Pardon? how does that work please! Seems fascinating!
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Wind turbines causing rain? [Split from Mossdale.]
- Thread starter Ian Ball
- Start date
Pardon? how does that work please! Seems fascinating!
I think there could be four possible mechanisms.
1) Reduction of energy by each single turbine leading to a reduction of temperature
2) Blade and blade tip turbulence
3) Mixing of upper and lower airstreams, turbines are 130m high at the blade tip.
4) A macro effect that a windfarm has on the airstream.
The air temperature and dew point would need to be close
I have saved radar images which confirm absolutely this is happening.
Possibly of more interest to Dales cavers would be the Walney wind farm off Barrow.
RobinGriffiths
Well-known member
I guess that if a turbine generate x W of power, it's removing x Joules of energy from the cylindrical column of air that goes past the blades every second?
andrewmcleod
Well-known member
I rather suspect it's just that the wind farms show up on the radar in a similar way to rain rather than suggesting that they cause rain themselves...
Wind turbine wake clouds explained here: https://penbay.org/wind/ocean/2012/hornsrev_meteor_fog.pdf
If the rainfall radar are ghost images caused by the turbines themselves then the "rainfall" would be static, where as the rain moves along on the images I've seen. I've rainfall generated by turbines extending all the way into South Cheshire and beyond in North Westerly winds.
I'm not saying that there wouldn't have been any rain at all but normally precipitation would occur when the airstream hits the North Cheshire and North Wales hills.
Chocolate fireguard
Active member
That reference given by ChrisB pointed out that 2 airstreams at different temperatures, but both saturated, will always produce a supersaturated mixture, and hence condensation.
Because a graph of water vapour partial pressure (y axis) v temperature is not linear but is concave when seen from above.
It reminded me, sort of, of why 2 streams of water with different amounts of CO2, but both saturated with limestone, will always produce an unsaturated mixture, that will dissolve more limestone (a local enlarging often occurs at the junction of phreatic passages).
Because a graph of limestone solubility (y axis) v CO2 concentration is convex when seen from above.
It's practically the only thing I understand about cave formation.
Because a graph of water vapour partial pressure (y axis) v temperature is not linear but is concave when seen from above.
It reminded me, sort of, of why 2 streams of water with different amounts of CO2, but both saturated with limestone, will always produce an unsaturated mixture, that will dissolve more limestone (a local enlarging often occurs at the junction of phreatic passages).
Because a graph of limestone solubility (y axis) v CO2 concentration is convex when seen from above.
It's practically the only thing I understand about cave formation.
andrewmcleod
Well-known member
That reference doesn't mention precipitation at all, just localized cloud formation (fog, arguably).
Not saying it doesn't happen, just that you'd need reasonably good evidence to show it given that wind turbines definitely do interfere with rainfall radar.
Not saying it doesn't happen, just that you'd need reasonably good evidence to show it given that wind turbines definitely do interfere with rainfall radar.
I swear those Liverpool Bay turbines have motors in them to make them look like they're doing something when there's not much wind.Wind turbines cause wind silly. Otherwise they would be called rain turbines.
I would say as a general point that offshore wind is colossally expensive to install and maintain. There's about twenty highly expensive wind farm maintenance boats operating on the various Liverpool Bay wind farms every day. These aren't cheap to run with specialist marine crew and maintenance crew. Anyone who says renewables are cheap is a liar.
Only if you've wired them the wrong way so they use electric to turn and produce windWind turbines cause wind silly. Otherwise they would be called rain turbines.
ChrisJC
Well-known member
I agree. They should be onshore. A bloke in a ratty transit with a spanner is a lot cheaper than a boat.
Chris.
2xw
Well-known member
Trump was right. It's a conspiracy to use up all the wind!
Loki
Well-known member
Have you seen how many people drive into sellafield every day? 11000 employees and it stopped producing electricity in 2003!
It now processes the waste the nuclear industry creates. Just sayin’.
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