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- Journal Article:
Erinofiardi et al.
Potential energy from fluid flow of small rivers or irrigations could be extracted become electricity by using screw turbine. This turbine is promising because the advantages of ultra-low head and fish friendly.Experimental performance of screw turbine for ultra-low head hydro resource is presented in this paper. The screw turbine with anoutside diameter of 142 mm and the water flowrate of 1.2…
- Journal Article:
Badawy et al.
River current energy is regarded as one of the most environmentally friendly sources of electricity. Because it doesn't produce power by holding water in a reservoir and causing a height differential, a river current (or hydrokinetic) device is not a dam. Turbines placed inside rivers immediately harvest the kinetic energy of flowing water. Like Egypt's river Nile can be used to study this…
- Journal Article:
Mai et al.
Renewable energy development is one of the most promising approaches for tackling global warming, fulfilling the ever-increasing energy demand, and protecting the environment. Among the various renewable energy sources available nowadays, salinity gradient energy, also known as blue energy, is regarded as a particularly attractive solution for the generation of sustainable clean energy and has…
- Journal Article:
Solberg et al.
The reverse electrodialysis heat engine (REDHE) is a promising salinity gradient energy technology, capable of producing hydrogen with an input of waste heat at temperatures below 100°C. A salinity gradient drives water electrolysis in the reverse electrodialysis (RED) cell, and spent solutions are regenerated using waste heat in a precipitation or evaporation unit. This work presents a non-…
- Journal Article:
Sharma et al.
Salinity gradient energy is a clean source of renewable energy, which can be harnessed from a region where fresh river water connects to a hypersaline sea or lake. The funnel shaped Hooghly Estuarine river system connects to comparatively more saline Bay of Bengal. This change in salinity can be used to extract salinity gradient energy. Here, analyses has been done on the energy potential due…
- Journal Article:
Guo et al.
While concentrated seawater discharged by desalination plants requires considerable efforts to alleviate undesired environmental risk, the conversion of salinity gradient energy to electric energy is considered an ideal way. In this work, the experiment and simulation of multi-stage reverse electrodialysis (MS-RED) were carried out, and the influence of flow rate and compartment thickness of…
- Journal Article:
Jiang et al.
Salinity gradient cells are widely used in power generation from gradient concentration solutions of one electrolyte. High ionic flux sub-micro channels membrane can offer a high current density for salinity gradient power generation with a significant power output. Herein, based on numerical simulation model with Poisson-Nernst-Planck-Navier-Stokes (PNP-NS)equations, a high ionic flux sub-…
- Journal Article:
Mao et al.
Fouling in the membrane interior of engineered large sized charged nanopores can significantly impact the transmembrane ion transportation characteristic. Here impacts of fouling characteristics on the energy conversion performance are investigated. When the fouling located near the low concentration end, the shadowing effect that decreases the effective charged surface area plays a dominant…
- Journal Article:
Lisicki et al.
The recent revival of Bayesian optimization has caused widespread utilization of easily accessible and versatile tools in different areas, which involve the search for optimal design or decisions. This method, however, has not yet been explored within the field of renewable energy systems. This study aims to introduce the main benefits of the procedure to the community through the practical…
- Journal Article:
Dellinger et al.
The Archimedean Screw Generator (ASG) allows transforming potential energy of a fluid into mechanical energy and is convenient for low-head hydraulic sites. As it is a new and growing technology with few guidelines for design and performance optimization, the present contribution proposes a new experimental and numerical investigation method for studying ASG performances. In order to study the…
- Journal Article:
Nuernbergk and Rorres
Archimedes screws have become increasingly popular throughout Europe to drive hydropower plants using residual flow from a stream or river. This heightened usage of such screws during the past few years is attributable to their robustness, simplicity, and fish friendliness. Presently the dimensioning of a hydropower site equipped with an Archimedes screw is dependent mainly on the experience…
- Journal Article:
Vermaas et al.
Renewable energy can be obtained from mixing waters with different salinity using reverse electrodialysis (RED). To obtain a high power per membrane area, combined with a low power consumption for pumping the feed water, RED is preferably operated using small intermembrane distances and low flow rates. However, the diffusive boundary layer near the membranes induces a significant (non-ohmic)…
- Journal Article:
Li et al.
This paper introduces a novel concept for a hybrid desalination system that combines reverse electrodialysis (RED) and reverse osmosis (RO) processes. In this hybrid process the RED unit harvests the energy in the form of electricity from the salinity gradient between a highly concentrated solution (e.g., seawater or concentrated brine) and a low salinity solution (e.g., biologically treated…
- Journal Article:
Leijon et al.
Some countries are facing issues on freshwater and electricity production, which can be addressed with the use of renewable energy powered desalination systems. In the following study, a reverse osmosis desalination plant powered by marine current energy converters is suggested. The marine current energy converters are designed at Uppsala University in Sweden, specifically for utilizing low…
- Journal Article:
Gilau and Small
Today, three billion people around the world have no access to clean drinking water and about 1.76 billion people live in areas already facing a high degree of water stress. This paper analyzes the cost-effectiveness of a stand alone small-scale renewable energy-powered seawater reverse osmosis (SWRO) system for developing countries. In this paper, we have introduced a new methodology; an…
- Journal Article:
Muhthassim et al.
Energy harvesting from salt water received attention started back in 1970s', but due to varying interests in the field and the growing potentials of other more promising sources, more work was required to fully establish it. This paper aims at identifying existing techniques of energy harvesting and the methodology involved determining an effective technique for small scale applications of the…
- Journal Article:
Tedesco et al.
Technologies for the exploitation of renewable energies have been dramatically increasing in number, complexity and type of source adopted. Among the others, the use of saline gradient power is one of the latest emerging possibilities, related to the use of the osmotic/chemical potential energy of concentrated saline solutions. Nowadays, the fate of this renewable energy source is…
- Journal Article:
Vermaas et al.
Reverse electrodialysis (RED) is a technology to generate power from mixing waters with different salinity. The net power density (i.e. power per membrane area) is determined by 1) the membrane potential, 2) the ohmic resistance, 3) the resistance due to changing bulk concentrations, 4) the boundary layer resistance and 5) the power required to pump the feed water. Previous power density…
- Report:
Mora and de Rijck
The global total primary energy supply and demand has doubled between 1971 and 2012, mainly relying on fossil fuels. This affects the world’s environment in aspects such as climate change and other long term effects mainly caused by the increase in quantity of greenhouse gases (GHGs) emissions. Moreover, the present constant use of combustion fuels such as oil and natural gas will result in an…
- Journal Article:
Vallejo-Castaño and Sánchez-Sáenz
A model for design of Reverse Electrodialysis stacks for energy generation is presented and solved. A new optimization function is proposed for RED, which accounts for river water consume, net power density and thermodynamic efficiency of the process. The parameters of residence time and thickness of the compartments are successfully optimized using the new proposed function. Results suggest…
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