LM OTEC Mini Spar Design_December 2011 - Hawaii National ...

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Document HistoryRevision Date Summary of ChangesInitial Release 09 December 2011 Initial Release (Covers CDRLS A014 and A021) Volume 4 of 4Configuration Report and Development Plan Volume 4Site Specific OTEC Pilot Planti
ContentsExecutive Summary ....................................................................................................................................... 11 Introduction .......................................................................................................................................... 41.1 Options and Configurations .......................................................................................................... 61.2 Top‐Level Requirements ............................................................................................................. 101.3 Selected Design Drivers ............................................................................................................... 101.4 Document Structure.................................................................................................................... 101.5 Reference Documents ................................................................................................................. 122 Configuration Report, CDRL A014; 2.5 MW OTEC Pilot Plant ............................................................. 132.1 Overall Description of 2.5‐MW OTEC Mini‐Spar Pilot Plant ....................................................... 132.2 OTEC System Architecture .......................................................................................................... 232.3 Global Responses ........................................................................................................................ 252.3.1 Analytical Model ................................................................................................................. 252.3.2 Model Assumptions ............................................................................................................ 272.3.3 Results Summary ................................................................................................................. 272.3.4 Operational Responses ....................................................................................................... 292.3.5 Selected Graphs of Results.................................................................................................. 312.3.6 Summary and Discussion .................................................................................................... 312.4 Platform and Mooring Segment ................................................................................................. 352.4.1 Design Basis ......................................................................................................................... 352.4.2 Hull ...................................................................................................................................... 352.4.3 Topsides .............................................................................................................................. 392.4.4 Auxiliary Systems ................................................................................................................ 522.4.5 OTEC Plant Integration ........................................................................................................ 572.4.6 Environmental Requirement Integration ............................................................................ 63Configuration Report and Development Plan Volume 4Site Specific OTEC Pilot Plantii
Page 1: NAVFAC Ocean Thermal EnergyConversi
Page 5: 3.2.2 Risks........................
Page 8 and 9: Figure 2‐53 CWP Connection Closin
Page 10 and 11: Figure 2‐110 CWP Hook‐up Step 1
Page 12 and 13: Table 2‐27 Power Delivery Trade S
Page 14 and 15: The 2.5‐MW Mini‐Spar’s functi
Page 16: 1 IntroductionThe Naval Facilities
Page 19 and 20: Range Facility (PMRF) on Kauai wher
Page 21 and 22: CriteriaBaseline Floating Option La
Page 23 and 24: This volume addresses the 2.5‐MW
Page 25 and 26: 2 Configuration Report, CDRL A014;
Page 27 and 28: platform has an estimated cost of a
Page 29 and 30: spar’s mild seakeeping motions, t
Page 31 and 32: vapor continues downward to one of
Page 33 and 34: MotorMagCouplingPumpFigure 2‐8 Le
Page 35 and 36: inform OTEC design and regulatory g
Page 39 and 40: Figure 2‐12 Cell Spar Coupled Ana
Page 41 and 42: Table 2‐4 Extreme Anchor Loads In
Page 43 and 44: 2.3.4.2 CWP Fatigue Loads and Strai
Page 45 and 46: 97% value is plotted, showing that
Page 47 and 48: 2.4 Platform and Mooring Segment2.4
Page 49 and 50: 2.4.2.1.1 Cell ArrangementThe OTEC
Page 51 and 52: Hydrodynamic analysis to date has f
Page 53 and 54:
Figure 2‐19 AccommodationsSource:
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d. (2) Able Seamen and (1) Ordinary
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Figure 2‐22 Platform Main Deck2.4
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The machinery that is located in th
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The air intake for the machinery sp
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2.4.4.7 Fresh Water SystemsFreshwat
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2.4.4.12 IncineratorAn incinerator
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Figure 2‐25 OTEC Water FlowConfig
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Figure 2‐26 Water Flow Through th
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configurations may be possible. Fur
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Z‐AXIS (+ UP)Z‐AXIS(+ UP)X‐AX
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2.4.7.3 Upright In‐Service Condit
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The hull girder section modulus for
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2.4.10.1.2 Post‐Demonstration Per
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2.4.10.3 Anchor SubsystemThe variou
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The U.S. Navy provides recommendati
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2.4.11 Cold Water Pipe Element2.4.1
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dynamic head with a period in the 1
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Figure 2‐45 First and Second Coll
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2.4.11.2.4 CWP DynamicsThe CWP is s
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cycle, building added conservatism
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Figure 2‐52 CWP Connection to Spa
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often have voids. Although voids ca
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throughout fatigue loading. Fatigue
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De-mister: -45 m Turbine (Datum): 0
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2.5.2 Power Generation Segment Over
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Red = Thermal PowerGreen = Mechanic
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The red‐shaded entries in the tab
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components are shown in Figure 2‐
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Figure 2‐67 Detail of Water Flow
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The temperature and pressure sensor
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2.5.2.6 Condenser Heat ExchangerThe
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condensation process is gravity con
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The Hx is constructed of alternatin
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2.5.2.8 Working Fluid Subsystem2.5.
