Wave and tidal current energy – A review of the current state of research beyond technology

Uihlein, Andreas; Davide, Magagna

doi:10.1016/j.rser.2015.12.284

Cited by 382 publications

(178 citation statements)

References 80 publications

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“…Current research in generating ocean renewable energy by using hydrokinetic systems is focused on a) development of resource assessment methodologies, b) advanced turbine design with particular emphasis on efficient blade development, turbine wake and array modeling, and c) environmental and biodiversity impacts, [39]. A considerable discrepancy in investment price for hydrokinetic devices from 4500 $/kW to 14300 $/kW, [6] enables a wide range of practical solutions.…”

Section: Feasibility Of Investment Inmentioning

confidence: 99%

Feasibility of Investment in Renewable Energy Systems for Shipyards

Hadžić

Kozmar

Tomić

2018

brod

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SummaryShipbuilding industry is generally considered as one of the key global industries. It consumes a significant amount of energy and leaves a strong footprint on the environment. It is therefore required to try to increase renewable energy sources in the shipbuilding industry in accordance with the adopted international legislation. This will improve energy efficiency of shipyards and reduce their impact on the environment. The present preliminary study contributes to those goals as application of sustainable renewable energy systems in ship production industry is considered. The analysis is performed for solar panels, tidal and wind turbines with respect to their technology readiness and investment costs, as well as for the total energy consumption. While in the present work the research hypothesis is studied on example of a typical Croatian shipyard, the general findings are expected to be widely applicable to all shipyards. The solar panels are considered as the most suitable renewable technology, while the investment return period for introducing solar panels to satisfy the entire electrical energy demand in this particular case is approximately seven years. The impact of introducing this green shipbuilding approach is considered beneficial in comparison with current conventional electrical energy production based on conventional energy sources.

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Section: Feasibility Of Investment Inmentioning

confidence: 99%

Feasibility of Investment in Renewable Energy Systems for Shipyards

Hadžić

Kozmar

Tomić

2018

brod

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“…It is claimed that up to 85 gallons of ethanol for every ton of biomass and up to 150 gallons for every ton of hydrocarbon-rich material are converted (Henstra, Sipma, Rinzema, & Stams, 2007). Another less known area of current interest in the field of renewable energy, is wave energy harvested from ocean currents and waves (Uihlein & Magagna, 2016).…”

Section: Future Efforts In Biotechnologymentioning

confidence: 99%

Evaluation of some renewable energy technologies

Basu¹

2017

Min. miner. depos,

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Purpose. The study aims to outline and compare various renewable energy alternatives in view of the global warming crisis and depletion of fossil fuels which cause emissions of carbon dioxide. Carbon dioxide is a major source of pollution and is an absorbent for radiation. Methods.Literature surveys and analysis of benefits and drawbacks of the competing technologies should include the capital costs, running costs and carbon footprint. Liquid fuels have high energy to weight ratio compare to say solar panels or thermal absorbers, but what is neglected is the large refinery and other processing machinery behind the liquid fuel which is adding to the carbon footprint.Findings. Producer gas and bacterial engines are suggested as possible pollution reducing and cost effective methods for power generation. Coal, biomass, geothermal and hydroelectric have the lowest running cost, but carbon footprint cost is neglected. Solar chimneys, with low mechanical efficiency have low running costs, and no pollution. Modification of internal combustion engines to use producer gas and alcohol may reduce overall carbon footprint.Originality. Many researches focus on energy and mechanical efficiency. Bacterial engines have yet to be fully developed, and these are wonderful chemical factories but not understood in terms of classical thermodynamics. For all technologies, return on investment is more appropriate since capital costs are also included, which are neglected in mechanical efficiency calculations.Practical implications. Depletion of forest cover which acts as a greenhouse gas sink contributes to global warming. Worldwide, million of cars with internal combustion engines consuming petroleum, if converted to alternative fuels, can help in reducing the carbon gas emissions and ultimately to a slowdown in the global warming rate.

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“…From this perspective, an actual trend is represented by the joint research studies on wind and waves. Previous studies focused on evaluating the wave or the wind conditions of the ocean coastal environments of Atlantic, Pacific and Indian [15][16][17][18][19][20][21][22] in order to find the best areas for WEC or wind turbine implementation. By analyzing the resulted capacity factor of a Wave Dragon device, it can be observed that the most promising location for wave energy exploration are south of South America, Africa, Australia and Greenland.…”

Section: Introductionmentioning

confidence: 99%

A Joint Evaluation of the Wind and Wave Energy Resources Close to the Greek Islands

et al. 2017

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Abstract:The objective of this work is to analyze the wind and wave energy potential in the proximity of the Greek islands. Thus, by evaluating the synergy between wind and waves, a more comprehensive picture of the renewable energy resources in the target area is provided. In this study, two different data sources are considered. The first data set is provided by the European Centre for Medium-Range Weather Forecasts (ECMWF) through the ERA-Interim project and covers an 11-year period, while the second data set is Archiving, Validation and Interpretation of Satellite Oceanographic data (AVISO) and covers six years of information. Using these data, parameters such as wind speed, significant wave height (SWH) and mean wave period (MWP) are analyzed. The following marine areas are targeted: Ionian Sea, Aegean Sea, Sea of Crete, Libyan Sea and Levantine Sea, near the coastal environment of the Greek islands. Initially, 26 reference points were considered. For a more detailed analysis, the number of reference points was narrowed down to 10 that were considered more relevant. Since in the island environments the resources are in general rather limited, the proposed work provides some outcomes concerning the wind and wave energy potential and the synergy between these two natural resources in the vicinity of the Greek islands. From the analysis performed, it can be noticed that the most energetic wind conditions are encountered west of Cios Island, followed by the regions east of Tinos and northeast of Crete. In these locations, the annual average values of the wind power density (Pwind) are in the range of 286-298.6 W/m 2 . Regarding the wave power density (Pwave), the most energetic locations can be found in the vicinity of Crete, north, south and southeast of the island. There, the wave energy potential is in the range of 2.88-2.99 kW/m.

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Wave and tidal current energy – A review of the current state of research beyond technology

Cited by 382 publications

References 80 publications

Feasibility of Investment in Renewable Energy Systems for Shipyards

Feasibility of Investment in Renewable Energy Systems for Shipyards

Evaluation of some renewable energy technologies

A Joint Evaluation of the Wind and Wave Energy Resources Close to the Greek Islands

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