Preliminary designs for ocean thermal energy conversion (OTEC) stationkeeping subsystems (SKSS). Task II. Conceptual design. Final report

Technical Report · Fri Jul 27 04:00:00 EDT 1979

DOI:https://doi.org/10.2172/5276275· OSTI ID:5276275

The study is presented in five sections: design loads, conceptual designs, trade studies, cost analysis and concept evaluation and ranking. Extensive appendixes provide back up calculations and data to support the results. Environmental forces and yaw moments acting on the barge and spar in the various design sea states are presented including wave, wind and current effects. A parametric analysis illustrates the impact on holding power requirement of varying the return periods for operational and extreme sea state. The conceptual designs are presented for the barge followed by those for the spar, including configuration definition, performance characteristics, interfaces, areas for development, and deployment scenarios for selected concepts. The concept definition is followed by a set of trade studies that were performed to evaluate candidate anchor types and anchor leg materials. Parametric variations in anchor leg characteristics, wire-rope-to-chain length ratio for example, illustrate the influence of the significant design parameters on performance. An extensive cost analysis of the candidate SKSS concepts is presented, including cost estimates, life cycle cost scenarios leading to expected value of life cycle cost, and cost equivalence of operational failures. An evaluation of the eight SKSS concepts is presented, including assessment of performance and rankings based on risk versus cost and technology development. The appendixes include a report on the Electrical Transmission System interface, wave drift force, typical cost disbursement schedule and computer program listing, the IMODCO conceptual design report, and static configuration results.

• Research Organization: Lockheed Missiles and Space Co., Sunnyvale, CA (USA). Ocean Systems Div.
• DOE Contract Number: EG-77-A-29-1078
• OSTI ID: 5276275
• Report Number(s): DOE/NOAA/OTEC-6; LMSC-D-676379
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140800* -- Solar Energy-- Ocean Energy Systems
42 ENGINEERING
423000 -- Engineering-- Marine Engineering-- (1980-)
ANCHORS
BARGES
BUOYS
CABLES
CONDUCTOR DEVICES
COST
DESIGN
DIAGRAMS
DISASTERS
DYNAMIC LOADS
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
EQUIPMENT
EQUIPMENT INTERFACES
EVALUATION
FAILURES
INSTALLATION
LIFE-CYCLE COST
MOORINGS
OCEAN THERMAL POWER PLANTS
OFFSHORE PLATFORMS
PARAMETRIC ANALYSIS
PERFORMANCE
POWER PLANTS
RECOMMENDATIONS
RISK ASSESSMENT
SOLAR POWER PLANTS
STATIC LOADS
STORMS
WATER WAVES
WAVE FORCES
WIND