scholarly journals A Wind-Wave Farm System With Self-Energy Storage and Smoothed Power Output

IEEE Access ◽  
2016 ◽  
Vol 4 ◽  
pp. 8634-8642 ◽  
Author(s):  
Xianxian Zhao ◽  
Zuanhong Yan ◽  
Xiao-Ping Zhang
Keyword(s):  
Energy Storage ◽  
Power Output ◽  
Wind Wave ◽  
Self Energy ◽  
Wave Farm ◽  
Farm System

Numerical optimization of hybrid wind-wave farm layout located on Egyptian North Coasts

2021 ◽  
Vol 234 ◽  
pp. 109260
Author(s):  
Abdallah M. Ragab ◽  
Ahmed S. Shehata ◽  
A.H. Elbatran ◽  
Mohamed A. Kotb
Keyword(s):  
Numerical Optimization ◽  
Wind Wave ◽  
Wave Farm

Coupling anodic/cathodic energy storage through in-situ heterostructure regulation of ordered microporous carbon for sodium-ion hybrid capacitors

2021 ◽  
Author(s):  
Juan Li ◽  
Bo Wang ◽  
Tianzhao Hu ◽  
Yuzuo Wang ◽  
Zhenhua Sun ◽  
...  
Keyword(s):  
Energy Storage ◽  
Power Output ◽  
Microporous Carbon ◽  
Sodium Ion ◽  
Faradaic Reaction ◽  
Hybrid Capacitors

Sodium-ion hybrid capacitors are emerging as the promising energy storage and power output devices. However, they suffer from sluggish faradaic reaction of anode and low capacity of cathode. Zeolite-templated carbons...

Leakage flow characteristic of radial inflow turbine adopted in CAES system: Review on progress

2021 ◽  
pp. 095440622110276
Author(s):  
Xing Wang ◽  
Xuehui Zhang ◽  
Yangli Zhu ◽  
Ziyi Shao ◽  
Wen Li ◽  
...  
Keyword(s):  
Energy Storage ◽  
Power Output ◽  
Flow Characteristic ◽  
Tip Clearance ◽  
Inlet Temperature ◽  
Leakage Flow ◽  
Operation Condition ◽  
Loss Mechanism ◽  
Flow Loss ◽  
Radial Inflow Turbine

Compressed Air Energy Storage (CAES) System is an important power output component of the energy storage technology. Radial inflow turbine is the main power output device in CAES system, it is operated at extraordinary operation condition (inlet pressure ≥ 75 bar and inlet temperature < 500 K) which is different from gas turbine and other turbomachinery. Therefore, clearance existing in the CAES radial inflow turbine will result in special leakage flow characteristic and higher flow loss, which decreases the aerodynamic performance and the economic efficiency of the CAES system. However, most of researches for CAES radial inflow turbine mainly focus on the performance prediction of CAES system with one-dimensional model, the detailed leakage flow loss mechanism based on three-dimensional analysis, which significantly influences the flow structure and efficiency, are still needed to be further conducted. In present study, the progress on leakage flow characteristic in the CAES radial inflow turbine is reviewed. The effects of tip clearance, case-shroud clearance and back cavity of rotors are summarized, the leakage flow mechanism and loss reduction method are also analyzed and discussed. Suggestions for the future work on leakage flow of CAES radial inflow turbine are also proposed. The present review can provide a guide for new design and optimization of the radial inflow turbine adopted in CAES system.

Energy Storage Control Based on Wind Farm

2012 ◽  
Vol 268-270 ◽  
pp. 933-936
Author(s):  
Xiao Dong Wang ◽  
Jin Hua Zhu ◽  
Ying Ming Liu ◽  
Hong Fang Xie
Keyword(s):  
Energy Storage ◽  
Wind Farm ◽  
Storage System ◽  
Energy Storage System ◽  
Network Capacity ◽  
Vanadium Redox Flow Battery ◽  
Energy Management Strategy ◽  
Storage Unit ◽  
Energy Storage Unit ◽  
Farm System

With the increase in wind power generation and network capacity, Wind farm power fluctuations on the grid greatly. In order to improve the operational stability of wind farm grid, at its outlet to increase the energy storage system for the new environmentally friendly vanadium redox flow battery (VRB) to effectively regulate the grid power. According to the VRB equivalent mathematical model using a bidirectional DC/AC converter as VRB storage system power regulator, the corresponding charge discharge control and energy management strategy are designed , and grid-connected wind farm system with VRB energy storage unit are modeled and simulated. Simulation results show that the fluctuations in wind speed Circumstances, the VRB energy storage system can quickly and effectively smooth the fluctuations of the active power of the wind farm output, and can provide reactive support to the grid, effectively improve the operating performance of wind farm.

scholarly journals Layout Optimization Process to Minimize the Cost of Energy of an Offshore Floating Hybrid Wind–Wave Farm

