On Assessing the Reliability and Availability of Marine Energy Converters: The Problems of a New Technology

2006 ◽  
Vol 220 (1) ◽  
pp. 55-68 ◽  
Author(s):  
J Wolfram
Keyword(s):  
New Technology ◽  
Marine Energy ◽  
Reliability And Availability ◽  
Energy Converters

Certification of Marine Energy Converters: The Experience So Far

2007 ◽  
Author(s):  
Claudio Bittencourt Ferreira
Keyword(s):  
New Technology ◽  
Third Party ◽  
Functional Requirements ◽  
Energy Converter ◽  
The Past ◽  
Wave Energy Converters ◽  
Marine Energy ◽  
Constraints Handling ◽  
The Right ◽  
Energy Converters

In the past few years, DNV has been involved in a variety of projects related to marine energy converters. All projects have been characterised for the handling of technical uncertainties due to the application of new technology or proven technology in different area of application. A systematic approach based on the DNV RP-A203 Qualification of New Technology [1] was applied combined with the Guidelines for Design and Operation of Wave Energy Converters [2] to steer the third party activity, but, more importantly, to allow developers to systematically identify and deal with the risks in a rational manner with traceability of decisions throughout the development of the energy converter. From the very start of our engagement, it was clear that the handling of technical uncertainties was affected, not only by the technical barriers, but also by financial and time constraints. The establishment of the safety and functional targets to be achieved by the energy converter are to be based, not only on the safety and asset integrity aspects, but also on the financial / business model. The experience of using the Qualification process and the Guidelines on these projects, achieving the right balance between the constraints, handling of uncertainties, financial targets and safety and functional requirements, are briefly described in this paper as well as the future steps to be taken to improve the process and consolidate the experience so far. In this paper, it is also addressed the use of the DNV OSS-312 [3] on the certification process of marine energy converters.

Certification of Marine Energy Converters: The Experience so Far

2008 ◽  
Vol 130 (4) ◽  
Author(s):  
Claudio Bittencourt Ferreira
Keyword(s):  
New Technology ◽  
Tidal Energy ◽  
Third Party ◽  
Functional Requirements ◽  
Energy Converter ◽  
Wave Energy Converters ◽  
Marine Energy ◽  
Energy Challenge ◽  
The Right ◽  
Energy Converters

In the past few years, DNV has been involved in a variety of projects related to marine energy converters. All projects have been characterized for the handling of technical uncertainties due to the application of new technology or proven technology in different areas of application. A systematic approach based on the DNV RP-A203 Qualification of New Technology was applied combined with the Guidelines for Design and Operation of Wave Energy Converters (May 2005—work carried out by DNV under Commission of Carbon Trust as part of Marine Energy Challenge) to steer the third party activity, but, more importantly, to allow developers to systematically identify and deal with the risks in a rational manner with traceability of decisions throughout the development of the energy converter. From the very start of our engagement, it was clear that the handling of technical uncertainties was affected, not only by the technical barriers, but also by financial and time constraints. The establishment of the safety and functional targets to be achieved by the energy converter are to be based, not only on the safety and asset integrity aspects, but also on the financial∕business model. The experience of using the qualification process and the guidelines on these projects, achieving the right balance between the constraints, handling of uncertainties, financial targets, and safety and functional requirements, are briefly described in this paper as well as the future steps to be taken to improve the process and consolidate the experience so far. In this paper, the use of the DNV OSS-312 (Certification of Wave and Tidal Energy Converters) on the certification process of marine energy converters is also addressed.

