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Feedback control for distributed heat transfer mechanisms in direct-contact membrane distillation system
2015
2015 IEEE Conference on Control Applications (CCA)
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In this paper, the problem of stabilization and production rate reference tracking for a Direct-Contact Membrane Distillation (DCMD) system is addressed. ...
Index Terms-Direct-Contact Membrane Distillation (DCMD), feedback stabilization, reference output tracking, static state feedback, observers design, observer based output feedback, LMIs. ...
The most popular configuration for MD is Direct-Contact Membrane Distillation (DCMD), where both the feed and permeate solutions are in direct contact with the membrane sides. ...
doi:10.1109/cca.2015.7320842
dblp:conf/IEEEcca/EleiwiNL15
fatcat:xrldhmeqw5e7vj7uaevhlfvmg4
A feedback control system with reference governor for a solar membrane distillation pilot facility
2018
Renewable Energy
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This work presents the development of a feedback control system for a pilot membrane distillation facility powered with solar energy located at Plataforma Solar de Almería (PSA), Spain. ...
Four direct control schemes based on Proportional Integral (PI) controllers and Feedforward (FF) are designed as well as a reference governor which generates temperature references for the heat generation ...
In [12] steady-state simulations, using a wide range of operating conditions, were carried out for a direct contact mem-30 brane distillation system. ...
doi:10.1016/j.renene.2017.12.107
fatcat:rtyp63fvwfaorff6ueg5kk6nae
Membrane Distillation Process Modeling: Dynamical Approach
2014
Zenodo
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System performance and parameters can be optimized and controlled using this complete dynamic model. ...
A 2D advection-diffusion equation for modeling the whole process and a modified heat equation for modeling the membrane itself. ...
Noreddine Ghaffour and Water desalination and reuse center (WDRC) in KAUST for timely and useful discussion during the process of this work. ...
doi:10.5281/zenodo.1093114
fatcat:dx7novto3zhqjofkasrreypvay
State observer design for Direct Contact Membrane Distillation Parabolic systems
2018
2018 Annual American Control Conference (ACC)
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This paper proposes a state observer for a coupled two dimensional partial differential equations (PDEs) system used to describe the heat transfer in a membrane distillation system for water desalination ...
The mathematical model based on reaction-diffusion system is introduced. Sufficient conditions for the exponential convergence of the estimation error is presented using Lyapunov method. ...
The estimation performance is illustrated through a numerical example in Section 4.
II. DIRECT CONTACT MEMBRANE DISTILLATION SYSTEM
A. ...
doi:10.23919/acc.2018.8431155
dblp:conf/amcc/GhattassiVL18
fatcat:mubsjtjhz5ai5hcl7gvwujxts4
DISTILLATION | Historical Development
[chapter]
2000
Encyclopedia of Separation Science
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Many other examples of membrane}distillation systems can be found in the literature. ...
), and hybrid systems of membranes (or other techniques) with distillation. 2. ...
doi:10.1016/b0-12-226770-2/04721-9
fatcat:ppjcalt6jndj7h7eedlkn5j2ly
Industrial Membrane Processes for the Removal of VOCs from Water and Wastewater
2019
International Journal of Engineering and Applied Sciences (IJEAS)
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Emerging membrane technologies such as pervaporation (PV) and membrane distillation (MD) gained scientists' attention as a promising way for water treatment. ...
and vacuum membrane distillation (VMD). ...
Childress (from the University of Southern California) for her invaluable feedback and discussions during the MS coursework which greatly refined the research work. ...
doi:10.31873/ijeas/6.4.2019.09
fatcat:e4ctjrlprjblnalpqimghneo6q
Process intensification
2018
Reviews in chemical engineering
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Its tools are reduction of the number of devices (integration of several functionalities in one apparatus), improving heat and mass transfer by advanced mixing technologies and shorter diffusion pathways ...
Starting from fundamental definitions, microfluidic technology, mixing, modern distillation techniques, membrane separation, continuous chromatography, and application of gravitational, electric, and magnetic ...
Fieg (TU Hamburg) for reading this paper and their useful comments. The author is also grateful to Mrs. H. Oppelaar for writing the text and preparing the figures. ...
doi:10.1515/revce-2017-0085
fatcat:46l2im4425bclj774qfcfqr5hu
Thermodynamic Design and Fouling of Membrane Distillation Systems
[article]
2017
arXiv
pre-print
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One such developing technology, membrane distillation (MD), has experienced keen academic interest and an increase in start-up businesses in the past decade. ...
The aim of this research is to better understand and provide solutions for two major challenge areas for MD: efficiency and membrane fouling. ...
