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

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Figure 2‐17 Tank Arrangement2.4.2.2 Hydrodynamic ResponseA hydrodynamic analysis of the cell spar confirmed dynamic performance of the cell spar similar to aclassic spar of equivalent diameter. The plenums act as heave plates to damp heave motions. The spardesign was initially pursued due to the promise of limited motions and strain in the CWP. The analysisresults discussed in Section 2.3 above confirm this behavior, indicating strains low enough that the CWPmay be connected directly to the spar without the need for gimbal mounting.Configuration Report and Development Plan Volume 4Site Specific <strong>OTEC</strong> Pilot Plant 38
Hydrodynamic analysis to date has focused on response in the vertical, in‐service condition. Wet towdynamics may govern equipment and foundation design. An analysis of the wet tow condition isrecommended as the design progresses.2.4.3 Topsides2.4.3.1 General ArrangementThe topsides structure contains the power production equipment and provides wet tow buoyancy. It islocated well above the waterline for protection from extreme wave events. Figure 2‐18 shows the topdeck, or 02 level, of the topsides structure. Appendix B contains the complete general arrangementdrawing.Figure 2‐18 02 Level ArrangementConfiguration Report and Development Plan Volume 4Site Specific <strong>OTEC</strong> Pilot Plant 39
Page 1 and 2: NAVFAC Ocean Thermal EnergyConversi
Page 3 and 4: ContentsExecutive Summary .........
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: 2.4.2.1.1 Cell ArrangementThe OTEC
Page 53 and 54: Figure 2‐19 AccommodationsSource:
Page 55 and 56: d. (2) Able Seamen and (1) Ordinary
Page 57 and 58: Figure 2‐22 Platform Main Deck2.4
Page 59 and 60: The machinery that is located in th
Page 61: The air intake for the machinery sp
Page 67 and 68: 2.4.4.7 Fresh Water SystemsFreshwat
Page 69 and 70: 2.4.4.12 IncineratorAn incinerator
Page 71 and 72: Figure 2‐25 OTEC Water FlowConfig
Page 73 and 74: Figure 2‐26 Water Flow Through th
Page 75 and 76: configurations may be possible. Fur
Page 77: Z‐AXIS (+ UP)Z‐AXIS(+ UP)X‐AX
Page 80 and 81: 2.4.7.3 Upright In‐Service Condit
Page 82 and 83: The hull girder section modulus for
Page 84 and 85: 2.4.10.1.2 Post‐Demonstration Per
Page 86 and 87: 2.4.10.3 Anchor SubsystemThe variou
Page 88 and 89: The U.S. Navy provides recommendati
Page 90 and 91: 2.4.11 Cold Water Pipe Element2.4.1
Page 92 and 93: dynamic head with a period in the 1
Page 94 and 95: Figure 2‐45 First and Second Coll
Page 96 and 97: 2.4.11.2.4 CWP DynamicsThe CWP is s
Page 98 and 99: cycle, building added conservatism
Page 100 and 101:
Figure 2‐52 CWP Connection to Spa
Page 102 and 103:
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
Page 110 and 111:
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
Page 161 and 162:
communications protocols used for I
Page 163 and 164:
2.7.3.5 Safety, Security, Communica
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VSAT Maritime Satellite Communicati
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Instrumentation (TSI) system. Beari
Page 169 and 170:
2.7.4.4 Electrical Power Delivery I
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Installation PhaseDetails3. Mooring
Page 173 and 174:
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
Page 181 and 182:
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
Page 191 and 192:
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
Page 231 and 232:
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
Page 241 and 242:
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
Page 261 and 262:
3.6 ROM Cost EstimatesThe SSOPP con
Page 263 and 264:
3.7 Financing OptionsIn Section 1,
Page 265 and 266:
AcronymsABSADCPAFBAFFFAH36AHTAHUAHV
Page 267 and 268:
AcronymEBIEDASEEEEIPSEFDCEIPSEISEMC
Page 269 and 270:
AcronymINCOSEINUIPTIR&DIRIGIRPIVIWR
Page 271 and 272:
AcronymDefinitionOCCLOffice of Coas
Page 273 and 274:
AcronymTEAACTEWACTGATHDTLCTLRTNTSIT
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LM OTEC Mini Spar Design_December 2011 - Hawaii National ...

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