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PRIMRE/Databases/Projects Database/Devices/Energy Island OTEC
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Energy Island OTEC
The basic 1,8 MW Open Cycle OTEC module is made up of 3 elements: The evaporator, essentially a cylinder of 9.2m diameter by 16 m high which is partially evacuated and fitted at its base with a surface hot water sump from which rise an array of sprinklers, which create a mist that changes phase to create a high pressure vapour, which loses the saline component of the original seawater. The low pressure Mitsubishi turbine is mounted with it’s shaft horizontal, between the evaporator outlet and the condenser inlet. It will deliver 1.8 MW of power, with 0.6 MW needed to power peripheral demands, such as hot and cold water pumps, vacuum pumps and other energy users. This leaves the turbine delivering 1.2 MW. The vapour from the turbine enters the condenser inlet, where it is directed to run through an array of cold aluminium heat exchangers, through which runs the cold water brought up from the depths acting as the coolant, the vapour condensing to provide large quantities of desalinated water, roughly 2.36m litres / day / MW
Additional Information
Device Status
Is the device actively being developed or is available for purchase (active)? Or has development or support ended (inactive)?
Inactive
Technology Type
Power Take-Off
Mechanism that converts the motion of the prime mover into a useful form of energy such as electricity, learn more
Salinity Membrane
Surface ExpressionTrue
Estimated TRL
Estimated Technology Readiness Level scale from 1 to 9 with 9 being the most mature technology
TRL Last updated: 4 May 2022
2
Energy Resource
- Thermal Gradient
Water Column Position
Surface
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Submerged - Mid
Entire Water Column
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Submerged - Bottom
Last Modified
5 July 2023
Projects Using Energy Island OTEC
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Citation Formats
“Energy Island OTEC.” Marine Energy Projects Database: Devices, PRIMRE, United States Department of Energy, https://openei.org/wiki/PRIMRE/Databases/Projects_Database/Devices/Energy_Island_OTEC. Accessed <day> <monthRoman> <year>.
Marine Energy Projects Database: Devices. <year>. "Energy Island OTEC." Accessed <monthRoman> <day>, <year>. https://openei.org/wiki/PRIMRE/Databases/Projects_Database/Devices/Energy_Island_OTEC.