Peakedness of Wave Systems Observed on the French Wave Energy Test Site (SEM-REV) Using a Spectral Partitioning Algorithm

2013 ◽  
Author(s):  
Jean-Baptiste Saulnier ◽  
Izan Le Crom
Keyword(s):  
Wave Energy ◽  
Test Site ◽  
Extreme Conditions ◽  
Multiple Wave ◽  
Wave Energy Converters ◽  
Marine Energy ◽  
Partitioning Algorithm ◽  
Spectral Partitioning ◽  
The Individual ◽  
Energy Converters

Located off the Guérande peninsula, SEM-REV is the French maritime facility dedicated to the testing of wave energy converters and related components. Lead by Ecole Centrale de Nantes through the LHEEA laboratory, its aim is to promote research alongside the development of new offshore technologies. To this end, the 1km2, grid-connected zone is equipped with a comprehensive instruments network sensing met-ocean processes and especially waves, with two identical directional Waverider buoys deployed on the site since 2009. For the design of moored floating structures and, a fortiori, floating marine energy converters, the knowledge of the main wave resource — for regular operation — but also extreme conditions — for moorings and device survivability — has to be as precise as possible. Also, the consideration of the multiple wave systems (swell, wind sea) making up the sea state is a key asset for the support of developers before and during the testing phase. To this end, a spectral partitioning algorithm has been implemented which enables the individual characterisation of wave systems, in particular that of their spectral peakedness which is especially addressed in this work. Peakedness has been shown to be strongly related to the groupiness of large waves and is defined here as the standard JONSWAP’s peak enhancement factor γ. Statistics related to this quantity are derived from the measurement network, with a particular focus on the extreme conditions reported on SEM-REV (Joachim storm).

scholarly journals Mighty Mites

2005 ◽  
Vol 127 (09) ◽  
pp. 34-37
Author(s):  
Don W. Dareing ◽  
Thomas Thundat
Keyword(s):  
Health Care ◽  
Industrial Revolution ◽  
New Technologies ◽  
New Technology ◽  
Production Costs ◽  
New Materials ◽  
Performance Predictions ◽  
The 19Th Century ◽  
Analytical Tools ◽  
Reliability And Availability

This article reviews that the future belongs to machines built at molecular scales—if the tools to engineer them. Just as the steam engine sparked the industrial revolution of the 19th century, nanotechnology will likely ignite a new industrial revolution during the 21st century. Nanotechnology has the potential to impact all industries; the health care and computer industries are already capitalizing on it. New materials are being created that will affect everything from aerospace and energy to recreation and entertainment. Science is uncovering new technology almost daily, which will have a great impact on many aspects of society. These technologies are at various stages of development, but in the end, each spin-off product must withstand the test in the marketplace. The evaluation of each product will still be based on the same set of metrics as other products: performance, cost, risk or reliability, and availability. To satisfy these metrics, engineers will need analytical tools to make performance predictions, establish production costs and lifecycle economics, quantify the risk associated with new technologies, and satisfy a dynamic market.

Mooring systems for marine energy converters

2016 ◽  
Author(s):  
John F. Flory ◽  
Stephen J. Banfield ◽  
Isabel M.L. Ridge ◽  
Ben Yeats ◽  
Tom Mackay ◽  
...  
Keyword(s):  
Marine Energy ◽  
Energy Converters

scholarly journals Operating Experience Complements New Technology in Design of Advanced Combustion Turbine

1988 ◽  
Author(s):  
A. J. Scalzo ◽  
R. J. Antos ◽  
I. Fukue
Keyword(s):  
High Reliability ◽  
New Technology ◽  
Operating Experience ◽  
Heavy Duty ◽  
Advanced Combustion ◽  
Technological Advances ◽  
Current Production ◽  
Reliability And Availability

High reliability and availability of current production combustion turbines have been achieved only after the identification and the resolution of past operating anomilies. Technological advances in fields such as aerodynamics, metallurgy, cooling, and computer capability have played important roles in these solutions as well as in the development of new advanced heavy duty combustion turbines. This paper discusses experiences with the W501 and the MW 701D combustion turbines and how this background influenced the design of the 501F advanced heavy duty combustion turbine.

Addressing failure rate uncertainties of marine energy converters

2012 ◽  
Vol 44 ◽  
pp. 359-367 ◽  
Author(s):  
Philipp R. Thies ◽  
George H. Smith ◽  
Lars Johanning
Keyword(s):  
Failure Rate ◽  
Marine Energy ◽  
Energy Converters
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