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Float Inc Offshore Floating Ocean Energy System

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"Renewable energy sources are unlimited and free natural energies, without including the cost of capture and conversion." …

"Renewable energy sources are unlimited and free natural energies, without including the cost of capture and conversion."
Ancillary applications accommodated onboard can function all year long, thusly providing additional economic capital cost savings by the Float Inc Offshore Floating Ocean Energy System.

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  • I call your attention to a conference paper published 2013-9 by the Dublin Institute of Technology ARROW@DIT entitled:
    'The Domestic and Export Market for Large Scale Wave Energy in Ireland and the Economics of Export Transmission'
    See web link: http://arrow.dit.ie/engscheleart/207/

    The contents of this conference paper are highly applicable to the Float Inc Offshore Floating Ocean Energy System (OFOES) as well as ancillary applications, thus reducing the LCOE.

    Additionally, the ever-increasing demands of major player data centers in Ireland may also be accommodated & supplied electricity & air conditioning environment onboard the same OFOES.
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  • Offshore wind and wave power can be remarkably complimentary.
    Given an extended, stable floating platform to share, important economies from the capture of renewable energy sources for power production (conversion) and the use of the internal Potential Energy Storage (PES), energy storage is possible.
  • The Pneumatically Stabilized Platform (PSP) embodies such a platform.
    Developed with USA DARPA & ONR support, the Float Inc PSP marine technology was confirmed and performance characteristics validated in scale model testing.
    The Pneumatically Stabilized Platform achieves its at-sea motion stability and structural loads mitigation by decoupling the “hull” from ocean wave pressures through the use of air buoyancy, which is both compressible and mobile.
  • Refer to slide content for brief explanation of the PSP marine technology characteristics (confirmed and validated):
    The PSP modules will be constructed at the largest scale economically feasible and will be launched fully equipped with WECs and WTs installed, ready to run.
    These modules will be assembled at sea into the fully complete platform, from which the assembly will be towed to its assigned location were it is to be connected to pre-placed moorings and power cables – ready to function.
  • Most significant, from an economical & practical point-of-view, is that only concrete touches sea water in the platform, WEC or wind turbine systems.
    All equipment subject to maintenance, replacement or inspection is “in-the-dry” – fully accessible to personnel on foot, dry-shod.
    Operations and Maintenance personnel can comfortably live and work on the platform.
    Call attention to major points on slide:
    Extensible
    Mobile
    Long life
  • The air is contained in an array of interconnected, open-bottomed, cylindrical tanks. The air is made mobile by means of ducting. The ducting arrangement is selectable in real time, to best suit the sea-state environment and platform deck loading. Local air pressure adjustments are made via Roots-type blowers, as needed.
    The PSP is constructed, modularly, in pre-stressed, reinforced concrete, which, if properly formulated and applied, has been shown to be degradation-free in long term exposure to sea water.
    In contrast to steel hulls, a concrete PSP need never be dry-docked for inspection, and requires no significant maintenance of the basic hull. Its useful life is expected to exceed 70 years.
  • <number>
    Refer to slide content for brief explanation of:
    Incident wave (seaward side of PSP)
    PSP wave attenuation
    Transmitted wave (leeward side of PSP)
    Office of Naval Research (ONR) Model Tank Test Results concerning wave attenuation revealed:
    Wave Attenuation
    Wave PeriodWave Height(% and meters)
    7 seconds0m9094% & 0m05
    9 seconds2m5072% & 0m70
    12 seconds5m5050% & 2m75
    16 seconds10m0063% & 3m70
    20 seconds15m5054% & 7m13
  • In 2009, as a response to the submission of a white paper describing the Rho-Cee WEC system and its proposed development, the (then) US Mineral s Management Service awarded a period of wave basin testing at their large Ohmsett Facility.
    The purpose was to verify the wave capture efficiency of the impedance-matching characteristic of the Rho-Cee design.
