Testing Device for Hydrodynamic Characteristic on Conversion Devices of Tidal Stream Energy

2010 ◽  
Author(s):  
Li Long ◽  
Wang Ze ◽  
Zhou Kaining ◽  
Li Bo
Keyword(s):  
Energy Conversion ◽  
Hydrodynamic Model ◽  
Hydrodynamic Characteristic ◽  
Cost Effective ◽  
Electrical Energy ◽  
Testing Device ◽  
Essential Condition ◽  
Tidal Stream ◽  
Tidal Stream Energy ◽  
Conversion Technology

The feasibility of tidal in stream energy conversion technology, especially the demonstration of the efficiency in energy conversion, is of consequence to provide efficient devices and cost-effective electrical energy. The excellent hydrodynamic model of the conversion devices is an essential condition of a successful tidal flowing power. The experimentation of the hydrodynamic model in laboratory should be first selecting by reason of the reliability and immediate data to assess the hydrodynamic characteristic. But, the simulation of a flowing condition in laboratory is not easily accomplished, as a result of need of bigger flowing speed and greater bigger flume. Based on the relativity principle, the relative testing method of the energy conversion technology in tidal stream was provided. The peculiarity, the structure of the testing device was indicated. The function of every composing proportion on the testing device was explained. The process of experimentation was introduced.

scholarly journals Unsteady flow around a two-dimensional section of a vertical axis turbine for tidal stream energy conversion

2009 ◽  
Vol 1 (2) ◽  
Author(s):  
Hyun Ju Jung ◽  
Ju Hyun Lee ◽  
Shin Hyung Rliee ◽  
Museok Song ◽  
Beom-Soo Hyun
Keyword(s):  
Unsteady Flow ◽  
Energy Conversion ◽  
Stokes Equations ◽  
Vertical Axis ◽  
Navier Stokes ◽  
Two Dimensional ◽  
Navier Stokes Equations ◽  
Tidal Stream ◽  
Tidal Stream Energy ◽  
Vertical Axis Turbine

ABSTRACTThe two-dimensional unsteady flow around a vertical axis turbine for tidal stream energy' conversion was investigated using a computational fluid dynamics tool solving the Reynolds-Averaged Navier-Stokes equations. The geometry' of the turbine blade section was NACA653-01S airfoil. The computational analysis was done at several different angles of attack and the results were compared with the corresponding experimental data for validation and calibration. Simulations were then carried out for the two-dimensional cross section of a vertical axis turbine. The simulation results demonstrated the usefulness of the method for the typical unsteady flows around vertical axis turbines. The optimum turbine efficiency was achieved for carefully selected combinations of the number of blades and tip speed ratios.

Development of an Economic and Efficient Installation Vessel for Tidal Stream Energy Converter Arrays

2013 ◽  
Author(s):  
Rachel Nicholls-Lee ◽  
Simon Hindley ◽  
Richard Parkinson
Keyword(s):  
Oil And Gas ◽  
Cost Effective ◽  
Concept Design ◽  
Market Place ◽  
Operations And Maintenance ◽  
Tidal Turbine ◽  
Tidal Stream ◽  
Tidal Stream Energy ◽  
Time Required ◽  
The Cost

In order for tidal stream technology to develop into a viable and cost effective energy solution, the overall cost of tidal array installation, operations and maintenance must be driven down. The key issues which drive the cost are the time required to conduct operations and susceptibility to weather risk coupled with the expense of marine assets. Current vessels have limited operational windows due to weather and tidal constraints, which result in considerable cumulative costs due to high charges for such vessels. The marine renewable industry is currently reliant on vessels of opportunity from the offshore oil and gas sector; which, while sufficient for single device demonstration deployments, are not viable for array installations. De-coupling the tidal sector from this market place offers the opportunity to reduce the volatility of vessel day rates. This paper presents the concept design of an efficient and economic, fit for purpose installation vessel for tidal stream energy converters. The vessel has good dynamic positioning capabilities for operation in strong tidal currents thus broadening the operational window. The environmental impact of the vessel is reduced when compared to existing vessels. A key criterion throughout the design process is minimizing the cost of the vessel to tidal turbine site developers.

scholarly journals Pyroelectric Energy Conversion and Its Applications—Flexible Energy Harvesters and Sensors

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 2170 ◽  
Author(s):  
Atul Thakre ◽  
Ajeet Kumar ◽  
Hyun-Cheol Song ◽  
Dae-Yong Jeong ◽  
Jungho Ryu
Keyword(s):  
Energy Harvesting ◽  
Energy Conversion ◽  
Thermal Energy ◽  
Cost Effective ◽  
Electrical Energy ◽  
Energy Scavenging ◽  
Hybrid Energy ◽  
Energy Harvesters ◽  
Sensor Applications ◽  
Sensing Applications

Among the various forms of natural energies, heat is the most prevalent and least harvested energy. Scavenging and detecting stray thermal energy for conversion into electrical energy can provide a cost-effective and reliable energy source for modern electrical appliances and sensor applications. Along with this, flexible devices have attracted considerable attention in scientific and industrial communities as wearable and implantable harvesters in addition to traditional thermal sensor applications. This review mainly discusses thermal energy conversion through pyroelectric phenomena in various lead-free as well as lead-based ceramics and polymers for flexible pyroelectric energy harvesting and sensor applications. The corresponding thermodynamic heat cycles and figures of merit of the pyroelectric materials for energy harvesting and heat sensing applications are also briefly discussed. Moreover, this study provides guidance on designing pyroelectric materials for flexible pyroelectric and hybrid energy harvesting.

The Fluid Mechanics of Tidal Stream Energy Conversion

2021 ◽  
Vol 53 (1) ◽  
pp. 287-310
Author(s):  
Thomas A.A. Adcock ◽  
Scott Draper ◽  
Richard H.J. Willden ◽  
Christopher R. Vogel
Keyword(s):  
Fluid Mechanics ◽  
Energy Conversion ◽  
Fast Moving ◽  
Energy Generation ◽  
Tidal Stream ◽  
Tidal Stream Energy ◽  
Tidal Streams ◽  
Mechanical Devices

Placing mechanical devices into fast-moving tidal streams to generate clean and predictable electricity is a developing technology. This review covers the fundamental fluid mechanics of this application, which is important for understanding how such devices work and how they interact with the tidal stream resource. We focus on how tidal stream turbines and energy generation are modeled analytically, numerically, and experimentally. Owing to the nature of the problem, our review is split into different scales—from turbine to array and regional—and we examine each in turn.

Review of Energy Conversion Technology using Magnetohydrodynamics

2016 ◽  
Vol 136 (10) ◽  
pp. 769-772 ◽  
Author(s):  
Toru Sasaki ◽  
Nobuhiro Harada ◽  
Takashi Kikuchi ◽  
Kazumasa Takahashi
Keyword(s):  
Energy Conversion ◽  
Conversion Technology
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