Artificial structures such as wave and tidal energy devices provide surfaces and structures that ... more Artificial structures such as wave and tidal energy devices provide surfaces and structures that are naturally colonised by marine flora and fauna. Properties of the building material, surface texture and structural complexity of the infrastructure will determine the suitability as a habitat for marine organisms. While it may be desirable to inhibit fouling of some parts of the energy devices, the colonisation of other features may not compromise their overall functionality. Here we explore opportunities to not just tolerate the colonisation of marine infrastructure, but to design and manipulate features that would deliberately attract and host marine organisms. Serendipitous colonisation would be transformed into deliberately creating artificial reefs on the seafloor as well as floating reefs. This paper focuses on conceptual options for coastal, close-to-shore infrastructure, and it introduces two case studies: a proposed tidal lagoon that exploits tidal range energy and a wave en...
This paper reports on the real sea performance of the buoyancy control system of Wave Dragon, a f... more This paper reports on the real sea performance of the buoyancy control system of Wave Dragon, a floating wave energy converter using the overtopping principle. The device operates with the full independent control system which has been tested during three years of operation. The impact of the buoyancy control system performance on the power production is noted. This provides motivation and a target for improved control algorithms.
The objective of this study is to assess the environmental and economic performance of a combined... more The objective of this study is to assess the environmental and economic performance of a combined wind-wave energy converter over its entire lifecycle. The lifecycle analysis covers embedded costs, energy balance and carbon footprint, right from the raw materials to the final decommissioning. It is demonstrated that Wave Dragon in combination with wind has a 17% lower LCOE than a Wave Dragon without wind turbines. This is due to the fact tha t wind turbines are a very cost efficient technology when deployed in high wind speed sites if the costs of foundation and grid connection can be kept at a reasonable level – and this is obviously the case when installing on top of a heavy and stable platform like Wave Dragon.
... Hans Ch. SOERENSEN, Ph.D., Erik FRIIS-MADSEN, Ph.D., Lars CHRISTIANSEN, M.Sc. ... 2. L., H. H... more ... Hans Ch. SOERENSEN, Ph.D., Erik FRIIS-MADSEN, Ph.D., Lars CHRISTIANSEN, M.Sc. ... 2. L., H. Hansen, L. Halle, F. Blaabjerg, E. Ritchie, S. Munk-Nielsen, H. Bindner, P. Sorensen and B. Bak-Jansen, Conceptual survey of Generators and Power Electronics for Wind Turbines ...
This index covers all technical items-papers, correspondence, reviews, etc.-that appeared in this... more This index covers all technical items-papers, correspondence, reviews, etc.-that appeared in this periodical during the year, and items from previous years that were commented upon or corrected in this year. Departments and other items may also be covered if they have been judged to have archival value. The Author Index contains the primary entry for each item, listed under the first author?? s name. The primary entry includes the coauthors' names, the title of the paper or other item, and its location, ...
Artificial structures such as wave and tidal energy devices provide surfaces and structures that ... more Artificial structures such as wave and tidal energy devices provide surfaces and structures that are naturally colonised by marine flora and fauna. Properties of the building material, surface texture and structural complexity of the infrastructure will determine the suitability as a habitat for marine organisms. While it may be desirable to inhibit fouling of some parts of the energy devices, the colonisation of other features may not compromise their overall functionality. Here we explore opportunities to not just tolerate the colonisation of marine infrastructure, but to design and manipulate features that would deliberately attract and host marine organisms. Serendipitous colonisation would be transformed into deliberately creating artificial reefs on the seafloor as well as floating reefs. This paper focuses on conceptual options for coastal, close-to-shore infrastructure, and it introduces two case studies: a proposed tidal lagoon that exploits tidal range energy and a wave en...
This paper reports on the real sea performance of the buoyancy control system of Wave Dragon, a f... more This paper reports on the real sea performance of the buoyancy control system of Wave Dragon, a floating wave energy converter using the overtopping principle. The device operates with the full independent control system which has been tested during three years of operation. The impact of the buoyancy control system performance on the power production is noted. This provides motivation and a target for improved control algorithms.
The objective of this study is to assess the environmental and economic performance of a combined... more The objective of this study is to assess the environmental and economic performance of a combined wind-wave energy converter over its entire lifecycle. The lifecycle analysis covers embedded costs, energy balance and carbon footprint, right from the raw materials to the final decommissioning. It is demonstrated that Wave Dragon in combination with wind has a 17% lower LCOE than a Wave Dragon without wind turbines. This is due to the fact tha t wind turbines are a very cost efficient technology when deployed in high wind speed sites if the costs of foundation and grid connection can be kept at a reasonable level – and this is obviously the case when installing on top of a heavy and stable platform like Wave Dragon.
... Hans Ch. SOERENSEN, Ph.D., Erik FRIIS-MADSEN, Ph.D., Lars CHRISTIANSEN, M.Sc. ... 2. L., H. H... more ... Hans Ch. SOERENSEN, Ph.D., Erik FRIIS-MADSEN, Ph.D., Lars CHRISTIANSEN, M.Sc. ... 2. L., H. Hansen, L. Halle, F. Blaabjerg, E. Ritchie, S. Munk-Nielsen, H. Bindner, P. Sorensen and B. Bak-Jansen, Conceptual survey of Generators and Power Electronics for Wind Turbines ...
This index covers all technical items-papers, correspondence, reviews, etc.-that appeared in this... more This index covers all technical items-papers, correspondence, reviews, etc.-that appeared in this periodical during the year, and items from previous years that were commented upon or corrected in this year. Departments and other items may also be covered if they have been judged to have archival value. The Author Index contains the primary entry for each item, listed under the first author?? s name. The primary entry includes the coauthors' names, the title of the paper or other item, and its location, ...
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