LIFETIME PERFORMANCE OF WORLD'S FIRST OFFSHORE WIND SYSTEM IN THE NORTH SEA

LIFETIME PERFORMANCE OF WORLD'S FIRST OFFSHORE WIND SYSTEM IN THE NORTH SEA

https://www.windtaskforce.org/profiles/blogs/lifetime-performance-o...

BY Willem Post

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Decommissioning has started at the 26-year-old Vindeby offshore project.

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The 4.95 MW Vindeby offshore project was installed in 1991

It was located 1.5 - 3.0 km off the southern Danish coast.

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1991 Vindeby Offshore Wind Turbine System – Denmark

Years of operation: 1991 - 2016 (25y)

Capital cost: 75M Danish Kroner = $13M (1991$) = $23M (2017$)

Number of turbines: 11 each 450 kW

Lifetime generation: 243,000 MWh in 25 y, or 9720 MWh/y

Nameplate capacity: 4.95 MW

Average power output: 1.1 MW

Cost: $13 million/4.95 MW = $2,627/kW (1991$); $4,700/kW (2017$)

Lifetime capacity factor: 1.1/4.95 = 22.2%

Those wind turbines should have had a CF of about 0.30, but significant downtime, due to breakdowns/increased maintenance caused electricity production to be much less.

1) Levelized capital cost, including financing is $53/MWh (1991$), $95/MWh (2017$)


Calculate VOM

The calculation uses VOM at $130/installed kW-y, per industry data for 2015

The installed wind turbine capacity in operation was 4950 kW for one year.

VOM was $130/installed kW-y in 2015, or $134/installed kW-y, in 2017, after adjusting for inflation

Annual maintenance of turbines and cabling to shore is 4950 x 134 = $663,300/y (2017$)

Annual electricity production is 9720 MWh/y, as above stated

2) Levelized variable operation and maintenance cost, VOM: $68/MWh (2017$), or 6.8 c/kWh

 

3) Levelized miscellaneous cost, including Owner return on investment: $39/MWh

 

Total levelized cost = 95 + 68 + 39 = $202/MWh (2017$) See Note

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Not included are the following:

The levelized cost of decommissioning, i.e., disassembly at sea, reprocessing and storing at hazardous waste sites
The levelized cost of any onshore grid expansion/augmentation, about $20/MWh

The levelized cost of a fleet of quick-reacting power plants to counteract/balance the ups and downs of wind output, 24/7/365, about $20/MWh

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Maine Center For Public Interest Reporting – Three Part Series: A CRITICAL LOOK AT MAINE’S WIND ACT

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(excerpts) From Part 1 – On Maine’s Wind Law “Once the committee passed the wind energy bill on to the full House and Senate, lawmakers there didn’t even debate it. They passed it unanimously and with no discussion. House Majority Leader Hannah Pingree, a Democrat from North Haven, says legislators probably didn’t know how many turbines would be constructed in Maine if the law’s goals were met." . – Maine Center for Public Interest Reporting, August 2010 https://www.pinetreewatchdog.org/wind-power-bandwagon-hits-bumps-in-the-road-3/From Part 2 – On Wind and Oil Yet using wind energy doesn’t lower dependence on imported foreign oil. That’s because the majority of imported oil in Maine is used for heating and transportation. And switching our dependence from foreign oil to Maine-produced electricity isn’t likely to happen very soon, says Bartlett. “Right now, people can’t switch to electric cars and heating – if they did, we’d be in trouble.” So was one of the fundamental premises of the task force false, or at least misleading?" https://www.pinetreewatchdog.org/wind-swept-task-force-set-the-rules/From Part 3 – On Wind-Required New Transmission Lines Finally, the building of enormous, high-voltage transmission lines that the regional electricity system operator says are required to move substantial amounts of wind power to markets south of Maine was never even discussed by the task force – an omission that Mills said will come to haunt the state.“If you try to put 2,500 or 3,000 megawatts in northern or eastern Maine – oh, my god, try to build the transmission!” said Mills. “It’s not just the towers, it’s the lines – that’s when I begin to think that the goal is a little farfetched.” https://www.pinetreewatchdog.org/flaws-in-bill-like-skating-with-dull-skates/

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Hannah Pingree on the Maine expedited wind law

Hannah Pingree - Director of Maine's Office of Innovation and the Future

"Once the committee passed the wind energy bill on to the full House and Senate, lawmakers there didn’t even debate it. They passed it unanimously and with no discussion. House Majority Leader Hannah Pingree, a Democrat from North Haven, says legislators probably didn’t know how many turbines would be constructed in Maine."

https://pinetreewatch.org/wind-power-bandwagon-hits-bumps-in-the-road-3/

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