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The Energy Island: A Gigantic Offshore Battery?

Power storage is a critical challenge for adoption of intermittent renewable power sources and also for being able to help shift base load to peak load requirements. There are many approaches being pursued, but the Energy Island, conceived for off the generic viagra lowest prices coast of the Netherlands, is an extremely innovative concept.

The Energy Island

incorporates a new concept in pumped hydro storage — an inverse offshore pump accumulation station (IOPAC).

On the Energy Island when there is a surplus of wind energy, the excess energy is used to pump seawater out of the interior "subsurface-lake" into the surrounding sea. When there is a shortage of wind power, seawater is allowed to flow back into the interior "lake" through commercially available generators to cialis visa produce energy.

Ahh, pumped hydro storage. Something which we know well and that has been around since the late 19th century. Pumped storage works well as a partner to wind power, storing at roughly an 80-90% efficiency. Pumped hydro storage thus enables reliable power supplies with wind power.

Well, there is something new and innovative here. KEMA, Lievense and the Das brothers have designed an artificial island that would, in essence, be somewhat like a Pacific atoll, but the inner water surrounded by the outer ring would be sealed off from the larger ocean. The interior reservoir would be 50 meters deep, enabled by the mud of the seas off the Netherlands. And the island (the dikes/outer ring) would be made from the materials dredged to create the reservoir.

On that outer ring would be a long line of wind turbines for sending power ashore. When producing excess power, sea water would be pumped out of the enclosed lake into the surrounding sea. When there is greater demand, sea water flows back into the "lake," driving generators. The analysis to date suggests a 12-hour power delivery at 1.5 gigawatts (roughly equal to three coal-fired plants). The KEMA analysis suggests a total annual storage capacity of 20 GWh or "enough energy to offset 500 to 840 kilotons of CO2 emissions."

Note that the Energy Island truly does seem to be an island of energy. Not only the wind mills and electrical generators from sea water, but as well a chemical plant (better far from an urban area) and a liquid natural gas (LNG) terminal.

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Comments (12)Add Comment
written by Eric, October 03, 2007
what about building the island?? how long would the island have to function in order to offset original carbon costs? or are there islands in place already that they wish to modify?
written by Adrian Akau, October 03, 2007
Why not just apply this concept to dams. Excess energy from wind generators could pump water at the base of the dam back into the top to keep it filled so that the water would last during periods of viagra canada generic drought and there would be energy provided during windless times. No excavation would be necessary as in the buy tramadol overnight cod energy islands and we recommend soft levitra tablets with the rising water and strong storms due to Global warming, it would be much safer this way.

This e-mail address is being protected from spambots. You need JavaScript enabled to tramadol with no perscription overnight view it
High Tides
written by EV, October 03, 2007
Couldn't a similar approach be used to harness tidal energy? I'll admit one wouldn't have as much of a change in height for the water, but couldn't you have high tide come into an area, block it off, and slowly let out the water through turbines?

Some thoughts.
written by A Siege, October 03, 2007
Adrian ...

Hydro power storage, basically using damns, works well. (International Hydropower Association Pumped Storage Database)However, it is constrained as a storage device to where the water (the dams) exist and where there is adequate water for using the hydro-system as a storage unit. These are greatly constraining requirements. The Netherlands is not exactly dam/hydropower friendly.

EV -- There are tidal power generation approaches, with some EcoGeek/Energy COOL ones being proposed.

Eric -- RE carbon/CO2, excellent question.
RE Net Energy Balance / GHG Emissions ..
written by A Siege, October 03, 2007
RE Eric's comment above, best item I found (generally) about this subject area is this report: "Net energy balance and greenhouse gas emissions from renewable energy storage systems" ( Note that this does get into something like the "Energy Island", although one could see something like this in the Great Lakes off, for example, Chicago.
written by green engineer, February 27, 2008
Ingenious and yet so simple.
written by shrey, July 25, 2008
Very original an idea is just fantastic, what
kind of cost's and planning would be required to fund such an project ???
Energy Island
written by J.Thomas, January 23, 2009
The premise is "producing excess power" and with a current shortfall in energy I think this is tramadol fiddler online a false premise. All the energy would be required, and more, making the excavation redundant.
Roman Tide Mills in London
written by MyCottageHoliday, March 09, 2009
Reply to EV - tidemills have been in use for thousans of years. Here is a Roman one recently uncovered in London.
Nature's Power Potential
written by Uncle B, May 02, 2009
Not in opposition to this outline, but in concert with it, Wind farms can charge car batteries locally, without long, transmission lines and their inherent losses, after-all the cars move! We may see many smaller solar ventures, installed as battery charging stations throughout the parts of the land where feasible, along with coastal area charging stations using combinations of solar, wind and tidal generation, on a smaller scale for the automotive folks. Windy spots will certainly exploit free wind, over and cheap cialis above long distance transmission by wire, to charge batteries at a station, offering likely a battery exchange program for travelers. Close proximity to Nuclear power plants will mean cheap charges from dangerous fissionables, cheap in the over-night idling hours, sold by day when needed, much as gasoline today! We are on the cusp of a new, greater technology, and will be forced into it by the rising price and falling availability of buy now online viagra oil, carbon taxes, and the speed of development of the battery car. Keep in mind, as GM fails, American Uber-rich investment money flows like a flooding river to the Shanghai and Asia's stock markets and is converted to the new world currency the "Yuan" to finance the likes of the new Chev "Volt" Chinese knock-off, proven on the streets of Shanghai as taxis, in service, as we speak, sold to Israel, for asap delivery, and available by 2011 in the U.S.A. These new, cheaper to buy, Asian, "Battery and gasoline" cars will serve as an introduction to the new technologies, and ways of traveling, to be followed by Tesla, and their sedan and sports coupe, totally electric and very clean. A veritable flotilla of three wheeled ultra light super fast and next day levitra inexpensive commuter cars will follow, and the gasoline piston engined cars of no prescription tramadol ups delivered yesteryear will be no more! banned as a safety hazard to the new plastic bodied ultra lights, with prohibitive insurance rates ending their rule of the roads forever! Power Islands will furnish the where to find levitra factories for the ultra lights, like the Apetura from California, and the heavy industry, metal presses and all, will fade into the ashes of Detroit City, the Ohio Rust Belt, and the other 19th century dinosaurs, lost in time, recorded in history books but other wise forgotten to the common folk!
Already done
written by kyle, September 28, 2009
In Ludington, Michigan... 35 years ago
What happens...
written by someguy, September 29, 2009
... when it rains? The interior lake will fill up and all the precious potential for generating energy will be lost.

Might only be a minor problem. The general idea seems interesting, though (I'd just reverse it to pump water into the island and generate energy by letting it flow out - preferrably during low tide)

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