    Tank test dimensions:
    Length =203meters
    Width = 20meters
    Depth = 3.5meters
    Contains 10million liters of crystal clear saltwater.
  • The loading impedance was selectably supplied by throttling of displaced air through calibrated, adjustable slide valves.
    A maximum of 93% of incident wave power was found dissipated by the linear portion of the air-flow resistance (by harmonic analysis).
    Recent efforts to optimize the design of the Rho-Cee make it clear that the achievable energy absorption effectiveness will be determined primarily by economics, rather than by physics (power production).
    The transverse linear dimension of the WEC structure is proportional to the greatest wave length (hence squared period) of capture.
    Therefore, the capital cost increases rapidly with the upper limit of period-band capture.
  • Because of a concentration of offshore wind energy, high sea states (waves) are generally considered an impediment, a hazard to efficient and safe ocean energy production.
    When in fact, waves are an energy asset, an asset so large as to frequently exceed that of the available wind energy itself.
    This is because the available wind power varies, as is well known, as the cube of the wind velocity – whereas, as is little known, the available wave energy varies as the fifth power of that self-same wind velocity that creates and sustains it.
  • Available power comparison, wind and wave.
    When compared on this engineering-consistent basis, as shown plotted in this slide, the available incident power of wave energy will be seen to equal that of wind energy at about 18 knots wind speed, and to exceed it, beyond.
    In addition, because waves travel global distances with little energy loss, it is frequently possible to harvest the energy of swells arriving from distant storms while residing in a region temporarily windless.
    We have termed this “other peoples wind”. The result is an increase in wave energy availability factor.
  • In order to simultaneously harvest both offshore wind and wave energy in an economically efficient and safe manner, it is evident that the equipment should be deployed from, and commonly supported by, a very large floating platform.
    The functions and systemic relationships supported by such a platform are described in the next slide.
  • Float Inc’s stable floating platform places the wind and wave energy harvesting systems offshore, adjustably moored, where the wind & wave energy resources are largest, and without restrictions of water depth. Both systems are supported, with little mutual interference, by the platform whose capital and maintenance costs are shared.
    The platform acts as an effective breakwater, enabling vessel access & berthing for personnel and materials transfer in any weather that permits navigation. The platform provides a dry land-like environment for operations & maintenance. Personnel may reside onboard and work in onboard shops.
    The platform provides an onboard potential energy storage system in the form of pressurized air contained in its large internal volume, and operated by the buoyancy air handling system with which the platform is inherently equipped.
    Finally, power outputs of both numerous wind turbines and wave energy converters may be collected via on-board, dry cabling to a central on-board conditioning unit from whence it may be sent ashore via a single submarine cable.
  • Finally, both wind and wave conversion systems are capable of storing substantial amounts of potential energy in their common supporting PSP structure.
    The excess renewable energy is converted into compressed air which is stored in closed volumes and buoyancy cylinders of the PSP.
    Once charged, the compressed air is readily available for reconversion by reversible motor-driven Roots blowers that are already part of the platform system.
    The excess renewable energy, in the form of compressed air, can be recuperated during intervals of low wave or wind activity to better match varying demands of the load infrastructure, thereby avoiding the principle objection to renewable energy sources.
  • Refer to slide content
  • In this figure, the uniformly spaced disc areas of regularly spaced wind turbines are converted to an equivalent uniform power capturing area per unit of lateral frontal length, so as to be directly comparable to the equivalent for the wave energy converters.
    In order to expand the wind turbine capacity proportion of a wind & wave offshore “farm,” the generic arrangement reflected on this slide has been applied.
    Here, the WEC and WT-bearing PSP is again intended to fill the leeward space of the farm, but an attached wind turbine-bearing structure is extended and protected to leeward.
    Note that each wind turbine located at the intersection of three struts is fitted with a “lily-pad” of decked PSP foundation structure that provides access for maintenance, as well as air-load moment balance, strength and buoyancy.
