How viable is this /sci/?

>>9142105
Why are you wasting the steam?
With steam you can generate even more power.

>>9142105
About tree fiddy

>>9142105
The tunnel could be shallower and just lead back into the water source. The water would go in a loop

How the fuck do you expect to evaporate this much water? There is a limit to how much vapor the air can hold.

>>9142141
Also, you don't get much energy out of the water if you just immediately put it through a turbine. The energy in hydroelectric come from kinetic energy in the water due to gravity.

you can't dig a trench that deep, the deepest borehole is only 9 inches in diameter
https://en.wikipedia.org/wiki/Kola_Superdeep_Borehole

>>9142152
That's the idea.
Dig a trench near the sea,
Seawater will rush to fill the trench.
Water flowing into the trench spins the turbines.

>>9142153
The deepest gold mine in the world is 3 and a half miles deep.
https://en.wikipedia.org/wiki/Mponeng_Gold_Mine

>>9142196
>The temperature of the rock reaches 66 °C (151 °F)
that may not be hot enough
you might have to dig the trench where the crust is thinner like on the sea floor

>>9142105
How is the water evaporating, isn't it cold that deep in the trench?

>>9142105
similar system already exist where we use the difference in temperature between the surface and some deep hole, the problem is that you would eventually cool of your deep hole and the system wouldn't work anymore, rock around your hole would cool off much much earlier before you'd run out of water

>>9142105
>3 mile trench
>near a body of water

Tidal is probably more energy per unit cost, easier to maintain, and, most importantly, possible. Plus, there's no sunlight or warmth hitting the water once it's a couple dozen feet into the trench. Hell, it might even freeze.

>>9142105

good luck digging a 3 mile hole that's also impermeable to water ingress

>>9142216
>>9142223

at that depth i would expect it to be pretty warm, we are using far far shallower holes for heating systems currently

>>9142196
Still didn't answer how you will evaporate all the water. Air can't transport that much water up the trench. Once the air is saturated with water, it won't absorb anymore.

/to add

Differences between sea turbines and conventional dams

-Dams can only be built along rivers
-Sea turbines can be built literally anywhere where the land meets the sea(can even be built on remote islands and supply power to the main land)
-Dams flood entire ecosystems if they break
-Sea turbines only flood their trenches if they break
-Dams will last as long as their rivers supply water
-Sea turbines will last as long as oceans supply water
-Dams are an eyesore
-The trenches of sea turbines can be used for BASE jumping locations and research centres.
-If seawater wont flood the trench and evaporate as theorized, the salt deposits on the bottom of the trench can be collected and sold, the mist/steam can be collected as fresh water

>>9142233
That's the only part that needs testing. Very little water from Angel falls actually got collected at the bottom and most of them evaporate back to the air. Hopefully the trench doesnt create its own weather, it wound up raining down there and eventually flooding the trench.

>>9142105
Even if you could devise a solution that is viable from an engineering point of view, the capital costs may be so high that building fission plants/solar farms/wind farms may be just better due to economies of scale and already existing expertise.

>>9142276
>That's the only part that needs testing.
Nope, its easy to just calculate.
Angel falls firs of all has a ton of air to get absorbed into. A trench is a very different scenario. And there is probably a large part of Angel falls that doesn't get absorbed into the air, it falls down as rain over a larger area, It just looks like there isn't much there on video's.

>>9142105
Where does the salt go?

File: geo.png (2MB, 1147x753px) Image search: [Google]

2MB, 1147x753px

>>9142105
Looks like a geothermal energy plant.

And I'm guessing there is a reason this is only effective in certain areas.

>>9142284
On the bottom of the trench. Can be collected and be sold to add to the turbine's revenue. Also since there's rare metals in the ocean, you can mine gold etc from the deposits. Plenty of use for the sea turbine/dam. There's also a chance to convert seawater to fresh water in large amounts due to the condensation.

>>9142282
Its environmentally safe and requires very little maintenance. You just need to build a very deep trench on the shore. Its only hazardous if you fall into the trench.
Fission plants may cause nuclear meltdowns, wind farms require around the clock maintenance(each rotor needs to be lubricated weekly for maximum efficiency) and can be a hazard if they cant stand high winds like in a hurricane or a typhoon(also useless if there are no wind).