Processes ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 139 ◽  
Author(s):  
Jorge Izquierdo-Pérez ◽  
Bruno M. Brentan ◽  
Joaquín Izquierdo ◽  
Niels-Erik Clausen ◽  
Antonio Pegalajar-Jurado ◽  
...  
Keyword(s):  
Wind Wave ◽  
Pso Algorithm ◽  
Calculation Model ◽  
Optimization Process ◽  
Cost Of Energy ◽  
Decision Variables ◽  
Decision Making Processes ◽  
A Site ◽  
The Cost ◽  
Wave Farm

Offshore floating hybrid wind and wave energy is a young technology yet to be scaled up. A way to reduce the total costs of the energy production process in order to ensure competitiveness in the sustainable energy market is to maximize the farm’s efficiency. To do so, an energy generation and costs calculation model was developed with the objective of minimizing the technology’s Levelized Cost of Energy (LCOE) of the P80 hybrid wind-wave concept, designed by the company Floating Power Plant A/S. A Particle Swarm Optimization (PSO) algorithm was then implemented on top of other technical and decision-making processes, taking as decision variables the layout, the offshore substation position, and the export cable choice. The process was applied off the west coast of Ireland in a site of interest for the company, and after a quantitative and qualitative optimization process, a minimized LCOE was obtained. It was then found that lower costs of ~73% can be reached in the short-term, and the room for improvement in the structure’s design and materials was highlighted, with an LCOE reduction potential of up to 32%. The model serves usefully as a preliminary analysis. However, the uncertainty estimate of 11% indicates that further site-specific studies and measurements are essential.

Performance investigation of a novel near‐isothermal compressed air energy storage system with stable power output

2020 ◽  
Vol 44 (14) ◽  
pp. 11135-11151
Author(s):  
Pan Zhao ◽  
Yongquan Lai ◽  
Wenpan Xu ◽  
Shiqiang Zhang ◽  
Peizi Wang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Power Output ◽  
Storage System ◽  
Energy Storage System ◽  
Compressed Air ◽  
Compressed Air Energy Storage

scholarly journals Coordinated control strategy of DC microgrid with hybrid energy storage system to smooth power output fluctuation

2019 ◽  
Vol 15 (1) ◽  
pp. 46-54 ◽  
Author(s):  
Tiezhou Wu ◽  
Fanchao Ye ◽  
Yuehong Su ◽  
Yubo Wang ◽  
Saffa Riffat
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Power Output ◽  
Storage System ◽  
Energy Storage System ◽  
Energy Structure ◽  
Dc Microgrid ◽  
Hybrid Energy ◽  
Hybrid Energy Storage ◽  
Hybrid Energy Storage System

Abstract As the fossil energy crisis and environmental pollution become more and more serious, clean renewable energy becomes the inevitable choice of energy structure adjustment. The power system planning and operation has been greatly influenced by the instability of the power output of distributed renewable energy systems such as solar energy and wind energy. The hybrid energy storage system composed of accumulator and supercapacitor can solve the above problems. Based on the analysis of the energy storage requirements for the stable operation of the DC microgrid, battery–supercapacitor cascade approach is adopted to form hybrid energy storage system, in a single hybrid energy storage subsystem for battery and supercapacitor and in the microgrid system of different hybrid energy storage subsystem, respectively, and puts forward the corresponding power allocation method to realize the smooth control of the battery current, to reduce the battery charge and discharge times, to prolong the service life of battery and to improve the running stability of the microgrid.

Cooling of Gas Turbines Inlet Air Through Aquifer Thermal Energy Storage

2006 ◽  
Author(s):  
Mehdi N. Bahadori ◽  
Farhad Behafarid
Keyword(s):  
Energy Storage ◽  
Gas Turbine ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Power Output ◽  
Gas Turbines ◽  
Confined Aquifer ◽  
Viable Option ◽  
Aquifer Thermal Energy Storage ◽  
The Mean

The power output of gas turbines reduces greatly with the increase of inlet air temperature. Aquifer thermal energy storage (ATES) is employed for cooling of the inlet air of a gas turbine. Water from a confined aquifer is cooled in winter, and is injected back into the aquifer. The stored chilled water is withdrawn in summer to cool the gas turbine inlet air. The heated water is then injected back into the aquifer. A 20 MW Hitachi gas turbine, along with a two-well aquifer were considered for analysis. It was shown that the minimum power output of the gas turbine on the warmest day of the year could be raised from 16.30 to 20.05 MW, and the mean annual power output could be increased from 19.1 to 20.1 MW, and the efficiency from 32.52% to 34.54% on the warmest day of the year and the mean annual efficiency from 33.88% to 34.52%. The use of ATES is a viable option for the increase of gas turbines power output, provided that suitable confined aquifers are available at their sites.

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