Several configurations have been designed for MD, including the most commonly, Direct Contact Membrane Distillation (DCMD) and Air Gap Membrane Distillation (AGMD), as well as Vacuum Membrane Distillation ...
arXiv:1711.07348v1
fatcat:sdrv56jjlbfm3hamynjky2ppey
Influence of inlet pressure and geometric variations on the applicability of Eductor in low temperature thermal desalinations
2021
Journal of King Saud University: Engineering Sciences
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This paper explores the potential of water jet eductor to replace large condensers and vacuum pump in the thermal desalination systems, with heat source temperatures below 95°C. ...
The operational limit of eductor has been investigated for active vapor transport and condensation to produce permeate. ...
In an Eductor, at low pressure zone of primary fluid passage, secondary fluid entrains, and subsequently direct contact heat and mass transfer occurs. ...
doi:10.1016/j.jksues.2021.03.012
fatcat:rjqfpecy5nhmvbjmxvungyhwty
Optimal operation of a Solar Membrane Distillation pilot plant via Nonlinear Model Predictive Control
2018
Computers and Chemical Engineering
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In this paper, a hierarchical control system composed by two layers is used for optimizing the operation of a SMD pilot plant, in terms of thermal efficiency, distillate production and cost savings. ...
The lower layer includes a direct control system, in charge of attaining the variable references provided by the upper layer. ...
The most 85 adopted configurations are Direct Contact Membrane Distillation (DCMD), Permeate Gap Membrane Distillation (PGMD) and AGMD, in which condensation takes place inside the module, and Sweeping ...
doi:10.1016/j.compchemeng.2017.11.012
fatcat:ivc4r7jbmfe77ezl4j3ylorjlu
Solar-assisted membrane technology for water purification: a review
2020
Journal of Water Reuse and Desalination
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osmosis, electrodialysis, membrane distillation, and hybrid membrane systems. ...
Membrane-based water purification technologies play a major role in water purification by utilization of low-cost heat sources to make the process economically and technically viable for small, medium, ...
to the KU Leuven and Bahir Dar University, Bahir Dar Institute of Technology, for providing necessary resources and support for this review paper. ...
doi:10.2166/wrd.2020.049
fatcat:qv6pjk3csnawtkyoutt5vzwwne
Degrees of freedom of equipment and processes
1994
Chemical Engineering Science
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Simple equations are derived to carry out degree of freedom analyses quickly and almost mechanically, using easily countable physical entities. ...
It is shown that the outlet stream freedom does not depend on the number of component substances, and in many cases not on the number of phases. ...
Heat transfer may be direct via a heat exchanger, or indirect via any number of intermediate fluids. ...
doi:10.1016/0009-2509(94)e0056-v
fatcat:g63uuuyqnfcz7jzlleyf3i3hwe
Recent Developments in Solar Thermal Desalination Technologies: A Review
2018
Energies
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Fresh water resources are also not equally distributed geographically worldwide. ...
The best way to tackle this situation is to use solar energy for desalination to not only cater for the water needs of humanity, but also to offset some detrimental environmental effects of desalination ...
his contribution in proof reading the manuscript. ...
doi:10.3390/en12010119
fatcat:5tnqwb4ajzhbziziicr4u2sw7u
Experimental and theoretical analyses of temperature polarization effect in vacuum membrane distillation
2014
Journal of Membrane Science
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The coupling between heat and mass transfer mechanisms at the feed-membrane interface is presented from a theoretical point of view. ...
The main motivation for using VMD in this work is that this module configuration is much simpler and more suitable for this kind of investigation than the other MD configurations such as Direct Contact ...
They studied the temperature polarization effect in direct contact membrane distillation (DCMD) configuration, evaluated the relative effect of temperature and concentration polarizations on MD flux, introduced ...
doi:10.1016/j.memsci.2014.08.005
fatcat:b5tdj2hstvfmveeu6rmber5ol4
Optimal Control of Direct Contact Membrane Distillation Operated under Fluctuating Energy Source
2022
Membranes
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An optimal control strategy was tested to regulate the flow rate of the cold stream to maximize the time-averaged water production of a laboratory-scale membrane distillation (MD) process. ...
By modifying the control strategy to adapt the membrane length in addition to the flow rate of the cold stream, highly improved performance could be obtained. ...
In other words, adjustment of the heat and mass transfer was ineffective for a long membrane with a low flow rate ratio. ...
doi:10.3390/membranes12060628
pmid:35736335
pmcid:PMC9230371
fatcat:imdcm4trnner3oi4r6wrstzyla
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