>>9142125
The tunnel woul fill to sea level

>>9142353
Dude, you are constantly ignoring everything that makes it impossible to actually make this.

If you are truly exited about the idea, figure out first how much water you need to use, how far it will be dropped before it hits the turbine, then how much air it needs to be dispersed into for it to be totally absorbed and at what temperatures / humidity's.
By now you will know the dimensions of your plant, and realize it is absolutely impossible, and a stupid idea.

If you don't want to do all that, then just trust me on it being impossible, and move on with your life.

>>9142105

why would the water even evaporate?

goddamn, whites are fuckin retarded

>>9142387
It will evaporate In a confined space that is constantly cooled by seawater, without any sun and with already very humid air apparently.

So don't worry about that, the generator its maintenance free somehow, which makes up for it being impossible, so don't worry it.

>>9142285
The issue with geothermal plants is maintenance, with pipes corroding & any sort of leak being more or less impossible then to fix. Plus there also have been reports of earthquakes in switzerland (for example) during initial drilling & injection, but that's mostly just a PR issue.

With OP's system, there wouldn't be as much of an issue of corrosion, but the maintenance & infrastructure required to keep that trench up and running is probably pretty horrendous. There's also getting through the EPA for cries of "b-but muh ecosystem preservation," but you get that for pretty much any hydroelectric system.

To all the naysayers what will happen to water if you splash it to a hot surface? It will evaporate no?
3 miles deep below the sea level it gets really hot down there, theres bound to be some evaporation going on and the water should shoot back up.
Its essentially multipurpose geothermal. If this idea is tried and it works, we're not just getting cheap eternal power but were also getting large scale desalination. You just need to dig a hole, thats all.

>>9142387
Whites come up with stupid ideas all the time and all the time those stupid ideas work. Like the first guy that thought blowing hot air into cloth can make him fly and wound up inventing the hot air balloon. Whites take risks to better humanity, that's the difference between me and you.
Sorry for the /pol/ post, you hit me first, troll.

>>9142105
Not very. The water will eventually fill the hole. Digging deep holes is expensive.

The CIA came up with a better way to do this:
https://en.wikipedia.org/wiki/Qattara_Depression_Project

U cant just dig a hole near the sea like that. All the shit there is made of some sand etc, it would collapse

>>9142387
Yeah damn whites and their stupid ideas. Fuck science and technology, we should live in caves worshipping cows.

>>9142196
>https://en.wikipedia.org/wiki/Mponeng_Gold_Mine

http://www.mining-technology.com/projects/mponeng/

cool

Why isn't geothermal used everywhere ?

Is drilling a little deeper in places that are not hotspots, that uneconomical?

>>9142105
If it was viable we'd already have done it. Holes are expensive to dig, the pressure at the surface of a body of water is weak, pumping out the seeping water from the walls would likely cost more energy than provided, and the air in the tunnel would saturate with vapour quickly, meaning the rest of it would just pool at the bottom.

>>9142524
lol this guy is obviously a lame as engineer

ANYTHING is possible it's the power of science! Am i right /sci/entists? xD

>>9142453
Dude, you're an idiot.
Just because there is heat doesn't mean that it can evaporate however much water you put on it. Water evaporation is an incredible good way to get rid of heat. Initially you will get some evaporation, but as water cools down the surroundings, and the air gets more humid the amount you evaporate will quickly go down to 0.

If you are curios about what kind of power you need to evaporate large amounts of water, then try putting your finger on the heat element of a water boiler, and notice how long that heat uses to get rid of whatever water you put in it.

And you're not going to build the worlds biggest hole just to trickle small amounts of water down there.

>>9142353
gathering salt and transporting it up from a 3 mile trench has got to be the stupidest idea yet. The losses would ramp up every day lmao
"adding to the revenue" fucking lol

>>9142108
Found the engineer

>>9142519
same reason every surface isnt a solar panel

>>9142105
So, how fast does the trench fill up with salt, whale shit and dead seal.

>>9142519
It's as polluting source like fracking. Also, If it were widely used for centuries you'd eventually hit the problem of affecting the crusts/plate movement and global cooling of mantle heat, like global warming but real and actually irreversible. Mars died this way.

>>9143083
You don't dig that deep for geothermal.