scholarly journals Electrochemical Ion Pumping Device for Blue Energy Recovery: Mixing Entropy Battery

2020 ◽  
Vol 10 (16) ◽  
pp. 5537
Author(s):  
Felipe Galleguillos ◽  
Luis Cáceres ◽  
Lindley Maxwell ◽  
Álvaro Soliz
Keyword(s):  
Salinity Gradient ◽  
Renewable Energy Sources ◽  
Relevant Information ◽  
Natural Systems ◽  
Mixing Entropy ◽  
Gradient Energy ◽  
Technological Means ◽  
Materials Used ◽  
Ion Pumping ◽  
Mixing Water

In the process of finding new forms of energy extraction or recovery, the use of various natural systems as potential clean and renewable energy sources has been examined. Blue energy is an interesting energy alternative based on chemical energy that is spontaneously released when mixing water solutions with different salt concentrations. This occurs naturally in the discharge of rivers into ocean basins on such a scale that it justifies efforts for detailed research. This article collects the most relevant information from the latest publications on the topic, focusing on the use of the mixing entropy battery (MEB) as an electrochemical ion pumping device and the different technological means that have been developed for the conditions of this process. In addition, it describes various practices and advances achieved by various researchers in the optimization of this device, in relation to the most important redox reactions and the cathode and anodic materials used for the recovery of blue energy or salinity gradient energy.

Performance of a mixing entropy battery alternately flushed with wastewater effluent and seawater for recovery of salinity-gradient energy

2014 ◽  
Vol 7 (7) ◽  
pp. 2295-2300 ◽  
Author(s):  
Meng Ye ◽  
Mauro Pasta ◽  
Xing Xie ◽  
Yi Cui ◽  
Craig S. Criddle
Keyword(s):  
Salinity Gradient ◽  
Wastewater Effluent ◽  
Mixing Entropy ◽  
Gradient Energy

Salinity-gradient energy can be recovered (68% efficiency) with a mixing entropy battery alternately flushed with wastewater effluent and seawater.

Potential of Electricity Generation by the Salinity Gradient Energy Conversion Technologies in the System of Urmia Lake-Gadar Chay River

2014 ◽  
Author(s):  
Arash Emdadi ◽  
Yunus Emami ◽  
Mansour Zenouzi ◽  
Amir Lak ◽  
Behzad Panahirad ◽  
...  
Keyword(s):  
River Flow ◽  
Salinity Gradient ◽  
Renewable Energy Sources ◽  
Electrical Power ◽  
Urmia Lake ◽  
Reverse Electrodialysis ◽  
Pressure Retarded Osmosis ◽  
Technical Potential ◽  
Gradient Energy ◽  
Conversion Technologies

Energy production from salinity gradients is one of the developing renewable energy sources, and has significant potential for satisfying electrical demands. Urmia Lake is the second hyper-saline lake in the world and there is a significant salinity gradient between the lake’s water and the waters of those rivers that flow into the lake. A methodology for determining the feasibility for electrical production using Salinity Gradient Power (SGP) is developed for two different types of systems using this location as an example. Reverse Electrodialysis (RED) and Pressure Retarded Osmosis (PRO), The Gadar Chay River is one of thirteen rivers that run into Urmia Lake; it supports about 10% of the lake’s water. In this study, important parameters such as river discharge and the salinity content of river and lake’s waters for several years were investigated. The theoretical and technical potential of salinity gradient energy was also determined. These calculations indicate that 206.08 MW of electrical power could be produced at this location when the river flow is approximately 29.82 m3/s and they illustrates the potential for salinity gradient energy extraction between Urmia Lake and The Gadar Chay River.

scholarly journals Development of a Low-Cost Data Acquisition System for Very Short-Term Photovoltaic Power Forecasting

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6075
Author(s):  
Guilherme Fonseca Bassous ◽  
Rodrigo Flora Calili ◽  
Carlos Hall Barbosa
Keyword(s):  
Low Cost ◽  
Renewable Energy Sources ◽  
Relevant Information ◽  
Acquisition System ◽  
Time Operation ◽  
Detection Point ◽  
Real Time Operation ◽  
Forecast Models ◽  
Input Variables ◽  
Power Forecasting

The rising adoption of renewable energy sources means we must turn our eyes to limitations in traditional energy systems. Intermittency, if left unaddressed, may lead to several power-quality and energy-efficiency issues. The objective of this work is to develop a working tool to support photovoltaic energy forecast models for real-time operation applications. The current paradigm of intra-hour solar-power forecasting is to use image-based approaches to predict the state of cloud composition for short time horizons. Since the objective of intra-minute forecasting is to address high-frequency intermittency, data must provide information on and surrounding these events. For that purpose, acquisition by exception was chosen as the guiding principle. The system performs power measurements at 1 Hz frequency, and whenever it detects variations over a certain threshold, it saves the data 10 s before and 4 s after the detection point. A multilayer perceptron neural network was used to determine its relevance to the forecasting problem. With a thorough selection of attributes and network structures, the results show very low error with R2 greater than 0.93 for both input variables tested with a time horizon of 60 s. In conclusion, the data provided by the acquisition system yielded relevant information for forecasts up to 60 s ahead.

Reverse electrodialysis in bilayer nanochannels: salinity gradient-driven power generation

2018 ◽  
Vol 20 (10) ◽  
pp. 7295-7302 ◽  
Author(s):  
Rui Long ◽  
Zhengfei Kuang ◽  
Zhichun Liu ◽  
Wei Liu
Keyword(s):  
Power Generation ◽  
Energy Harvesting ◽  
Salinity Gradient ◽  
Reverse Electrodialysis ◽  
Gradient Energy ◽  
Ion Transportation

To evaluate the possibility of nano-fluidic reverse electrodialysis (RED) for salinity gradient energy harvesting, we consider the behavior of ion transportation in a bilayer cylindrical nanochannel with different sized nanopores connecting two reservoirs at different NaCl concentrations.

Review—Technologies and Materials for Water Salinity Gradient Energy Harvesting

2021 ◽  
Author(s):  
Xiong-Wei Han ◽  
Wei-Bin Zhang ◽  
Xue-Jing Ma ◽  
Xia Zhou ◽  
Qiang Zhang ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Salinity Gradient ◽  
Water Salinity ◽  
Gradient Energy
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