    A PSP section is fitted to one of the leeward legs to serve as a sheltered docking facility. A helicopter pad must also be fitted where air operations will not be threatened by the wind turbines; the swing-circles of the rotors are identified.
  • Case wave power study: Galicia, Spain
    Preliminary results (wave data history = 40+yrs)
    NB: 100-year storm information to be referenced for limit comparisons.
    Refer to slide contents for information.
  • Case wave power study: Belmullet, Ireland
    Preliminary results (wave data history = 7yrs)
    NB: 100-year storm information to be referenced for limit comparisons.
    Refer to slide contents for information.
  • “Renewable energy sources are unlimited and free natural energies, without including the cost of capture and conversion.”
    Ancillary applications accommodated onboard can function all year long, thusly providing additional economic capital cost savings by the Float Inc Offshore Floating Ocean Energy System.
    Thank you for your kind attention.
    Are there any questions?
  • Transcript

    • 1. StabilityStability SurvivabilitySurvivability Combined RESCombined RES Capture/ConversionCapture/Conversion CapacityCapacity Smaller Ocean footprintSmaller Ocean footprint Leeward Calm waterLeeward Calm water Berthing zoneBerthing zone MULTI-TASK APPSMULTI-TASK APPS Transport, EnergyTransport, Energy AquacultureAquaculture LeisureLeisure ADAPTABILITYADAPTABILITY Multi-task platformMulti-task platform Breakwater, MarinaBreakwater, Marina Commercial PortCommercial Port Modular, MonolithicModular, Monolithic ConstructionConstruction OffshoreOffshore Deep-oceanDeep-ocean Floating PlatformFloating Platform Float Inc’sFloat Inc’s Offshore FloatingOffshore Floating Ocean EnergyOcean Energy SystemSystem (OFOES)(OFOES)
    • 2. Float Inc. Pneumatically Stabilized Platform (PSP)Float Inc. Pneumatically Stabilized Platform (PSP) Primary Design as a Deep Ocean Offshore Floating PlatformPrimary Design as a Deep Ocean Offshore Floating Platform Float Inc. PSP Marine Technology Characteristics Confirmed & ValidatedFloat Inc. PSP Marine Technology Characteristics Confirmed & Validated  Defense Advanced ResearchDefense Advanced Research Project Agency (DARPA)Project Agency (DARPA) • Confirmation of PSPConfirmation of PSP marine technologymarine technology (1995 – 1996)(1995 – 1996)  Office of Naval ResearchOffice of Naval Research (ONR)(ONR) • Validation of PSP marineValidation of PSP marine technologytechnology characteristics (1997 –characteristics (1997 – 1998)1998)  Float Inc. PneumaticallyFloat Inc. Pneumatically Stabilized Platform (PSP)Stabilized Platform (PSP) marine technology chosen formarine technology chosen for inclusion in a national R&Dinclusion in a national R&D program U.S.A. –program U.S.A. – Department of DefenseDepartment of Defense ““Mobile Offshore BaseMobile Offshore Base Program”Program”
    • 3. Float Inc. PSP Marine TechnologyFloat Inc. PSP Marine Technology Characteristics Confirmed & ValidatedCharacteristics Confirmed & Validated  Stable with large Variable Deck Loads CapabilitiesStable with large Variable Deck Loads Capabilities • At-sea motion stability and structural loads mitigation byAt-sea motion stability and structural loads mitigation by decoupling the “hull” from ocean wave pressures through thedecoupling the “hull” from ocean wave pressures through the use of air buoyancy, which is both compressible and mobileuse of air buoyancy, which is both compressible and mobile within the PSP platform cylinders.within the PSP platform cylinders.  ModularModular • PSP cylinders assembled into modulesPSP cylinders assembled into modules • Modules assembled into PSP platform configurationModules assembled into PSP platform configuration  Modules assembly can be accomplished in Sea State 3Modules assembly can be accomplished in Sea State 3 levelslevels  Monolithic platformMonolithic platform • Modular construction and assemblyModular construction and assembly
    • 4. Float Inc. PSP Marine TechnologyFloat Inc. PSP Marine Technology Characteristics Confirmed & ValidatedCharacteristics Confirmed & Validated  ExtensibleExtensible • PSP modular construction permits extension of existing PSPPSP modular construction permits extension of existing PSP without interruption of existing activities onboardwithout interruption of existing activities onboard  MobileMobile • PSP can be repositioned to a different area/zone as the PSPPSP can be repositioned to a different area/zone as the PSP is simply retained in position by the appropriate anchorageis simply retained in position by the appropriate anchorage systemsystem  Long lifeLong life • PSP is constructed of post constraint, reinforced concretePSP is constructed of post constraint, reinforced concrete having a useful life exceeding 70-years.having a useful life exceeding 70-years. • No dry-docking required, and requires no significantNo dry-docking required, and requires no significant maintenance of the basic hull.maintenance of the basic hull.
