Preliminary designs for ocean thermal energy conversion (OTEC) stationkeeping subsystems (SKSS). Task I. Design requirements. Final report

Technical Report · Fri Jun 01 00:00:00 EDT 1979

DOI:https://doi.org/10.2172/5415697· OSTI ID:5415697

The results of Task I, Design Requirements, are presented. Environmental conditions for the Punta Tuna, Puerto Rico site are reviewed and synthesized to provide definition of current, wind and wave severity, direction, and occurrence for service, operational, and extreme sea states. SKSS performance requirements, including design life and watch circle, are followed by interface considerations particularly for the electrical transmission riser cable, and design criteria including safety and load factors. The SKSS concepts will be analyzed to evaluate performance, reliability, and cost. Performance analysis conducted included catenary anchor leg static calculations to size components, as well as drag due to environmental loads in the operational and extreme sea states for both ship and spar platforms. Dynamic analyses and trade studies to be conducted in Task II are presented. A reliability and risk assessment analysis of the three basic SKSS types - single-, multiple-, and tension-anchor-leg moors - was completed, indicating that the multiple-anchor-leg/multiple-point rotary or turret moor has the lowest risk-criticality for the ship, while that for the spar is the multiple-anchor-leg/multiple-point moor. The catenary single-anchor-leg/single-point moor has insufficient reliability for both platforms. The life cycle cost analysis methodology, including work breakdown structure, cost estimating, and cost minimization define the approach to costing to be followed throughout the study. The results of these design trades and analyses will first be applied to concept ranking required for recommendation of a SKSS concept for each platform.

• Research Organization: Lockheed Missiles and Space Co., Sunnyvale, CA (USA). Ocean Systems Div.
• DOE Contract Number: EG-77-A-29-1078
• OSTI ID: 5415697
• Report Number(s): DOE/NOAA/OTEC-5; LMSC-D-673832
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
MOORINGS
DESIGN
OCEAN THERMAL POWER PLANTS
OFFSHORE PLATFORMS
OFFSHORE SITES
BATHYMETRY
ANCHORS
COST
DRAG
DYNAMIC LOADS
FAILURES
LIFE-CYCLE COST
PERFORMANCE
PIPES
POWER TRANSMISSION LINES
PUERTO RICO
RELIABILITY
RISK ASSESSMENT
SAFETY
SHIPS
SIZE
STATIC LOADS
WATER CURRENTS
WATER WAVES
WEATHER
WIND
CURRENTS
GREATER ANTILLES
POWER PLANTS
SOLAR POWER PLANTS
140800* - Solar Energy- Ocean Energy Systems