Power generation by ocean energy

2022 ◽  
pp. 359-430
Author(s):  
Muhammad Asif Hanif ◽  
Farwa Nadeem ◽  
Rida Tariq ◽  
Umer Rashid
Keyword(s):  
Power Generation ◽  
Ocean Energy

Possibilities for a Novel Wave Power Generator Using Dielectric Elastomers

2020 ◽  
Author(s):  
S. Chiba ◽  
M. Waki ◽  
C. Jiang ◽  
K. Fujita
Keyword(s):  
Power Generation ◽  
Renewable Energy ◽  
Wave Power ◽  
Generation System ◽  
Ocean Energy ◽  
Power Generator ◽  
Energy Demands ◽  
Worldwide Population ◽  
Power Generation System ◽  
Effective Use

Abstract As industrialization, worldwide population growth, and improvements in the living standards in developing countries continue, demands for energy, food, and water, likewise surge. This in turn accelerates global warming, and its resultant extreme weather effects. Among the measures proposed to meet the growing energy demands, the use of renewable energy is gaining more and more attention. In particular, wave power generation is attracting a great deal of attention as an effective use of ocean energy. However, current wave generators are large and very expensive relative to their output. Furthermore, they cannot generate power efficiently with wave directivity, small amplitude waves and so on. For these reasons, widespread use is very limited. In order to solve these problems, this paper discusses the possibility of a recently developed wave power generator that uses a newly developed dielectric elastomer (DE) as a new way to harvest renewable energy. We also discuss the technical breakthrough of building a mega power generation system using DEs.

scholarly journals TIDAL POWER GENERATION IN GAROLIM BAY, KOREA

2012 ◽  
Vol 1 (33) ◽  
pp. 70
Author(s):  
Bumshick Shin ◽  
Kyu-Han Kim
Keyword(s):  
Power Generation ◽  
Target Area ◽  
Ocean Energy ◽  
Tidal Power ◽  
Tourism Resource ◽  
Mud Flat ◽  
Local Residents ◽  
Garolim Bay ◽  
Tidal Power Generation ◽  
Resource Effects

Among the ocean energy, tidal power generation has a great advantage on large development possibilities despite of its huge construction cost and difficulty in finding an applicable location. Furthermore, once tidal power generation is developed, various developmental benefits are expected which are not only producing semi-permanent energy but also gaining a bridge role, tourism resource effects, adjustability of flood inundation inside the bay and other multi development effects(Roger H. Charlier.,2003, John Twidell, 2006). Nevertheless, unfavorable impacts on the bay environmental have also been pointed out. The environmental problems include mud flat extinction and marine eco-system disruption. The participation of local residents is essential to resolve ecological and socioeconomic issues. In this study, the feasibility of tidal power generation is examined by reviewing the hydraulic characteristics of a target area in the Garorim bay on the west coast of Korea.

scholarly journals Electrical control strategy for an ocean energy conversion system

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Muhammad Noman ◽  
Guojie Li ◽  
Keyou Wang ◽  
Bei Han
Keyword(s):  
Power Generation ◽  
Adaptive Control ◽  
Energy Conversion ◽  
Control Strategy ◽  
Control Strategies ◽  
Robust Adaptive Control ◽  
Ocean Energy ◽  
Conversion System ◽  
Non Linear ◽  
Energy Conversion System

AbstractGlobally abundant wave energy for power generation attracts ever increasing attention. Because of non-linear dynamics and potential uncertainties in ocean energy conversion systems, generation productivity needs to be increased by applying robust control algorithms. This paper focuses on control strategies for a small ocean energy conversion system based on a direct driven permanent magnet synchronous generator (PMSG). It evaluates the performance of two kinds of control strategies, i.e., traditional field-oriented control (FOC) and robust adaptive control. The proposed adaptive control successfully achieves maximum velocity and stable power production, with reduced speed tracking error and system response time. The adaptive control also guarantees global system stability and its superiority over FOC by using a non-linear back-stepping control technique offering a better optimization solution. The robustness of the ocean energy conversion system is further enhanced by investigating the Lyapunov method and the use of a DC-DC boost converter. To overcome system complexity, turbine-generator based power take-off (PTO) is considered. A Matlab/Simulink study verifies the advantages of a non-linear control strategy for an Oscillating Water Column (OWC) based power generation system.

