Tidal stream energy as a potential continuous power producer: A case study for West Japan

2021 ◽  
Vol 245 ◽  
pp. 114533
Author(s):  
Patxi Garcia Novo ◽  
Yusaku Kyozuka
Keyword(s):  
Tidal Stream ◽  
Tidal Stream Energy ◽  
Continuous Power

scholarly journals A HOLISTIC METHOD TO SELECT TIDAL STREAM ENERGY HOTSPOTS

2017 ◽  
pp. 5
Author(s):  
Angela Vazquez ◽  
Gregorio Iglesias
Keyword(s):  
Ad Hoc ◽  
Holistic Approach ◽  
Tidal Energy ◽  
Energy Development ◽  
Potential Conflict ◽  
Cost Of Energy ◽  
Tidal Turbine ◽  
Tidal Stream ◽  
Tidal Stream Energy

Potential areas for tidal stream energy development are conventionally selected on the basis of resource assessments. For all the importance of the resource, there are other elements (technological, economic, spatial, etc.) that must be taken into account in this selection. The objective of the present work is to develop a new methodology to select tidal stream hotspots accounting for all these relevant elements, and to apply it to a case study, showing in the process how the potential for tidal energy development can be fundamentally altered by technological, economic and spatial constraints. The case study is conducted in the Bristol Channel and Severn Estuary (UK), one of the regions with the largest tidal resource in the world. First, the most energetic areas are identified by means of a hydrodynamics model, calibrated and validated with field data. Second, the method calculates the energy that can be harnessed in these areas by means of a geospatial Matlab-based program designed ad hoc, and on the basis of the power curve and dimensions of a specific tidal turbine. Third, the spatial distribution of the levelised cost of energy (LCOE) is calculated, and a number of locations are selected as potential tidal sites. The fourth element in the approach is the consideration of restrictions due to overlap with other marine uses, such as shipping. As a result, potential conflict-free areas for tidal stream energy exploitation at an economical cost are identified. Thus, the case study illustrates this holistic approach to selecting tidal stream sites and the importance of elements other than the resource, which – for all its relevance – is shown to not guarantee by itself the potential for tidal stream energy development.

scholarly journals Financial and Economic Assessment of Tidal Stream Energy—A Case Study

2020 ◽  
Vol 8 (3) ◽  
pp. 48
Author(s):  
Stocker Klaus
Keyword(s):  
Solar Energy ◽  
Life Experience ◽  
Real Life ◽  
Economic Assessment ◽  
The Philippines ◽  
Power Stations ◽  
Tidal Stream ◽  
Tidal Stream Energy ◽  
Private Investors

This case study is based on actual project and consultancy work, balancing real life experience with a review and analysis of empirical and theoretical literature. Tidal stream energy (TSE) is still a nascent technology, but with much better predictability than the classical alternatives of sun and wind. Being still more expensive than other renewable technologies, it is important to find locations in order to initiate a learning process to bring down cost to a competitive level as it was the case for solar and wind technologies. Locations for an initial phase of operation of TSE small islands in the Philippines (and other Asian countries) were found to be most suitable, because expensive and polluting diesel generators can be replaced and a reliable 24 h electricity supply can be established. Different appraisal methods in different scenarios show that under normal circumstances a hybrid combination of TSE, solar energy and battery storage is financially and economically superior to existing fossil energy based power stations as well as to solar energy alone. However, the traditional financial approaches are not always reliable, in spite of superficial mathematical exactness, and the parameters used must be analysed carefully, especially if we deal with innovative technologies with fast changes. In times of global warming we must also include the controversial issue of evaluating damages from greenhouse gases if choosing fossil alternatives. When evaluating and planning renewable technologies, engineering know-how is important, but insufficient. Since financing is a crucial issue for most renewable technologies with high front loaded cost and long amortisation periods, a thorough and trustworthy financial and economic analysis is necessary not only to avoid financial failure later on, but also to attract stakeholders like private investors, banks and government institutions to support a still unknown technology.

Development of a 300 kW horizontal-axis tidal stream energy conversion system with adaptive variable-pitch turbine and direct-drive PMSG

Energy ◽  
2021 ◽  
Vol 226 ◽  
pp. 120361
Author(s):  
Yongjun Dong ◽  
Jingfu Guo ◽  
Jianmei Chen ◽  
Chao Sun ◽  
Wanqiang Zhu ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Horizontal Axis ◽  
Direct Drive ◽  
Variable Pitch ◽  
Conversion System ◽  
Tidal Stream ◽  
Tidal Stream Energy ◽  
Energy Conversion System

scholarly journals Comparative Effects of Climate Change and Tidal Stream Energy Extraction in a Shelf Sea

2018 ◽  
Vol 123 (7) ◽  
pp. 5041-5067 ◽  
Author(s):  
Michela De Dominicis ◽  
Judith Wolf ◽  
Rory O'Hara Murray
Keyword(s):  
Climate Change ◽  
Energy Extraction ◽  
Shelf Sea ◽  
Tidal Stream ◽  
Tidal Stream Energy

Device interactions in reducing the cost of tidal stream energy

2015 ◽  
Vol 97 ◽  
pp. 428-438 ◽  
Author(s):  
A. Vazquez ◽  
G. Iglesias
Keyword(s):  
Tidal Stream ◽  
Tidal Stream Energy ◽  
The Cost
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