A Low Specific Mass, Free Floating Wind Energy Concept up to 40 MW

2019 ◽  
Author(s):  
William Alexander
Keyword(s):  
Wind Energy ◽  
High Stability ◽  
Open Ocean ◽  
Liquid Fuels ◽  
Power Capacity ◽  
Specific Mass ◽  
Energy Concept ◽  
Wave Heights ◽  
Ocean Wind ◽  
Structural Mass

Abstract Presented here is a low specific mass, free-floating, open ocean, wind energy concept with nominal power capacity to 40 MW, on-board liquid fuels generation, and with operational and survival wave heights to 12 and 40 meters respectively. The estimated specific structural mass of 42 kG/kWp is about 1/3 of the specific mass of much smaller land-based turbines, and less than 6% of the specific structural mass of existing off-shore floating wind turbines. The turbine platform may be operated un-tethered in the open ocean using about 8% of the generated power, on average, for active station keeping. The generated energy may be stored on board via hydrogen electrolysis and liquification for periodic tanker unloading. Reduction of moment loads in the blades and nacelle support structure as well as the unique deep-water foundation result in the low specific mass and high stability.

scholarly journals Combining QuickSCAT wind data and Landsat ETM+ images to evaluate the offshore wind power resource of East Vietnam Sea

2020 ◽  
Vol 20 (2) ◽  
pp. 143-153
Author(s):  
Nguyen Xuan Tung ◽  
Do Huy Cuong ◽  
Bui Thi Bao Anh ◽  
Nguyen Thi Nhan ◽  
Tran Quang Son
Keyword(s):  
Power Generation ◽  
Wind Energy ◽  
Wind Power ◽  
Power Density ◽  
Geographical Location ◽  
Wind Power Generation ◽  
Offshore Wind ◽  
Wind Data ◽  
Power Capacity ◽  
Wind Power Density

Since the East Vietnam Sea has an advantageous geographical location and rich natural resources, we can develop and manage islands and reefs in this region reasonably to declare national sovereignty. Based on 1096 scenes of QuikSCAT wind data of 2006–2009, wind power density at 10 m hight is calculated to evaluate wind energy resources of the East Vietnam Sea. With a combination of wind power density at 70 m hight calculated according to the power law of wind energy profile and reef flats extracted from 35 scenes of Landsat ETM+ images, installed wind power capacity of every island or reef is estimated to evaluate wind power generation of the East Vietnam Sea. We found that the wind power density ranges from levels 4–7, so that the wind energy can be well applied to wind power generation. The wind power density takes on a gradually increasing trend in seasons. Specifically, the wind power density is lower in spring and summer, whereas it is higher in autumn and winter. Among islands and reefs in the East Vietnam Sea, the installed wind power capacity of Hoang Sa archipelago is highest in general, the installed wind power capacity of Truong Sa archipelago is at the third level. The installed wind power capacity of Discovery Reef, Bombay Reef, Tree island, Lincoln island, Woody Island of Hoang Sa archipelago and Mariveles Reef, Ladd Reef, Petley Reef, Cornwallis South Reef of Truong Sa archipelago is relatively high, and wind power generation should be developed on these islands first.

scholarly journals Small-scale open ocean currents have large effects on wind wave heights

2017 ◽  
Vol 122 (6) ◽  
pp. 4500-4517 ◽  
Author(s):  
Fabrice Ardhuin ◽  
Sarah T. Gille ◽  
Dimitris Menemenlis ◽  
Cesar B. Rocha ◽  
Nicolas Rascle ◽  
...  
Keyword(s):  
Wind Wave ◽  
Open Ocean ◽  
Ocean Currents ◽  
Small Scale ◽  
Wave Heights

scholarly journals Analysis of Ocean Wind Energy Density around Sulawesi and Maluku Islands with Scatterometer Data

2015 ◽  
Vol 65 ◽  
pp. 107-115 ◽  
Author(s):  
Faisal Mahmuddin ◽  
Misliah Idrus ◽  
Hamzah
Keyword(s):  
Energy Density ◽  
Wind Energy ◽  
Ocean Wind

Sustainable Transportation Fuels From Off-Peak Wind Energy, CO2, and Water

2010 ◽  
Author(s):  
Laura L. Holte ◽  
Glenn N. Doty ◽  
David L. McCree ◽  
Judy M. Doty ◽  
F. David Doty
Keyword(s):  
Wind Energy ◽  
Co2 Emissions ◽  
High Efficiency ◽  
Clean Energy ◽  
Sustainable Transportation ◽  
Liquid Fuels ◽  
Process Conditions ◽  
Low Carbon ◽  
Transportation Fuels ◽  
Carbon Neutral

