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Topic: Turbine Getting Repaired!
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Turbine Getting Repaired! by Fairplay
Date: 18/04/2008 Time: 16:58:58
The "small repair" to the Nimpy windmill has turned out to be:

1. a new set of blades

2. A new rotor hub

3. a new generator

That leaves the pole as the only bit not being replaced.

All transported by mega-trucks from The Netherlands, and installed by Dutch engineers.

I wonder if it has actually produced enough energy to pay for all this, either in terms of electricity sales, or in terms of CO2 saving?

Perhaps one of the windy experts can comment on that?......and please use comprehensible units like pounds sterling or megawatt hours, not equivalent family car years or other such nonsense!

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Turbine Getting Repaired! by ***********N
Date: 18/04/2008 Time: 17:14:32
Did you know that the turbine needs electric from the power stations to start it up !!

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Turbine Getting Repaired! by Not Required
Date: 18/04/2008 Time: 18:00:03
The wind turbine can start fine on its own.

I assume the generator only starts taking off energy once the thing is going fast enough, and there is enough wind.

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Turbine Getting Repaired! by Windy
Date: 18/04/2008 Time: 18:26:00
The repair to the (13 year old ?) turbine has been:

1. A new set of rotor blades due erosion of the surface. The old blades could have been used, a bit less efficient, but it was appropriate to exchange while big cranes were on site.

2. A new nacelle (the housing on the tower). The fault was a crack in the yaw (steer in to the wind) bearing which required the nacelle to be removed. Once again, it was appropriate to replace the nacelle with a reconditioned unit while big cranes were on site.

3. The old blades were removed and the new blades were fitted to the existing generator (the big circular thing on the ground in the photos) which includes the blade turning mechanism.

4. A major part of this type of turbine is in the concrete hut and this was not replaced.

'All transported by mega-trucks from The Netherlands, and installed by Dutch engineers.'

Mega-trucks are used for all sorts of construction activity. Some obviously think that wind turbines should sprout, organically, from the ground and should justify this fantasy.

'I wonder if it has actually produced enough energy to pay for all this, either in terms of electricity sales, or in terms of CO2 saving?'

It has. Energy payback for wind turbines is around 1 year compared with typical lifetimes of 20+ years (site dependent), i.e. 20 times more energy produced than consumed. DTI/DBERR quote onshore wind and nuclear as similar lifetime CO2 costs, with overlapping and different assumptions.

The 'nympy' turbine has operated for less than 20 years - it is middle-aged rather than old-aged. In that time various developments of the technology have improved the longevity. If left un-repaired, it could have operated for some time yet. However, health and safety and maximising efficiency of production dictated this scale of repair. The turbine can now be expected to operate for at least another 20 years, with appropiate periodic small-scale maintenance.

I suppose that some drive cars until they (the car) suffer serious breakdown and then abandon them rather than perform appropriate and timely maintenance to maximise safe and effective operation ?

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Turbine Getting Repaired! by Not Required
Date: 18/04/2008 Time: 20:30:44
I suppose that some drive cars until they (the car) suffer serious breakdown and then abandon them rather than perform appropriate and timely maintenance to maximise safe and effective operation ?

Weird comparison Windy. I suppose next time I run my car I will ask for a subsidy from the Government and should it need a service well I'll get in some experts in from Holland / Germany.

The problem is Windy that the turbine has proved to be unreliable. It certainly hasn't produced any power for the last few weeks. Wonder how Ecotricity is supplying its customers. Certainly not from this turbine. Maybe the wind over in East Anglia has incresed therefore providing that much need extra boost since this one need minor maintenance. At least the generators were please not having to take into account fluctuating energy levels from some unrealiable source.

Ah well its alright because it will be back in action soon providing all that clean energy that is heavily subsidised only to stand still when the wind is insufficient or too fast. Great.

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Turbine Getting Repaired! by Spares
Date: 18/04/2008 Time: 20:59:45
Any large object placed outside, especially with moving parts is going to require some sort of regular servicing or replacement.

Trains/trucks/cars/ships/nuclear power plants, even your house ALL require a service and replacement of parts from time to time. Shock horror, some of it has to be imported from abroad. The wind industry is no different or do you think it's made of magic materials that never need replacement!

Future generations will be paying the huge price of nuclear when the plant becomes life expired and needs to be cleaned up.

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Turbine Getting Repaired! by 3
Date: 19/04/2008 Time: 11:00:27
The three wind turbines down at Avonmouth are well placed to always catch the wind!

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Turbine Getting Repaired! by Windy
Date: 19/04/2008 Time: 13:24:25
'Weird comparison Windy. . . .'

The 'subsidy' is not from the government. The 'subsidy' is a payment for the CO2-free component and is paid by the consumer of electricity. Your use of your motor car is subsidised as you don't (directly) pay its full, environmental cost. The 'experts' from Holland/Germany are the manufacturers - due to goernment mismanagement over the past decades the UK does not have large wind turbine manufacturers. The UK increasingly uses 'experts' from overseas for all sorts of things.

' . . . At least the generators were please not having to take into account fluctuating energy levels from some unrealiable source.'

Fluctuating POWER levels.

'. . . all that clean energy that is heavily subsidised only to stand still when the wind is insufficient or too fast. Great.'

The 'subsidy' is paid per kWh generated - no wind or too much wind (or shut down for maintenance) and no subsidy.

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Turbine Getting Repaired! by Scoglin
Date: 19/04/2008 Time: 23:12:07
I love nuclear power - I am an unashamed promoter of this practical green real alternative. Don't like nuclear? OK - choose between coal fired power power stations - nice and reliable but lots of pollution - or wind/wave power. It would be great if we all agreed to boil the kettle just once a week but it doesn't work like that.

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Turbine Getting Repaired! by Not Required
Date: 20/04/2008 Time: 11:41:23
So how does Ecotricity supply its customers when the Wind Turbine isn't working?

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Turbine Getting Repaired! by Joker
Date: 20/04/2008 Time: 11:51:22
Dale Vince's hot air ?

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Turbine Getting Repaired! by Not Required
Date: 20/04/2008 Time: 13:37:10
I was up there today, and it seems to be back in working order, though there wasn't much wind and it wasn't turning.

Just a digger left, and the gate and fence are not there.

I wonder, perhaps they could build a little kissing gate, or something, for the general public, when they remake the gate and fence.

A lot of people like to walk up to the thing, so why stop them?

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Turbine Getting Repaired! by Not Required
Date: 20/04/2008 Time: 14:46:25

Quotation:
love nuclear power - I am an unashamed promoter of this practical green real alternative.

And your solution for disposing of the waste is?

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Turbine Getting Repaired! by Not Required
Date: 20/04/2008 Time: 16:30:16
What do the French and Finish do ? I believe that it is stored underground in sealed vaults which are lead and concrete incased.

Another option is to store it in sealed glass / plastic resin which then harders when cooled and therefore is easier to store again within sealed compartments.

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Turbine Getting Repaired! by Fairplay
Date: 21/04/2008 Time: 09:56:02
Thankyou for the details of the repairs Windy. Of course all machines need maintenance, some more than others, and this has to be factored into their operating costs.

Do you have similar detail on the output of this particular windmill rather than the "average performance" you refer to. It would be interesting to see how it compares to the Avonmouth machines, where as 3 says, the wind seems to be more continuous.

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