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Page added on January 29, 2012
The BBC has a report on a wave power design from Britain – Plans for sea energy device Searaser.
A Devon inventor’s electricity from seawater generator could be sited at 200 points around the UK coastline.
Energy firm Ecotricity wants to develop a commercial Searaser for testing off Falmouth in Cornwall and put hundreds around the coast in five years. Dale Vince of Ecotricity said the potential was “enormous”.
The Searaser machine works by using wave energy to pump water up to container tanks and the water is then released to a hydro-electric turbine.
Searaser is the brainchild of British engineer Alvin Smith from Dartmouth. He came up with the idea about 10 years ago while he was playing with an inflatable ball in a swimming pool.
Searaser pumps seawater using a vertical piston between two buoys – one on the surface of the water, the other suspended underwater and tethered to a weight on the seabed.
As the ocean swell moves the buoys up and down, the piston works like a bicycle pump to send seawater through a pipe to an onshore turbine to produce electricity or to a coastal storage reservoir. It can then be released through a generator as required.
11 Comments on "Plans for sea energy device Searaser"
BillT on Sun, 29th Jan 2012 3:25 am
Pistons have parts that come from mines. Ditto, the turbines. This system will end shortly after the lack of oil stops the mining, as it will end all ‘alternatives’. I bet they don’t even build one of these boondoggles.
BTW: To prevent ground water and soil contamination around the reservoir, it will have to be lined with some kind of PETROLEUM based plastic, and probably covered also to prevent salt build up through evaporation. I didn’t see any of this addressed in the above ad for ‘stupid investors’.
concerned on Sun, 29th Jan 2012 6:07 am
I wonder how long those moving parts will last with salt water running through them 24/7.
Brian on Sun, 29th Jan 2012 10:06 am
BillT, I appreciate you taking the time to read articles and comment so thoroughly on them, but you honestly would live a little bit longer if you just tried to think positive for a few minutes of your life and at least hope that some cool things people working on out there might work. The only other option is to just end everything right now, so for the sake of some of us that are trying and hoping to solve the million problems humanity currently has, at least let us hang on to a shred of hope.
Norm on Sun, 29th Jan 2012 11:49 am
hmmm, its really no big deal to solve technical problems, like the plastic liner for the reservoir, and stopping the barnacles from crusting up the system. Still gotta be a scam, all in all. cause how many pistons would it take ? How big would the pistons be? How big a buoy? Doubtful it could be scaled up to produce large amounts of power. Might be good for a smallish system that powers some homes. Alt energy stuff is typically overrated for what it can produce. It doesn’t generate the big gigawatts.
BillT on Sun, 29th Jan 2012 3:08 pm
Brian, I have lived 67 years and seen a lot and dreaming is not my thing. I remember when we were promised that “nuclear electric would be too cheap to meter” just before Three Mile Island happened. The many other promises that were to come in the next few years from ‘technology’ that never happened. What actually happened is just the opposite. Automatic highways, electric cars, etc, all tons of BS from Madison Avenue.
You are free to be as hopey/changy all you want. I prefer to prepare and adjust as much as possible for the last decades of my life. I am enjoying my life and knowing what is and isn’t possible/probable is not a negative. It is reality I can prepare for. We are locked into the path we are on. We were warned 32 years ago that we should change and prepare. We laughed the guy out of office. Now we pay.
Bob Owens on Sun, 29th Jan 2012 5:44 pm
Why don’t we try the simple stuff? Send our unemployed around and insulate every house and building for free. Pay for it by reducing some of our military expenses. They will never miss it. That will generate more negawatts than all the hot air being pumped out by this stuff.
Kenz300 on Sun, 29th Jan 2012 7:46 pm
Instead of complaining and throwing our hands up in the air we all need to be working for and supporting solutions to the problems of the world. Lowering the rate of population growth can help, energy efficiency can help, new technologies can help. The world is changing. What can we do to make it a better place?
Gale Whitaker on Sun, 29th Jan 2012 9:09 pm
Have you read “Collapse” by Jared Diamond? There are a lot of wonderful people in the world. Unfortunately none of them part of the decision making process. This civilization is being run by a bunch of greedy fools and is bound to fail, just like all those that have come before us.
BillT on Mon, 30th Jan 2012 3:10 am
Did you know that your family of four spent $65 on military drones this year? Or that the same family spent $15,000 on your military – security budget this year?
$15,000 would have insulated your home quite well, put a PV solar system on your roof and cut your electric bills.
The bill would be higher next year and that would pay for 1/3 of a new hybrid car for your family.
What would you do if you had that $15,000 instead of the Military Industrial complex profiteers?
In 10 years, that would buy your family a new home. And, yes, you WILL be paying that $15,000 and more, per year for as long as you live…or at least as long as the Empire exists.
BillT on Mon, 30th Jan 2012 3:13 am
Dollars in my analogy is from these numbers from the internet:
$5 billion spent on drones in 2011
$1.2 Trillion spent on the military – security complex in 2011.
315 million Americans in 2011.
DC on Mon, 30th Jan 2012 3:19 am
@Bob
Yes exactly, the simplest solution of all our energy ‘problem’ is well…the simplest thing of all. Stop useing so much energy. Build things properly. The fact that we discuss the need for retrofiting so many North American buildings should be a huge red flag all by itself. Why not just come out and say our cities and buildings are garbages boxes? Its true. If we built things properly to start with, there would little need for improbable schemes like this one.
Tom Murphy over at Do the Math has a related article
http://physics.ucsd.edu/do-the-math/2012/01/the-motion-of-the-ocean/