Electricity From Tidal Power
Posted 07 April 2012 - 05:13 PM
It looks like they have started building the world's largest in Western Australia:
Way back in a high school chemistry lesson, on project management, if I remember correctly, there is a certain spot in Western Australia's far north that does not require any "environmental rearrangement" to become the world's largest tidal power plant. It had ideal placement to accommodate all considerations of such a project. One tiny problem down here... the Native Title Act! Three tribes of indigenous Australians all claim ownership of the area, so no construction work will ever be allowed there. They are refusing to budge on the issue.
Posted 09 April 2012 - 09:33 AM
Note that the linked article includes:
"Tidal power is not strictly base-load, but it is highly predictable, and therefore can be scheduled -- in lots of 25 minutes, 30 years in advance -- which makes it attractive to utilities. Cornelius will not reveal costings, but says tidal is more cost-competitive than offshore wind, but needs the support of a feed-in tariff, or some similar mechanism, to attract interest for the grid."
Cost competitive with offshore wind?
Definitely not much of a recommendation. Offshore wind is, so far, about as expensive per levelized kwh as any source of renewable electricity gets. Sounds like it's more expensive than photovoltaic. (See http://en.wikipedia....icity_by_source but factor in the age of the estimates)
Costs will come down for sure, but how much?
Posted 09 April 2012 - 01:29 PM
Posted 12 April 2012 - 05:33 PM
You see that even the wind farms are just beginning to be taken seriously by governments despite this is not the latest discovery in energy matters.
Posted 12 April 2012 - 06:13 PM
Posted 13 April 2012 - 06:47 AM
The initial high capital cost and the other issue such as the marine environment, location and indigenous peoples claim to the land can slow this technology from going ahead in the very near future. Once those great hurdles have been addressed and the infrastructure is in place, little more is required other than maintenance.
My preference to would be for Tidal power. I,ve never been keen on wind-power for aesthetic reasons and the killing of birdlife.
Posted 17 April 2012 - 07:51 PM
Posted 18 April 2012 - 07:05 PM
Now here are first question as a Dumb American who is not familiar with Australian maritime law, These are off shore usually a few miles from shore so could they not go forward with development using the offshore limits to get around the native title. 3-12 miles is considered territorial seas and 12-24 miles as Contiguous Zone if I remember my Australian maritime boundaries correctly, I could be wrong.
On the subject of costs as opposed to offshore wind. Guys off shore wind costs a fortune and a half, still learning is correct in the fact that it is the most expensive type of wind energy generation projects, for lots of reasons. So it would theoretically be cheaper per Kw hour, except it’s never been done before, so the estimates are just that, estimates of costs.
Really my wish is that something could be done to bring down the excessive cost of energy in Australia. I have actually made the comment at several meetings that “If Americans had to pay what people in Australia pay for electricity, natural gas, and petrol there would be a full scale civil revolt. After all the broken promises from the utilities and governments you guys just keep getting hit harder and harder and its really wrong. Let me know what you think.
Posted 20 April 2012 - 06:25 PM
Sorry, my last post looks quite unreadable!
From the article, I wish to highlight one important point that I missed previously:
"Atlantis already has a smaller turbine installed at Phillip Island near Melbourne which has been feeding electricity into the grid for the past nine months. Chief Executive Tim Cornelius says the Koolan Island facility will be the first time tidal power has been used to directly power an industrial facility."
My understanding of "directly power an industrial facility", consistent with frequency and reliability of the tide, is that there would be no need whatsoever for using batteries as storage! This would beat photovoltaic hands down, especially as photovoltaic solar cells degrade power output substantially under hot conditions (e.g., a 1.5kW system is measured as having a peak output in the middle of the day at just 1075W, due to severe degradation of a solar panel's 25 degree Celsius rating). Such an ideal of "power on tap" would reduce maintenance costs considerably. Of course, solar with thermal storage would be a viable option, but I do think it's important to diversify.
More than the funding, which down here we've always been short on, and the regulation of finance and the banking sector and investment incentive, is the culture which prevents anyone from getting ahead down here. The USA has a great system to fund innovation. Here, if someone or a company has a great idea, the first thing everyone else does is to try every way possible to cut them down. I think it has an expression... the "tall poppy syndrome". I don't have all the answers to this, but I think we will keep pushing for clean and green (with wise expenditure), regardless!
Posted 21 April 2012 - 03:20 AM
For tidal electricity generation there are at least two pretty different varieties. http://en.wikipedia....iki/Tidal_power
A tidal "barrage" is essentially a dam built across the mouth of an estuary with the electricity generation done much like an ordinary hydroelectric setup. Two sizable ones operating today. Definitely environmental consequences. Interferes with water transportation too.
The other kind, the tidal "stream generator" operates more like an underwater windmill. No dam. Less interference to the environment or to water transportation.
Posted 22 April 2012 - 05:35 PM
Posted 27 April 2012 - 01:39 PM
"Maine regulators on Tuesday put three utilities on the path to distribute electricity harnessed from tides
at the nation's eastern tip, a key milestone in a bid to turn the natural rise and fall of ocean levels into power.
The Maine Public Utilities Commission set terms for a contract that would be in place for 20 years.
The regulators also directed the three utilities to negotiate with Ocean Renewable Power Co. to put electricity onto the
grid this summer, the first long-term power purchase agreements for tidal energy in the United States.
"It's a landmark in the commercialization of tidal energy in the U.S.," Chris Sauer, president and CEO of the Portland-based company, told The Associated Press.
Officials in Canada are watching the Maine project with interest. Ocean Renewable and Nova Scotia-based Fundy
Tidal Inc. hope to install the same units in waters off Nova Scotia, where Bay of Fundy
offers even greater tidal power potential, officials have said."
Posted 29 April 2012 - 10:56 AM
Posted 15 May 2012 - 06:39 AM
Posted 09 August 2012 - 03:34 AM
Posted 09 August 2012 - 12:51 PM
Posted 05 June 2013 - 10:38 AM
Can you explain the basics behind :
Posted 07 June 2013 - 03:30 PM
Posted 08 June 2013 - 12:07 AM
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