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tomqu7 Senior Member Joined: 09/11/2012 Location: AustraliaPosts: 168
Posted: 02:27am 10 Jun 2013
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windmills are classified for windspeed at hub
ie class 1 2 3
class one is designed for only 10 m/sec at hub in the german models most robust 2 a which is less
the average wind speed in melbourne from willy weather is 15 m/sec
there are no wind turbine manufacture that keep ups with rest of world
most are imported from china
/ windmills fall aprt in melbourne wind
powerednut Senior Member Joined: 09/12/2009 Location: AustraliaPosts: 221
Posted: 02:53am 10 Jun 2013
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Hi Tom,
I'm having trouble figuring out what you mean in a lot of your posts. Could you please slow down and think about what you want to say before you hit the submit button?
For example with your post above, what were you actually trying to say? Were you telling unwary newcomers to check the max windspeed rating of a wind turbine before buying and installing it? Or were you saying that Melbourne has been experiencing a period of average windspeeds some 3 times higher than the standard daily average for melbourne (3pm average windspeed=approx 15km/h (approx 4.2m/sec)), and that some turbines have been breaking as a result?
I've got no idea what "class one is designed for only 10 m/sec at hub in the german models most robust 2 a which is less" means.
I'm sorry if I'm being obtuse, or if I've given offence. Would you mind posting this again with a translation, or an expansion on your thoughts?
Downwind Guru Joined: 09/09/2009 Location: AustraliaPosts: 2333
Posted: 05:49am 10 Jun 2013
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Here, here,
Its always a struggle to work out what you post as text Tomqu7, and if you have a problem with basic English or other difficulties than tell us, as it makes it easier to then follow your question if we understand your thinking.
On what scale is that tested to, so we understand what class one is ?
In many ways i think you would believe any thing you read on the Internet as true and correct, and not question the source of information.
Edited by Downwind 2013-06-11Sometimes it just works
tomqu7 Senior Member Joined: 09/11/2012 Location: AustraliaPosts: 168
Posted: 08:34pm 29 Jun 2013
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the eurpean std has classes of windturbine depending on what wind speed they can take at hub
eg u see wind turbines advertised as class 1 etc
if u google small wind turbines the 4 th link down is a pdf by enhar and if u go to page 30
there is a table that recommends tower height for max production as 120 feet
I have plans and calc for cindys 2 kw at 9 metre tower now trying to get redrawn to 120 feet
tomqu7 Senior Member Joined: 09/11/2012 Location: AustraliaPosts: 168
Posted: 08:35pm 29 Jun 2013
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at pyramid hill in victoria in recent high winds in victoria
4 govt towers collapsed and fell into a heap
the nbn is building a 40 metre tower at mt helen
Downwind Guru Joined: 09/09/2009 Location: AustraliaPosts: 2333
Posted: 09:08pm 29 Jun 2013
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You really dont have much of a understanding of windmills do you?????
To raise the tower 4 times in height is a large engineering project, and the gain will not be worth the cost.
Also how do you intend to control the mill up at 36m, as i well expect the mills you have to flog itself to bits in constant high wind conditions.
Have you calculated the copper cable size required to have minimal losses in the 3 phase over the 40m or more run down the tower.
You might just find the losses out weigh any gain in height.
Have you priced large copper cable to see what additional costs will be added with 3 x 27m of extra cable.
How will you support the weight of the cables in the tower, as there will be many KG of cable weight.
Also if your cable is too small you will not be able to control the mill, as the line resistance will prevent effective braking of the mill in high winds, it will simply runaway and destroy itself.
I would think you might also need a red flashing light on top of the tower for air craft at night, although that might depend on your location, if required how would you install the light without extra slip rings and additional wiring.
It must be nice to live in a ideal world, where google tells you all the answers to lifes problems.
Sometimes it just works
Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498
Posted: 09:36pm 29 Jun 2013
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Try installing Chrome (from Google) as your web browser as it spell checks as you type. Might make your posts a little more understandable.There are only 10 types of people in the world: those who understand binary, and those who don't.
tomqu7 Senior Member Joined: 09/11/2012 Location: AustraliaPosts: 168
Posted: 09:13pm 09 Jul 2013
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I have to work this out
cindys turbines have a braking system one guy on this site designed the green square thing
I will try to get the blades welded on re they have many small screws and nuts
so 3 x 2 kw cindy turbines plus one 4 kw beawindhog.com has braking system where dump
engineer is increasing tower height to 40 metres and trying to get a see saw
bought black pipe but now use square tube to extend
the enhar pdf for victorian govt title small windturbines
shows at tower height of 120 feet u get 150% more electricty
in uk the big hardware store sold many roof mounts small turbines and
they had many disapppointing results because of the turbulence
tomqu7 Senior Member Joined: 09/11/2012 Location: AustraliaPosts: 168
Posted: 09:21pm 09 Jul 2013
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I am going to put in business park near fountain gate shopping centre where there is no height limit
I am on a factory block of 1/2 acre with a portable shed -a little humphy
at 120 feet u get 150 % more electricity see pdf by enhar small wind turbines where it states do not skimp on tower
120 ft tower handy as tilt ups next door
other location is a paddock that flooded knee high in recent victorian floods
and I am thinking of buying a 50 kw for there from huaya
if i could put one on my front lawn in ascot vale nr the melbourne showgrounds I would but I think the council would ban it
tomqu7 Senior Member Joined: 09/11/2012 Location: AustraliaPosts: 168
Posted: 09:32pm 09 Jul 2013
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where i want to put the turbines at fountaingate ( kath and kim country)
I also have a pv system on humphy shed
agl stuffed up and did not record me for the PFIT feed in at 0.68 cents
they first offered a small amount compensation but I refused
and now they are going to pay me as per my meter readings great
problem if u expand your pv system u lose your pfit feed in tariff and go back to .08 cents
my factory block is 2 blocks 10 and 12
so I have pv system at 10
wind turbines at 12
however I cannot put wind turbines thru my meter at 10 or agl may smell a rat
ie if I put thru 10 kw of wind turbine and panels
so I have to get a second meter for wind turbines ?????
do u know if u can have 2 meters eg one for home one for business out the back
tomqu7 Senior Member Joined: 09/11/2012 Location: AustraliaPosts: 168
Posted: 09:47pm 09 Jul 2013
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ipicked up the 4 kw wind turbine it weighs 85 kg and is over 4 ft long in box so driving around with it in my van till i get new plan of 120 feet re pdf small wind turbines by enhar
when I can leave it at fabricators who has forklift
the engineer is starting 120 ft plan this avro great
plan:----get plan then give to fabricator, leave 4 kw there
and buy more square tube if needed
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