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Figure 2‐78 OTEC Process Piping D
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Figure 2‐79 Left: Magnetic Drive
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should have external insulation cap
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2.5.3 Electrical Generation Element
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Axial‐impulse turbines, such as i
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The issue of operating in a marine
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Figure 2‐86 Functional Block Diag
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The requirements for the Power Deli
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2.6.2 Onboard Distribution ElementT
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safety risks are mitigated. Further
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2.6.2.7 Power Transmission ElementF
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The dynamic stress on the cable is
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Figure 2‐94 Submarine Cable Descr
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Table 2‐34 Mini‐Spar Motions, 1
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2.6.2.11 Shore Grid Connection Elem
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2.7.2 Computer Integrated Process A
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communications protocols used for I
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2.7.3.5 Safety, Security, Communica
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VSAT Maritime Satellite Communicati
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Instrumentation (TSI) system. Beari
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2.7.4.4 Electrical Power Delivery I
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Installation PhaseDetails3. Mooring
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2.8.2.1 Ballast PlanThe ballast pla
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#2 Anchor Hook‐upThe spar is towe
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Figure 2‐107 Location of CWP Asse
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CWP Upending:The CWP is towed to th
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2.8.2.5 Offshore Equipment Installa
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The following ground rules and assu
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Figure 2‐115 Seawater and Ammonia
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2.8.3.1.4 Removal of Platform from
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3 Development Plan, CDRL A021; 2.5
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Table 3‐1 Status of Key Technolog
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Component/SubsystemType Maturity Le
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3.2.2 RisksAny program of this size
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Risk NameHeat Exchanger CorrosionCW
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The configuration incorporates feat
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For the ammonia and seawater pumps,
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used. If adequate ground cover does
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level for fabrication and assembly.
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3.3.6.5 Long Lead ItemsThe followin
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provide for the measurement and con
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3.3.8.2.2 Ammonia CircuitAs the amm
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3.3.8.3 Integration of Machinery Sp
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2. Government‐Industry Partnershi
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Verify sensor calibration and proce
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3.3.11 Two‐Year Demonstration Pro
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Motions (classic six degrees of fre
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one of the flange joints or instrum
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Spar also provide a good opportunit
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Temperature rises- Submarine cable
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will be designed to store the data
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Figure 3‐6 Environmental Manageme
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Navy to support inherently governme
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thresholds. On the whole, the analy
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floaters) and nekton (larger motive
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Analysis NeedTradeoff analysis of s
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GeneralDesign of aquatic and marine
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3.4.2.6.1 Alternative Consideration
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2010; see Appendix J, Table 1) to d
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Qualified marine biologists will id
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solids, is very labor intensive and
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Figure 3‐9 Comparison of Daily Av
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Ocean Engineering should evaluate t
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The OTEC Mini‐Spar is an OTEC pil
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Figure 3‐11 Estimated Environment
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3.5 Program PlansA detailed MS Proj
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3.6 ROM Cost EstimatesThe SSOPP con
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3.7 Financing OptionsIn Section 1,
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AcronymsABSADCPAFBAFFFAH36AHTAHUAHV
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AcronymEBIEDASEEEEIPSEFDCEIPSEISEMC
Page 269 and 270:
AcronymINCOSEINUIPTIR&DIRIGIRPIVIWR
Page 271 and 272:
AcronymDefinitionOCCLOffice of Coas
Page 273 and 274:
AcronymTEAACTEWACTGATHDTLCTLRTNTSIT
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