD systems, which do not require distilled water to initiate operation as in DCMD systems ( 106 , 107 ). Because direct solar heating on an MD membrane creates a homogeneously hot membrane surface, a potentially better configuration is multistage AGMD in which the latent heat of condensation from one stage drives the evaporation in the next stage (Fig.…”

Section: The Critical Need For Efficient Latent Heat Recoverymentioning

confidence: 99%

Pathways and challenges for efficient solar-thermal desalination

et al. 2019

View full text Add to dashboard Cite

Solar-thermal desalination (STD) is a potentially low-cost, sustainable approach for providing high-quality fresh water in the absence of water and energy infrastructures. Despite recent efforts to advance STD by improving heat-absorbing materials and system designs, the best strategies for maximizing STD performance remain uncertain. To address this problem, we identify three major steps in distillation-based STD: (i) light-to-heat energy conversion, (ii) thermal vapor generation, and (iii) conversion of vapor to water via condensation. Using specific water productivity as a quantitative metric for energy efficiency, we show that efficient recovery of the latent heat of condensation is critical for STD performance enhancement, because solar vapor generation has already been pushed toward its performance limit. We also demonstrate that STD cannot compete with photovoltaic reverse osmosis desalination in energy efficiency. We conclude by emphasizing the importance of factors other than energy efficiency, including cost, ease of maintenance, and applicability to hypersaline waters.

show abstract

Section: The Critical Need For Efficient Latent Heat Recoverymentioning

confidence: 99%

Pathways and challenges for efficient solar-thermal desalination

et al. 2019

View full text Add to dashboard Cite

show abstract

“…In fact, the concentration of feed solution is considered as factor altering the distillation process but the salt concentration in feed solution has an insignificant impact on the permeate flux at high feed flow rates due to high turbulent levels achieved at higher flow rates, which lessen the effects of the concentration polarization [10]. Furthermore, the flow rate does not have much impact on the efficiency of the system [11]. For both phases, operation time was 3 hours per experiment.…”

Section: Experimental Protocolsmentioning

confidence: 99%

Effect of Temperature and Air-Gap Width on the Desalination Efficiency of Air-Gap Membrane Distillation Module

Sơn¹,

Dũng²,

Điện³

2020

JST

View full text Add to dashboard Cite

Khử mặn nước biển là một giải pháp đầy hứa hẹn có thể được áp dụng để giải quyết vấn đề khan hiếm nước ngọt và nước sạch ở Việt Nam, đặc biệt là ở các vùng hải đảo và vùng sâu vùng xa. Gần đây, việc áp dụng các kỹ thuật chưng cất màng để khử mặn đang thu hút sự chú ý của nhiều nhà khoa học vì tính đơn giản, dễ vận hành và tiết kiệm năng lượng. Một mô-đun chưng cất màng đệm khí (AGMD) đã được chế tạo trên cơ sở màng PE mật độ thấp với kích thước 12 x 5 cm, độ xốp, chiều dày và kích thước lỗ trung bình lần lượt là là 85%, 76 µm, và 0,3 µm. Chiều dày của lớp đệm khí được kiểm soát bởi sự thay đổi số lượng tấm lưới nhựa trong buồng thấm. Kết quả thu được cho thấy chất lượng của dung dịch thấm qua màng tương đương với chất lượng của nước cất và nhiệt độ dòng cấp, chiều dày của lớp đệm khí ảnh hưởng mạnh đến hiệu quả khử mặn của mô-đun AGMD. Điều kiện tối ưu được tìm thấy là nhiệt độ dòng cấp là 60°C, chiều dày của lớp đệm khí là 5 mm, khi đó thông lượng thu hồi nước đạt 2,5 L.m-2.h-1.

show abstract

“…Bahar et al [18] designed a unique condensation surface that allows the manipulation of mass transfer by enhancing the heat transfer during condensation. Their results showed that a special cooling plate design having number of fins enhances the system performance by about 50% when compared to a flat cooling plate.…”

Section: Introductionmentioning

confidence: 99%

Application of response surface and Taguchi optimization techniques to air gap membrane distillation for water desalination—A comparative study

Khalifa

Lawal

2016

Desalination and Water Treatment

View full text Add to dashboard Cite

A B S T R A C TThe performance of an air gap membrane distillation (AGMD) system for water desalination was optimized and compared using Taguchi orthogonal design arrays and the response surface methodology (RSM) Face-Centered Central Composite Design. The variables considered in the optimization are feed flow rate, feed temperature, coolant temperature, coolant flow rate, and air gap width. Additionally, a quadratic RS-model between response and the operating parameters was developed. Analysis of variance was then use to analyze the model and the significant effect of each operating parameters on flux. Results showed that the feed temperature and the air gap width are the most influential factors controlling the permeate production. The sensitivity of the permeate flux to coolant flow rate is marginal compared to other factors. From Taguchi technique, a maximum flux of 76.046 kg/m 2 h was obtained at optimum conditions. The RSM approach produced a maximum flux of 76.998 kg/m 2 h at optimum conditions. Although both techniques predicted very similar results, the RSM gives better predictions of the influence of operating parameters on response, and it is a better tool for the optimization of AGMD system compared to Taguchi methodology.

show abstract

Channeled coolant plate: A new method to enhance freshwater production from an air gap membrane distillation (AGMD) desalination unit

Cited by 32 publications

References 25 publications

Pathways and challenges for efficient solar-thermal desalination

Pathways and challenges for efficient solar-thermal desalination

Effect of Temperature and Air-Gap Width on the Desalination Efficiency of Air-Gap Membrane Distillation Module

Application of response surface and Taguchi optimization techniques to air gap membrane distillation for water desalination—A comparative study

Contact Info

Product

Resources

About