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Governator to utilities: Invest in energy storage … maybe

By Kathleen Davis
September 30, 2010   |   5 Comments

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5 Reader Comments
Comment
1 of 5
September 30, 2010
I invented WindSolars, where all energy produced by wind would be stored as heat in thermal storage of Solar part. That way energy can be converted into electricity when needed, without use of bateries or any other expensive and complicated means to store it.
Comment
2 of 5
October 1, 2010
The problem with energy storage is the vast cost for merely wishing to use the energy at a different time.
A simple and cheap method in an offshore wind harvester is to use the wind to pull large buoys below the water and hold them there until wanted.
Electricity is not produced at the time of harvesting but mechanical energy is used to pull the buoys down. Only when the electric power is need are the buoys released to drive generators as they rise to the surface.
With gearing even the slightest breeze can add to the energy bank.
If real economy is needed, discarded tyres can be formed into cylindrical buoys (there are many millions going to waste). I have made such a buoy and have found that about 40 average car tyres produce over a ton of upward pull. With ingenious mechanical devices one collecting tower can have unlimited storage capacity.

Having devised this over 20 years ago I was told that there was no need. Perhaps the world is now waking up to the problems with renewable energy.
Comment
3 of 5
October 1, 2010
Back up batteries should be made more available at the consumer level. No need to stress the power companies and their poor run down dumb grids. They will need the excess capacity anyways for data flow.

Consumers with back up batteries available for their homes and for their vehicle re-charging stations are a key. The dollars that flow back into the system from the "free energy" consumers will acquire, will fuel the economy further. Why line the utilities pockets with the benefits that come from our natural resources? Quit trying to put a meter on the sun and wind.
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Comment
4 of 5
Anonymous
October 1, 2010
Denmark now receives over 35% of its electric needs from windpower. It turns out that hydrogen is the best cost effective way of storing electrcity (via electrolysis). Batteries are expensive since they have a life of only 5 years and must be replaced. Fuel cells and electrolyzers have lifetimes of over 15 years.


Denmark is starting to build their hydrogen valley consisting of a large number of electrolyzers and hydrogen/oxygen storage system. By the way, a fuel cell will put out 3 times its label-rated power when using pure hydrogen and oxygen instead of air.
Comment
5 of 5
October 3, 2010
There are many storage options besides batteries. The language of the bill allows all kinds of storage to qualify. Water transfer, flywheels, hydrogen production from solar power and other methods increase the workable time cycle of solar. Where does this idea come from that wind turns off at night? That is fantasy and we do not need solutions for non existent problems. Peak power usage is during daylight hours when solar systems are producing. Tidal and hydro power do not clock out. The deniers of solutions are just unworthy of consideration. A wide base of system types can solve all the needs.
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Kathleen Davis

View Kathleen Davis's Profile
About: Kathleen Davis is senior editor with POWERGRID International magazine and Electric Light & Power magazine (online at www.power-grid.com). Additionally, she serv... more »

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