ricardo_wrx

They are thinking of building a wind farm 4km from my house, will this effect the value of my property?

Anyone had any experiance of this elsewhere in the UK?

pslewis

The noise they make is HORRENDOUS!!!

Sell NOW!!!

Pete

fast bloke

4 km? I wouldn't worry too much. I would be surprised if you even know it is there.

pslewis

Yeah, thats right, they are practically invisible!!!!

Pete

fast bloke

erm Pete - you mentioned noise - you being the engineering type you can enlighten us to how a device with a typical noise of 50dB at 200 meters will sound 'horrendous' at 4000m ?

fast bloke

correct me if I am wrong, but iirc dB level drops by 6 every time you double the distance, and the 50dB limit is measured outdoors, with a typical building dropping the level by a further 10dB. - That would leave the sound level at something around 14 dB in Ricardo's living room. What makes 14dB worth of noise? SOmeone breathing?

oik

What about house prices near windbags?

fast bloke

evening Oik - you get settled in OK?

oik

Yes, no thanks to being led a merry dance by you!

DIY

fast bloke

I wanted to give you a chance to have a nice quiet sit down to gather your thoughts

oik

I gathered dust!

Apologies for going slightly off track!

http://www.rics.org/NR/rdonlyres/662...inalreport.pdf

ricardo_wrx

very good guys! lol luckily for me i obtained the planning pack with the environmental survey on noise, views, wildlife etc.
All very interesting if your a badger living on the site...........

pslewis

Do you also get special treatment if you have a beaver in the bedroom

Pete

andy97

iTrader: (1)

I am thinking of going for a mini turbine for the house, something that will generate about 5kw. Before I commit to buying I will do a 1 year survey to see if wind levels are sufficient. The noise levels from these small turbines are extremely low. 30metres away the noise generated is as low ar 10-15db, virtually silent

ricardo_wrx

The problem may be the HUGE batteries that you will need to keep the power! Where do you buy such a thing from? Argos?

mattstant

ERRRr no you feed it back into the national grid and watch your electric meter go backwards

hedgehog

Using the manufacturers data from a recent installation in which I was involved in objecting too the sound pressure level at 80 meters from the turbine hub was quoted as 108.7dB(A). This is certainly far from virtually silent and clearly the manufacturer has every reason to make this figure appear as small and as appealing as possible.

If you treat the turbine as a point source (a slightly flawed treatment) and only consider an individual turbine (they usually come in flocks) then someone standing 320m from the turbine will exceed the Health and Safety action level at which employers have to take action and at which hearing damage is expected to occur in just 32 minutes.

Clearly different turbines will produce different SPLs but you wouldn't want to be within, literally, a mile of these ones if you wanted to keep your hearing. At your distance you might be OK but you'd still want to be careful.

Also, remember that the environmental survey is written by the people wishing to build the turbines. It may not be as fair and balanced as a result.

spufus

iTrader: (2)

These are very near my land.

I've never heard a thing.

Ovenden Moor, West Yorkshire

OS co-ordinates: SE 043 309

Yorkshire Windpower Ltd is a 50/50 joint venture between Powergen Renewables and EPRL. Under this partnership, two wind farms, Royd Moor and Ovenden Moor, are operated by Powergen Renewables in Coventry.

Ovenden Moor wind farm comprises 23 turbines with a maximum total output of 9.2 MW. The wind farm is located on Hollin Hill, near to Warley Moor reservoir, at a height of about 440 m above sea level, approximately 5 km north west of Halifax and close to the village of Wainstalls.

http://www.bbc.co.uk/bradford/360/ve..._ovenden.shtml

ricardo_wrx

wow, thanks for the info. the more i look at the proposal, the more i think it will be fine.

Wurzel

iTrader: (1)

YOu must have differnet wind turbines to us in Germany then! considering I have stood under the one that over looks the Bayern Munich football stadium and could not hear a thing. Apparently the only noise you can hear from it is on particularly windy days when the blade make a chopping sound as they spin round. However they need to be spinning pretty fast to make any serious noise, a slight wooshing noise perhaps but nowt to right home about.

I would get your UK ones checked if they are making over 100db

andy97

iTrader: (1)

This is the type of product I was looking at

spec sheets http://www.provenenergy.co.uk/images...ifications.pdf

Andy

mad_dr

[QUOTE=hedgehog]Using the manufacturers data from a recent installation in which I was involved in objecting too the sound pressure level at 80 meters from the turbine hub was quoted as 108.7dB(A).QUOTE]

Blimey - if the maximum noise at a track day is 100db at 1 metre and a car roars past 20 feet from you making quite a noise, how many time louder must the turbine be at 1 metre for it to produce 108.7db at 240 feet?

andy97

iTrader: (1)

This a paragraph from the dti website

State-of-the-art turbines with capacities higher than 1 megawatt generally have source noise levels of between 100 and 106dBA. Therefore, a modern turbine has to be placed at a distance of between 200 and 300 metres from the receptor to reach a sound pressure level of between 45 and 50dBA.

the link is here http://www.dti.gov.uk/renewables/renew_3.5.1.3.htm

ricardo_wrx

The problem is here in the UK is that we are all animal lovers and hate to see them homeless because of some giant windmills! Not to metion our obsession with health & safety! You can't go for a **** in this country anymore with out filling in a risk assesment form!

hedgehog

It must be said that I was amazed at this figure as well and it may not be typical for all wind turbines, however it was the manufacturers figure as quoted in the environmental survey by the people wishing to put the turbines up so I would be pretty sure they had no reason to inflate the figure and I would have expected to have seen a correction if they had made a mistake. Needless to say noise is one of the major sources of objection.

That figure is quoted at 80m from the hub and for every doubling of distance you get a decrease in SPL of 6dB assuming a standard hemispherical model based upon a point source. Of course the turbine isn't quite a point source which is what complicates the issue and, in some cases, allows them to tweak the figures a little.

There was no indication of the spectrum of the noise produced but, clearly, the A weighting should give a good indication of its apparent loudness no matter what the spectrum.