Doty Energy is developing advanced processes to permit the production of fully carbon-neutral gasoline, jet fuel, diesel, ethanol, and plastics from exhaust CO2 and off-peak clean energy (wind and nuclear) at prices that can compete with fossil-derived products. Converting CO2 into fuels will eliminate the need for CO2 sequestration, reduce global CO2 emissions by 40%, and provide a nearly insatiable market for off-peak wind. It has long been known that it is theoretically possible to convert CO2 and water into standard liquid hydrocarbon fuels at high efficiency. However, the early proposals for doing this conversion had efficiencies of only 25% to 35%. That is, the chemical energy in the liquid fuels produced (gasoline, ethanol, etc.) would be about the 30% of the input energy required. The combination of the eight major technical advances made over the past two years should permit this conversion to be done at up to 60% efficiency. Off-peak grid energy averaged only $16.4/MWhr in the Minnesota hub throughout all of 2009 (the cheapest 6 hours/day averaged only $7.1/MWh). At such prices, the synthesized standard liquid fuels (dubbed “WindFuels”) should compete even when petroleum is only $45/bbl. A more scalable alternative for transportation fuels is needed than biofuels. It is in our economic and security interests to produce transportation fuels domestically at the scale of hundreds of billions of gallons per year. WindFuels can scale to this level, and as they are fully carbon-neutral they will dramatically reduce global CO2 emissions at the same time. Switching 70% of global transportation fuels from petroleum to WindFuels should be possible over the next 30 years. WindFuels will insure extremely strong growth in wind energy for many decades by generating an enormous market for off-peak wind energy. WindFuels is based largely on the commercially proven technologies of wind energy, water electrolysis, and Fischer Tropsch (FT) chemistry. Off-peak low carbon energy is used to split water into hydrogen and oxygen. Some of the hydrogen is used to reduce CO2 into carbon monoxide (CO) and water via the Reverse Water Gas Shift (RWGS) reaction. The CO and the balance of the hydrogen are fed into an FT reactor similar to those used to produce fuels and chemicals from coal or natural gas. The processes have been simulated, and key experiments are being carried out to help optimize process conditions and validate the simulations.

scholarly journals Lignin-containing Feedstock Hydrogenolysis for Biofuel Component Production

2018 ◽  
Vol 13 (1) ◽  
pp. 74 ◽  
Author(s):  
Elena Shimanskaya ◽  
Аntonina A. Stepacheva ◽  
Esther Sulman ◽  
Evgeny Rebrov ◽  
Valentina Matveeva
Keyword(s):  
Chemical Reaction ◽  
High Stability ◽  
Model Compound ◽  
Complex Structure ◽  
Hypercrosslinked Polystyrene ◽  
Reaction Engineering ◽  
Liquid Fuels ◽  
Lignocellulosic Material ◽  
Commercial Carbon ◽  
Component Production

In this paper, the commercial 5%Pd/C and 5%Pt/C catalysts and synthesized 5%Pt/MN-270 and 5%Pd/MN-270 were used in the hydrogenolysis of lignocellulosic material (softwood sawdust) to obtain liquid fuels in the form of hydrocarbons. As lignin has a very complex structure, anisole was used as a model compound. It was found that the use Pt-containing catalysts based on hypercrosslinked polystyrene in both processes of anisole and lignin-containing feedstock conversion allowed obtaining the highest yield of oxygen-free hydrocarbons (up to 96 wt. %). Besides, the polymer based catalysts showed high stability in hydrogenolysis process in comparison with the commercial carbon based catalysts. Copyright © 2018 BCREC Group. All rights reservedReceived: 3rd March 2017; Revised: 18th August 2017; Accepted: 21st August 2017; Available online: 22nd January 2018; Published regularly: 2nd April 2018How to Cite: Shimanskaya, E.I., Stepacheva, A.A., Sulman, E.M., Rebrov, E.V., Matveeva, V.G. (2018). Lignin-containing Feedstock Hydrogenolysis for Biofuel Component Production. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (1): 74-81 (doi:10.9767/bcrec.13.1.969.74-81) 

scholarly journals Ocean Wind Energy Technologies in Modern Electric Networks: Opportunity and Challenges

2020 ◽  
Author(s):  
Foad H. Gandoman ◽  
Abdollah Ahmadi ◽  
Shady H.E. Abdel Aleem ◽  
Masoud Ardeshiri ◽  
Ali Esmaeel Nezhad ◽  
...  
Keyword(s):  
Wind Energy ◽  
Electric Networks ◽  
Energy Technologies ◽  
Ocean Wind
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