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Full-Text Articles in Engineering
Recent Advancements In The Application Of New Monomers And Membrane Modification Techniques For The Fabrication Of Thin Film Composite Membranes: A Review, Javad Farahbakhsh, Vahid Vatanpour, Mahsa Khoshnam, Masoumeh Zargar
Recent Advancements In The Application Of New Monomers And Membrane Modification Techniques For The Fabrication Of Thin Film Composite Membranes: A Review, Javad Farahbakhsh, Vahid Vatanpour, Mahsa Khoshnam, Masoumeh Zargar
Research outputs 2014 to 2021
Thin film composite (TFC) membranes have been experiencing significant modifications recently aiming to improve their structure, properties and separation efficiency. One of the promising modifications to tailor the membranes more efficient is changing the materials used. m-phenylene diamine (MPD), piperazine (PIP), and trimesoyl chloride (TMC) are the most common monomers used to fabricate TFC membranes. Recent studies have introduced several alternatives to these traditional monomers showing significant contribution of these monomers to the physicochemical properties of the membranes (e.g., surface roughness, hydrophilicity, cross-linking density, chemical structure) as well as membranes' separation efficiency. Emergence of more favorable functional groups such as …
Imaging Of Membrane Concentration Polarization By Nacl Using 23na Nuclear Magnetic Resonance, Masoumeh Zargar, Ryuta Ujihara, Sarah J. Vogt, Johannes S. Vrouwenvelder, Einar O. Fridjonsson, Michael L. Johns
Imaging Of Membrane Concentration Polarization By Nacl Using 23na Nuclear Magnetic Resonance, Masoumeh Zargar, Ryuta Ujihara, Sarah J. Vogt, Johannes S. Vrouwenvelder, Einar O. Fridjonsson, Michael L. Johns
Research outputs 2014 to 2021
Forward osmosis (FO) and reverse osmosis (RO) membrane processes differ in their driving forces: osmotic pressure versus hydraulic pressure. Concentration polarization (CP) can adversely affect both performance and lifetime in such membrane systems. In order to mitigate against CP, the extent and severity of it need to be predicted more accurately through advanced online monitoring methodologies. Whilst a variety of monitoring techniques have been used to study the CP mechanism, there is still a pressing need to develop and apply non-invasive, in situ techniques able to produce quantitative, spatially resolved measurements of heterogeneous solute concentration in, and adjacent to, the …
A Multipurpose Desalination, Cooling, And Air-Conditioning System Powered By Waste Heat Recovery From Submarine Diesel Exhaust Fumes And Cooling Water, Abdellah Shafieian, Mehdi Khiadani
A Multipurpose Desalination, Cooling, And Air-Conditioning System Powered By Waste Heat Recovery From Submarine Diesel Exhaust Fumes And Cooling Water, Abdellah Shafieian, Mehdi Khiadani
Research outputs 2014 to 2021
The role of cooling and air-conditioning systems in submarines is assessed as indispensable, and a reliable water supply is essential for both crew and equipment. At the same time, the large amounts of high-temperature exhaust fumes discharged from submarine engines provide an excellent opportunity to recover and apply this waste energy in required applications. This paper introduces a novel multipurpose desalination, cooling, and air-conditioning system to recover waste heat from both the exhaust fumes and the cooling water of submarine engines. The whole system is mathematically modelled and analysed based on the actual thermo-physical parameters of the engine's exhaust fumes. …
Performance Analysis Of A Thermal-Driven Tubular Direct Contact Membrane Distillation System, Abdellah Sharifian, Mehdi Khiadani, Ataollah Nosrati
Performance Analysis Of A Thermal-Driven Tubular Direct Contact Membrane Distillation System, Abdellah Sharifian, Mehdi Khiadani, Ataollah Nosrati
Research outputs 2014 to 2021
This paper examines the performance of a thermal-driven tubular direct contact membrane distillation (DCMD) system theoretically and experimentally. A multi-step mathematical model was developed to predict the freshwater productivity of the tubular DCMD module applicable for both small and large-scale applications by considering the changes in the operational variables along the membrane’s length. The proposed model was verified by building an experimental rig which was tested under different operational conditions. The results showed that keeping the mass flow rates in the hot and cold channels either near the end or beyond the transition range of the flows results in higher …