    • 5. < A Module Adjustable Air Ducting > < Mobile Buoyancy Air Exchange
    • 6. Float Inc. Pneumatically Stabilized Platform (PSP)Float Inc. Pneumatically Stabilized Platform (PSP) Wave – Incident / Wave - Transmitted = Attenuation of Wave Energy ModelWave – Incident / Wave - Transmitted = Attenuation of Wave Energy Model L ai at h B L Under Platform field Incident Transmitted Energy Flows Office of Naval Research (ONR) Model Tank Test Results concerning wave attenuation revealed: Wave Attenuation Wave Period Wave Height (% and meters) 7 seconds 0m90 94% & 0m05 9 seconds 2m50 72% & 0m70 12 seconds5m50 50% & 2m75 16 seconds10m00 63% & 3m70 20 seconds 15m50 54% & 7m13
    • 7. Float Inc.Float Inc. Rho-Cee Wave Energy ConverterRho-Cee Wave Energy Converter Initial tank testing performedInitial tank testing performed at Ohmsett - BOEM tank testing facility in December 2009at Ohmsett - BOEM tank testing facility in December 2009
    • 8. Available power comparison, wind and wave.
    • 9. Some pics/ideas forSome pics/ideas for Oceans Offshore Energy SystemOceans Offshore Energy System Offshore Floating Ocean Energy SystemOffshore Floating Ocean Energy System proposed and presented byproposed and presented by
    • 10. Float Inc Offshore Floating Ocean Energy SystemFloat Inc Offshore Floating Ocean Energy System (OFOES) accommodates onboard the(OFOES) accommodates onboard the Pneumatically Stabilized Platform (PSP)Pneumatically Stabilized Platform (PSP)  Offshore Wind EnergyOffshore Wind Energy  Offshore Wave EnergyOffshore Wave Energy  Offshore Ocean Current EnergyOffshore Ocean Current Energy  Potential Energy Storage (PES)Potential Energy Storage (PES)  Ancillary Applications:Ancillary Applications: • Aquaculture & relatedAquaculture & related activitiesactivities • Desalination plantDesalination plant • LNG Liquefaction & Re-LNG Liquefaction & Re- gasification Facilitiesgasification Facilities • Offshore Ro-Ro and/orOffshore Ro-Ro and/or Container PortContainer Port • NB: Not an exhaustive listNB: Not an exhaustive list All on the same Platform - PSPAll on the same Platform - PSP
    • 11. 10' 10' 20' 20' 30' 0 0 20' 40' WL WL 10' 30' PSP Float Inc Pneumatically Stabilized Platform Deep-ocean floating Platform Stable + Extensible Long life Renewable Energy Capture & Storage Ancillary Applications Floating Real-Estate Applications Hydrokinetic turbine Renewable energy source Ocean Current Wind turbine Renewable energy source Wind Energy Rho-Cee Wave Energy Converter Renewable energy source Wave Energy PSP Potential Energy Storage Storage & Reconstitution of Renewable Energy Sources Electricity
