Offshore wind. Fresh 'take' from the PBS Nova franchise. A 'hack' uses air bubbles. (Page 1/4)
rinselberg OCT 04, 08:13 PM
I have created offshore wind energy threads in this Totally O/T section before, but this recent 5+ minutes report from the PBS "Nova" franchise takes the coverage to a new level. It's the most offshore wind energy background packed into the briefest video segment that I think I've ever seen. And the hack that uses air bubbles to mitigate the propagation of underwater noise from the construction, as a way to reduce the adverse impacts on marine life... that just blows my mind.

It's no secret that in the U.S. and Europe, offshore wind energy development has encountered some serious "headwinds." It's proving difficult to manage the cost side of the equation. The "red ink", as it were, that has to be expended before the wind farms become fully operational.

This report, which aired as recently as August 2, puts the best foot forward (so to speak) for the offshore sector of the global wind energy playing field (so to speak.)

[This message has been edited by rinselberg (edited 10-04-2023).]

theogre OCT 05, 01:41 AM
Bubbles only help 1 issue...

Suggests people read Hurricane History for just last 20 years. Even just one to a few storms.
Many "News" agents like the term "Fish Storm" when doesn't make landfall but even those will wreck most eastern & gulf offshore wind farms.
E2A--> NOAA Historical Hurricane Tracks https://oceanservice.noaa.g...storical-hurricanes/ or https://coast.noaa.gov/hurricanes/#map=4/32/-80

Take wind map in the video & then overlay w/ Hurricane maps. No such thing is Hurricane Proof & part of why no oil drilling on East Coast. & why they stop & evacuate Gulf drilling for big storms.

Sandy Is part of Why No-one wants them near NY NJ DE & some states near them but Greenies.
A lot of NJ still have people "cleaning up" the damage for that.
Wasn't first time either... In early 60's NJ had a Hurricane tried to dig more inlets In the barrier island & peninsula wrecking both. Maybe same storm that trashed Texas Tower 4 in 1960, look up NOAA site: Donna 1960

Worse, Bet they won't clean up when, not if, offshore wind get wrecked because pieces will blown Miles away & even find the crap in/on the beaches days to years later.

+ Eastern Ocean Currents not just the Gulf Stream can push crap to UK & EU.
They are a big reason why Flight 19 & more will never be found because sea floor move a lot to bury whatever &or moves the light stuff until maybe drops of the continental shelf.
Only very heavy things like 2 Steam RR Engines near NJ stayed on the ocean floor for > 100 years. https://jerseyshorescene.co...ives-of-long-branch/

Related: Pacific "Garbage Patch" isn't just people throwing trash that the greenies claim but Typhoons, Tidal waves, Tsunami, etc washing huge amount of crap out to sea then currents trap the patch.
How 29,000 Lost Rubber Ducks Helped Map the World's Oceans https://www.youtube.com/watch?v=_UjAxuSuLIc

------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)

The Ogre's Fiero Cave

[This message has been edited by theogre (edited 10-05-2023).]

cliffw OCT 06, 05:38 AM

quote
Originally posted by rinselberg:
... the hack that uses air bubbles to mitigate the propagation of underwater noise from the construction, as a way to reduce the adverse impacts on marine life ... that just blows my mind



Hmm. You have never reported on impacts of marine life. What else do you know about it ? Evidently, you realize it is concerning.

Are you trying to allege that impacts on marine life only happens during the construction of big azz fans ? Are you trying to allege that an operating big azz fan makes no noise ? Are you trying to allege that a operating big azz fan makes no vibration ? Which is self noise to marine life ? Do you fish ? Ever heard of a "Rattle Trap Lures" ? Have you ever had a bent or out of balanced drive shaft ?

My self, I have drilled oil wells most of my life. Most deep wells. Working the pipe can cause bent pipe. It is recognizable while drilling, with the pipe 26,000 thousand feet into the bowels of the Earth. There are specialized companies which all they do is straighten pipe.
maryjane OCT 06, 10:09 AM

quote
Originally posted by cliffw:


Hmm. You have never reported on impacts of marine life. What else do you know about it ? Evidently, you realize it is concerning.

Are you trying to allege that impacts on marine life only happens during the construction of big azz fans ? Are you trying to allege that an operating big azz fan makes no noise ? Are you trying to allege that a operating big azz fan makes no vibration ? Which is self noise to marine life ? Do you fish ? Ever heard of a "Rattle Trap Lures" ? Have you ever had a bent or out of balanced drive shaft ?

My self, I have drilled oil wells most of my life. Most deep wells. Working the pipe can cause bent pipe. It is recognizable while drilling, with the pipe 26,000 thousand feet into the bowels of the Earth. There are specialized companies which all they do is straighten pipe.



The air bubble thing is nothing new at all. Been around for decades..it's just new to some people. Sort of like graboids. "Yeah Burt, everybody knows about'em, we just didn't tell you".

Up thru at least the early 90s, masker air and prairie air were top secret and even mentioning them openly could get you court martialed in the USN. Prairie air involves tiny bubbles; low pressure high volume air released along the leading and/or trailing edges of propellers. Mask air is the same thing, released all along underwater hull of a ship, especially outside noisy machinery spaces. Radar works great in air but not in water while sonar works great in water but has difficulty penetrating air. Air can also help defeat sound homing torpedoes, or could several decades ago, and could help mask speed and even direction a ship was traveling. Prairie/masking air subjects were among the things I had to sign off on, agreeing not to discuss them when I went thru gas turbine propulsion school for the then new Spruance Class ASW destroyer program. The high volume air comes from bleed air in the compressor section of gas turbine (jet) engines or on ships non GTE powered, from a specific electric powered compressor in one of the machinery spaces. The main problem with these systems is, that it doesn't work well at high speeds. Above 20 kts.


(Bleed air comes in two variants. Cool or hot. Cool air from one of the 1st sets of compressor blades and hot from the later compressor section. In aircraft, cool bleed air is piped into the cabin for air conditioning and hotter air is used for deicing control surfaces along wings and 'tail'.)

[This message has been edited by maryjane (edited 10-06-2023).]

williegoat OCT 06, 05:37 PM

quote
Originally posted by maryjane:
Prairie air involves tiny bubbles;..


Who knew?



Ho knew!
maryjane OCT 08, 11:37 AM

quote
Originally posted by williegoat:

Who knew?



Ho knew!



Don who?
rinselberg OCT 10, 11:05 AM
It didn't actually "blow my mind" about using curtains of air bubbles to mitigate the transmission of subsurface noise from underwater construction of offshore wind turbines.

I wasn't aware of that technique, and I had not encountered it before, in the context of offshore wind turbines.

When I said "it blows my mind," I expected the protection of the FTC's standard of commonly practiced advertising "puffery" in the commercial promotion of products and services.
williegoat OCT 10, 12:04 PM
rinselberg OCT 14, 05:06 PM

NEW JERSEY WIND PORT

"How Offshore Wind is Done"

October 12, 2023.
just under 3 minutes
New Jersey Economic Development Authority

Construction began in 4Q 2021.
82-T/A [At Work] OCT 14, 05:33 PM
You know how I feel about it Rinse... I think it's all excellent, the thing that irks me about this and solar is that China essentially owns the supply chain for it. So, 85-87% of all solar and wind power proceeds go to China...