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

More documents

Recommendations

Info

Preventive maintenance and inspection plans and procedures will be developed based on vendor andagency recommendations for final selected components. Maintenance intervention has beenconsidered for the following key components:Intake ScreensPumpsHeat Exchangers2.8.3.1.1 Intake Screen InspectionIntake screens on the warm water intake, bottom of the CWP, and at the top end of the CWP would beinspected using ROVs while the platform is moored on site. The exterior screens would useconventional thruster‐driven ROVs deployed and operated from the platform. The interior screen at thetop end of the CWP would be inspected and if necessary, cleaned, using a modified ROV that would belowered down the CWP’s 0.5‐m diameter stand pipe.2.8.3.1.2 Sea Water PumpsThe warm and cold seawater pumps can be replaced with the spar remaining in place. These pumps arelocated at depths of 30 and 55 m, (Figure 2‐115). Replacing them would require the use of divers orpurpose‐built remote intervention equipment. OTEC platform’s lifting gear would also be used.Configuration Report and Development Plan Volume 4Site Specific OTEC Pilot Plant 172
Figure 2‐115 Seawater and Ammonia Pump Locations2.8.3.1.3 Ammonia Pump ReplacementAs with the seawater pumps, the spar would remain in place during replacement of the ammoniapumps. Replacement would require the use of divers or remote intervention equipment.Outlined below in Figure 2‐116 and Figure 2‐117 are the steps necessary for pump replacement to avoidcontamination of the ammonia circuit. Two‐valve protection would be used at all six pump locations.Valve sequence, particularly in steps 3 and 7, is important, so as to avoid trapping ammonia or liquidbetween the valves. Any water that was not flash evaporated in Step 6 and became mixed with theammonia circuit would be removed by the ammonia‐water purge system.Configuration Report and Development Plan Volume 4Site Specific OTEC Pilot Plant 173
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 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:
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
Page 104 and 105:
throughout fatigue loading. Fatigue
Page 106 and 107:
De-mister: -45 m Turbine (Datum): 0
Page 108 and 109:
2.5.2 Power Generation Segment Over
Page 110 and 111:
Red = Thermal PowerGreen = Mechanic
Page 112 and 113:
The red‐shaded entries in the tab
Page 115 and 116:
components are shown in Figure 2‐
Page 117 and 118:
Figure 2‐67 Detail of Water Flow
Page 119 and 120:
The temperature and pressure sensor
Page 121 and 122:
2.5.2.6 Condenser Heat ExchangerThe
Page 123 and 124:
condensation process is gravity con
Page 125 and 126:
The Hx is constructed of alternatin
Page 127 and 128:
2.5.2.8 Working Fluid Subsystem2.5.
Page 129 and 130:
Figure 2‐78 OTEC Process Piping D
Page 131 and 132:
Figure 2‐79 Left: Magnetic Drive
Page 133 and 134: should have external insulation cap
Page 135 and 136: 2.5.3 Electrical Generation Element
Page 137 and 138: Axial‐impulse turbines, such as i
Page 139 and 140: The issue of operating in a marine
Page 141 and 142: Figure 2‐86 Functional Block Diag
Page 143 and 144: The requirements for the Power Deli
Page 145 and 146: 2.6.2 Onboard Distribution ElementT
Page 147 and 148: safety risks are mitigated. Further
Page 149 and 150: 2.6.2.7 Power Transmission ElementF
Page 151 and 152: The dynamic stress on the cable is
Page 153 and 154: Figure 2‐94 Submarine Cable Descr
Page 155 and 156: Table 2‐34 Mini‐Spar Motions, 1
Page 157 and 158: 2.6.2.11 Shore Grid Connection Elem
Page 159 and 160: 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
Page 165 and 166: VSAT Maritime Satellite Communicati
Page 167 and 168: Instrumentation (TSI) system. Beari
Page 169 and 170: 2.7.4.4 Electrical Power Delivery I
Page 171 and 172: Installation PhaseDetails3. Mooring
Page 173 and 174: 2.8.2.1 Ballast PlanThe ballast pla
Page 175 and 176: #2 Anchor Hook‐upThe spar is towe
Page 177 and 178: Figure 2‐107 Location of CWP Asse
Page 179 and 180: CWP Upending:The CWP is towed to th
Page 181 and 182: 2.8.2.5 Offshore Equipment Installa
Page 183: The following ground rules and assu
Page 187 and 188: 2.8.3.1.4 Removal of Platform from
Page 189 and 190: 3 Development Plan, CDRL A021; 2.5
Page 191 and 192: Table 3‐1 Status of Key Technolog
Page 193 and 194: Component/SubsystemType Maturity Le
Page 195 and 196: 3.2.2 RisksAny program of this size
Page 197 and 198: Risk NameHeat Exchanger CorrosionCW
Page 199 and 200: The configuration incorporates feat
Page 201 and 202: For the ammonia and seawater pumps,
Page 203 and 204: used. If adequate ground cover does
Page 205 and 206: level for fabrication and assembly.
Page 207 and 208: 3.3.6.5 Long Lead ItemsThe followin
Page 209 and 210: provide for the measurement and con
Page 211 and 212: 3.3.8.2.2 Ammonia CircuitAs the amm
Page 213 and 214: 3.3.8.3 Integration of Machinery Sp
Page 215 and 216: 2. Government‐Industry Partnershi
Page 217 and 218: Verify sensor calibration and proce
Page 219 and 220: 3.3.11 Two‐Year Demonstration Pro
Page 221 and 222: Motions (classic six degrees of fre
Page 223 and 224: one of the flange joints or instrum
Page 225 and 226: Spar also provide a good opportunit
Page 227 and 228: Temperature rises- Submarine cable
Page 229 and 230: will be designed to store the data
Page 231 and 232: Figure 3‐6 Environmental Manageme
Page 233 and 234: Navy to support inherently governme
Page 235 and 236:
thresholds. On the whole, the analy
Page 237 and 238:
floaters) and nekton (larger motive
Page 239 and 240:
Analysis NeedTradeoff analysis of s
Page 241 and 242:
GeneralDesign of aquatic and marine
Page 243 and 244:
3.4.2.6.1 Alternative Consideration
Page 245 and 246:
2010; see Appendix J, Table 1) to d
Page 247 and 248:
Qualified marine biologists will id
Page 249 and 250:
solids, is very labor intensive and
Page 251 and 252:
Figure 3‐9 Comparison of Daily Av
Page 253 and 254:
Ocean Engineering should evaluate t
Page 255 and 256:
The OTEC Mini‐Spar is an OTEC pil
Page 257 and 258:
Figure 3‐11 Estimated Environment
Page 259 and 260:
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
show all

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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?