    • 12. Offshore Wind Turbine FarmOffshore Wind Turbine Farm onboard the Float Inconboard the Float Inc Offshore Floating Ocean Energy System (OFOES)Offshore Floating Ocean Energy System (OFOES)  Structural stability that allows anyStructural stability that allows any standard Offshore Wind Turbinestandard Offshore Wind Turbine to be easily deployed.to be easily deployed. • Wind Turbine foundationsWind Turbine foundations same as onshoresame as onshore • Wind Turbines at end-of-life canWind Turbines at end-of-life can be replaced onboard the OFOESbe replaced onboard the OFOES  Access, maintenance andAccess, maintenance and operation similar to onshoreoperation similar to onshore  Transformer station in-the-dryTransformer station in-the-dry  One grid connection cable to shoreOne grid connection cable to shore  Storage of spare and repair partsStorage of spare and repair parts  No new specialized vessels neededNo new specialized vessels needed to transport equipment orto transport equipment or personnel directly from ports topersonnel directly from ports to platformplatform
    • 13. Waves, Winds ± 60° Calm zone Calm zone Wind & Wave Together - Extending the Wind Turbine farm Complimentary on the Float Inc Offshore Floating Ocean Energy System (OFOES) PSP span @ 1 200m Rho-Cee WEC width @ 1 040m Wind Turbines spacing @ 200m (extendable-leeward) with rotor diameter @ 90m Wind Turbine rating @ 3MW Rho-Cee WEC rating @ 60kW/m 200m dock - struts 200m x 5m concrete culvert pipe, w/rails Total Power Rating: 98MW PES Storage: ~12MW-Hr, cold Calm zone
    • 14. Case Study Example of an Offshore ZoneCase Study Example of an Offshore Zone Preliminary Calculations: Galicia, SpainPreliminary Calculations: Galicia, Spain source 40+ year Wave Data Historysource 40+ year Wave Data History Annual incidentAnnual incident wave powerwave power RecognizedRecognized 4040 kW/mkW/m Incident waveIncident wave power multiplied bypower multiplied by 8,760 hours/year8,760 hours/year 350,400350,400 kWh/m – yearkWh/m – year Rho-Cee WECRho-Cee WEC EconomicEconomic optimizationoptimization capture rate 60%capture rate 60% 210210 MWh/m – yearMWh/m – year Rho-Cee WECRho-Cee WEC Wave energyWave energy conversion rate 78%conversion rate 78% 164164 MWh/m – yearMWh/m – year Rho-Cee WECRho-Cee WEC Wave-front spanWave-front span 1,040meters1,040meters 170,547170,547 MWh/yearMWh/year Average annualAverage annual homehome Electricity useElectricity use 8MWh8MWh 21,31821,318 HomesHomes
    • 15. Annual incidentAnnual incident wave powerwave power RecognizedRecognized 7070 kW/mkW/m Incident waveIncident wave power multiplied bypower multiplied by 8,760 hours/year8,760 hours/year 613,200613,200 kWh/m – yearkWh/m – year Rho-Cee WECRho-Cee WEC EconomicEconomic optimizationoptimization capture rate 60%capture rate 60% 368368 MWh/m – yearMWh/m – year Rho-Cee WECRho-Cee WEC Wave energyWave energy conversion rate 78%conversion rate 78% 287287 MWh/m – yearMWh/m – year Rho-Cee WECRho-Cee WEC Wave-front spanWave-front span 1,040meters1,040meters 298,457298,457 MWh/yearMWh/year Average annualAverage annual homehome Electricity useElectricity use 8MWh8MWh 37,30737,307 HomesHomes Case Study Example of an Offshore Zone Preliminary Calculations: Belmullet, Ireland source SOWFIA DMP & NOAA Hindcast 7-year Wave Data History
    • 16. Thank you for your kind attention. You are cordially invited to visit our web site www.floatinc.org