Desalination by freeze crystallization is a freezing-melting process in which water crystallized to ice and separated from saline solution. This area observing renascence mitigate the staggering sea rejected brine that has negative environmental impact. Phase diagram of NaCl-H2O key point designing desalination systems. All methods follow same process, starting nucleation, crystal growth, separation, finally melting. Direct contact, indirect vacuum, eutectic are basic crystallization....

Abstract Membrane fouling and temperature polarization are the most common issues that cause limitations to membrane distillation (MD) process. Integration of spacers has been proven resolve those problems by inducing regions turbulence giving required mechanical support membrane. In this work, a robust high-fidelity computational fluid dynamics simulation is carried out assess quantify performance spacer-filled DCMD module compare it with baseline spacer-free module. Mainly, simulations...

As wind energy technology is growing rapidly in the production sector, Vertical Axis Wind Turbines (VAWTs) are coming to fore tackle areas with low speeds. The choice of optimum configuration these VAWTs can not only maximize their performance but a deterministic feasibility factor for deployment. In this study, Joukowski airfoil reconsidered as potential rotor VAWT. Its compared against classical symmetrical NACA0012 and cambered NACA4312 blades. investigation carried out using high...

World energy demand increases every year and production from conventional sources, such as fossil fuels leads to environmental degradation global warming. To counter these adverse effects more efforts are being made harvest clean renewable sources. This work focuses on an harvester that operates flow-induced vibrations. Any structure exposed fluid flow may experience vibrations the can be harvested. is a numerical study where of downstream cylinder in wake identical studied. The upstream...

The amount of refinery water discharged to the environment from oil industry has increased vigorously in current times. Recent research been focusing on use membrane technology for processed treatment. Membrane Distillation (MD) is an emerging that highly marked by its low-energy requirement and high desalination efficiency. However, conventional MD membranes ( i.e. PVDF) are not feasible oil-water separation processes. That due oleo-philic property thus, causes fouling halts production mass...

Thermal conductivity is one of the most influencing DCMD performance parameters. Having larger value in membrane results lower thermal efficiency and mass flux. However, increasing fluid, membrane's surfaces, or by means higher conductive gap have reported unique improvements DCMD. In this work, computational fluid dynamics (CFD) has been used to evaluate role highly spacers on a direct contact distillation (DCMD) system. The cylindrical shape spacer considered work which placed directly...

Attaining water sustainability is crucial, while the failure to address challenges of current desalination processes, i.e. high energy demand and cost negatively affects global development goals. Freeze (FD) technology has a great potential overcome such as it needs only 20% required by conventional thermal processes. FD crystallization-based where freshwater separated from saline mixture in forms ice crystals cooling. In this work, high-fidelity numerical simulation indirect process...

The main purpose of salinity gradient solar ponds (SGSPs) is to store the maximum possible thermal energy. A well-established and temperature gradients are points achieved optimum storage efficiency. In this work, a high-fidelity model developed using computational fluid dynamics (CFD) simulate SGSP behavior under hot climate regions. able double convective effect by solving Navier-Stokes energy equations, simultaneously. Brines with different salinities (i.e. 10%,15, 25%) used investigate...

In this work, we propose a standalone portable desalination unit that is based on direct contact membrane distillation (DCMD) technology and powered by hybrid solar energy. The novel dual channel DCMD module enables reserving the compact size of high production rates. has net area 0.042-m2 evaluated under several feed temperatures using both ideal assumptions practical computational fluid dynamics (CFD) validated modeling. Results shows at temperature 40°C permeate 25°C, can produce 2.31...

The discrepancies between mass flux prediction models is a major issue in membrane distillation (MD) literature.Computational fluid dynamics model was used to capture the driving pressure gradient across using range of inlet feed temperatures and flow velocities.Hence, comparison most pronounced presented.Validation error estimation those done recent literature experimental work.Results revealed that all current follow reserve same trend actual flux.Nevertheless, merges higher estimated when...

Greenhouse (GH) has been demonstrated as a profitable technology for food production with low demand of irrigation water.In this work, numerical model is developed to study the micro-climatic environmental conditions inside greenhouse distillation system optimize operation.The performance (temperatures, flow velocities, relative humidity) presented and improvement factors are suggested.The result shows that inlet velocity plant transpiration have more pronounced effect on humidity than...

Salinity-gradient solar ponds (SGSP) are water bodies that serves as a thermal energy storage system.Establishing salinity gradient and observing the role of gravity diffusion between different zones is key-point in achieving optimal system performance.In this work, numerical model developed using computational fluid dynamics (CFD) acting an initial step designing building pond located Masdar City for usage space cooling desalination.The governed by continuity, species transport, momentum,...

Abstract Freeze crystallization presents an innovative thermal desalination technology whereby water is separated from salts in brine solution through freezing, commonly known as freeze (FD). This work a comprehensive Computational Fluid Dynamics (CFD) investigation aimed at optimizing the design of Continuous Suspension Crystallizer (CSFC) for seawater treatment. The approach involves dual-level methodology, comprising non-isothermal geometrical optimization and ice evaluation. Geometrical...