Re: THE Offshore Wind Thread (merged)
Posted:
Thu 25 Sep 2014, 04:29:16
by Ulenspiegel
The situation of offshore wind in Germany can -a little bit sarcasticly- characterize as: "Get the costs down or we will only support onshore wind". Since 2012 there is from a physical POV no need for ofsshore wind, 180 GW onshore would be 45.000 turbines, less than twice the number we already have (with smaller power rating).
Modern slow wind turbines around Hamburg (110 km onshore) have 3500-4000 FLH and cost 60% of offshore turbines with 4400 FLH. The German energiewende lives and dies until 2030 with onshore wind, PV is less important, ofshore wind would only be the icing on the cake.
The politics is to allow a minimum number of added offshore turbines in order to allow the developement of new generations of cheaper turbines and let the Brits pay a higher share.
Re: THE Offshore Wind Thread (merged)
Posted:
Thu 25 Sep 2014, 08:59:57
by ROCKMAN
“No project encapsulates the challenges facing offshore wind power better than Cape Wind”. Not even close to the truth:
“The Galveston offshore wind platform will be the first system operational in offshore waters of the United States. This system will confirm actual power production and also provide a means of providing potable water as a byproduct.”.
Lots of details:
http://www.treia.org/assets/2011/Events ... urbine.pdf
Re: THE Offshore Wind Thread (merged)
Posted:
Fri 26 Sep 2014, 02:51:17
by Ulenspiegel
@Greame
The Reuters article is partially wrong, the issue with offshore wind in Germany was and until 2020 is not money in the first place but technological bottlenecks: transmission lines are provided by the Dutch Tenet at a very low rate and some of the DC components (Siemens, AAB?) make more trouble than expected, we have actually much more turbines running than turbines that are actually connected to the grid. Therefore, the reduction of offshore wind capacity from the original 10 GW to 7 GW for 2020 had simple technical reasons.
With more money and a very optimistic construction rate of 1.5 GW per year after 2020, we would have around 20 GW offshore wind in 2030 at best, providing 80 TWh electricity, ~13 % of the demand.
OTOH, in each of the next 15 years a net value of around 2.5 GW onshore capacity will very likely be added and most of the old capacity will be replaced with modern one at the same time. I expect around 70-75 GW onshore wind in 2030, with an avarage of only 2500 FLH we would get at least 170 TWh electricity, with 3000 FLH around 220 TWh, this would be 35% of the demand.
In 2030 around 55-65% of the electricity demand will very likely be provided by REs in Germany, of these are ~30-35% onshore wind, ~10-15% offshore wind and ~10-15% PV, ~5% biomass.
Re: THE Offshore Wind Thread (merged)
Posted:
Mon 29 Sep 2014, 18:41:57
by Graeme
Ulenspiegel, Great to have your commentary. Here's more on the costs reduction for off-shore wind:
Use The FORCE: Cost Of Offshore Wind Energy Really Could Drop 40%We must have been asleep at the wheel when two industry powerhouses merged last year to form something called DNV GL, but we finally snapped out of it this morning when we saw this headline come across the wires: “DNV GL Pledges to Help Reduce Offshore Wind Costs by 25%.”
Actually, 25% is chump change compared to the sweet spot of 40%, which DNV GL reckons is feasible if other industry trends align with the growing offshore wind energy sector. That dovetails precisely with what CleanTechnica heard about the falling cost of offshore wind energy at the WindEnergy Hamburg 2014 trade fair last week, which came in at around 30–40%.
So, what is DNV GL and why is it so confident that the cost of offshore wind energy is set to fall off the cliff?
With an eye firmly on the emerging markets in North American and Asia as well as northern Europe, the manifesto consists of 14 specific actions, which DNV GL breaks into three sections. Two of them, “doing it right” and “doing it better” were developed in recognition that the offshore wind sector is already a mature industry with an existing platform of legacy technology and standards that will be here to stay for the foreseeable future.
cleantechnica
Re: THE Offshore Wind Thread (merged)
Posted:
Thu 25 Dec 2014, 22:34:02
by Newfie
Has anyone here done or looked at the total life cycle cost of off shore wind? Total, cradle to grave, including removal or reuse of the stump foundation?
P.S.
trying to answer my own question....below is what looks to be a pretty good study. They are coming up with about 150 euro/MW. damned if I know how that compares to other sources. Any info on that?
http://www.sciencedirect.com/science/ar ... 8114000469