A Review on the Development of Tidal Energy in China

2014 ◽  
Vol 953-954 ◽  
pp. 637-649
Author(s):  
Xiao Qing Cheng ◽  
Xi Zhang ◽  
Li Xin Yi
Keyword(s):  
Power Generation ◽  
Renewable Energy ◽  
Fossil Fuels ◽  
Energy Resource ◽  
Time History ◽  
Tidal Energy ◽  
Ocean Energy ◽  
Tidal Power ◽  
Long Time ◽  
Tidal Power Generation

The global economic and social developments depend largely on fossil fuels nowadays. To cope with energy crisis and environment problems caused by consumption of fossil fuels, the renewable energy exploitation is an alternative path. As one kind of renewable ocean energy which can be applied into production, tidal energy is mainly utilized in electricity generation. China has abundant tidal energy resource, which mainly distribute in the southeast coastal areas where power supply is insufficient. China's tidal power generation started in 1958, and some experience and technologies have been accumulated from the long-time history of tidal power station construction and operation. At present, China’s tidal energy’s development and utilization are still in low level, and remain plagued by several challenges, such as high cost, and insufficiency of preferential policies and regulations. While, China's tidal power generation must be very promising in the foreseeable future, with a great deal of attention paid to the utilization of renewable energy and the perception of sustainable development.

The Overview of Wave Power Generation

2014 ◽  
Vol 614 ◽  
pp. 141-144
Author(s):  
Shi Ming Wang ◽  
Wei Zhao ◽  
Yao Li ◽  
Ka Tian
Keyword(s):  
Power Generation ◽  
Great Improvement ◽  
Energy Resources ◽  
Wave Power ◽  
Human Beings ◽  
Power Devices ◽  
Ocean Energy ◽  
Generating Sets ◽  
The World ◽  
New Energy

Now the world is running short of source and the human beings are developing different kinds of new energy resources. This article introduced and analysis several kinds of wave power devices, tells the advantage and disadvantages. There is a great improvement in the modern wave power generating sets, but still some technology bottlenecks, we should work on these challenges and make full use of the ocean energy resources with the lowest cost.

scholarly journals Simulation Data of Regional Economic Analysis of OTEC for Applicable Area

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1107
Author(s):  
Lim Seungtaek ◽  
Lee Hosaeng ◽  
Moon Junghyun ◽  
Kim Hyeonju
Keyword(s):  
Power Generation ◽  
Net Present Value ◽  
Seawater Temperature ◽  
Average Power ◽  
High Water ◽  
Economic Feasibility ◽  
Ocean Energy ◽  
Ocean Thermal Energy ◽  
Pacific Island Nations ◽  
Power Generation Cycle

To mitigate the power shortage problem in the South Pacific island nations and the equatorial area, we studied the development characteristics of ocean thermal energy conversion (OTEC) using abundant clean ocean energy. Through the simulation of open- and closed-cycle OTEC, the generation amount and its economic efficiency were compared, and the application characteristics of the power generation cycle according to the seawater temperature distribution were compared by applying various seawater temperature conditions. According to the characteristics of seawater heat sources in the region, the power generation output was about 883.2 kW in Samoa, and the average power generation by region was about 650.5 kW for the open-cycle OTEC model. Regional revenue up to approximately $8,487,000 was generated in Kiribati, driven by the higher electricity tariff of $0.327/kWh and high water costs of $5.86/ton. With the spread of 50 MW commercial plants, Kiribati had a high net present value of $1,930,402,000, and its internal rate of return was more than 37.0%. This paper is presents a method of securing economic feasibility of OTEC according to various heat source conditions and economic conditions in the region, while it also analyzes the capacity and type of the power plant.

scholarly journals Research on Hydraulic Conversion Technology of Small Ocean Current Turbines for Low-Flow Current Energy Generation

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6499
Author(s):  
Wenbin Su ◽  
Hongbo Wei ◽  
Penghua Guo ◽  
Qiao Hu ◽  
Mengyuan Guo ◽  
...  
Keyword(s):  
Power Generation ◽  
Low Flow ◽  
Ocean Current ◽  
Speed Ratio ◽  
Motor Speed ◽  
Ocean Energy ◽  
Working Pressure ◽  
Speed Accuracy ◽  
Current Energy ◽  
Ocean Current Energy

Ocean energy is a kind of renewable energy contained in seawater, which has the characteristics of large total reserves, sustainable use, and its being green and clean. Influenced by rising oil prices and global climate change, an increasing number of countries are attaching great importance to the strategic position of ocean energy in the future energy sector, and are formulating national ocean energy development roadmaps and conducting research and development on ocean energy technologies. Ocean current energy is a widely existing kind of ocean energy with abundant reserves. However, due to the low current velocity in most of the deep sea, low current energy has not been effectively exploited. In this paper, the Blade element momentum (BEM) theory based on Vortex column theory is used to design a special airfoil for low current energy applications, and a prototype turbine with rotor diameter of 4.46 m and tip speed ratio (TSR)of 6 is fabricated. In order to achieve stable electric power output, this paper designs a hydraulic conversion power generation control system with flexible control, and the hydraulic system working pressure designed to 21 MPa. In this paper, we conducted towing experiments on the prototype of an ocean current energy turbine, with hydraulic transmission and a control power generation system applied to the low flow rate, and achieved the target of hydraulic motor speed in the range of 14.7~15.9 r/min and steady-state speed accuracy in the range of ±1%. The research conducted in this paper can provide a research basis for the efficient exploitation of low-flow ocean current energy.

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