A battery has replaced Hawaii's last coal plant

Re:A battery has replaced Hawaii's last coal plant by arcticbull on Wednesday January 10, 2024 @06:45PM (#38945269)

It depends where you’re putting the waste heat. If it’s a small river or pond then it’ll heat the pond and meaningfully change the ecosystem. If you drop it into the ocean then nothing really happens because the ocean is pretty big. And a zero carbon source like nuclear will net reduce the temperature of the ocean if it replaces something like coal.

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Re:A battery has replaced Hawaii's last coal plant by darth_avocado on Wednesday January 10, 2024 @07:14PM (#38945533)

That’s not how it works though. The place where you release the water, a local hot spot is created and the heat takes a while to gradually dissipate. If you continuously release hot water, then a permanent localized hot spot is created.

This may work for some marine species, but will also be damaging to others. If it affects a keystone species negatively, like say corals, then a larger die off can happen.

This is the exact logic why desalination plants are widely considered bad. Yes, if you look at the entire ocean, you’re barely increasing the salinity of the water, but for the local neighborhood where the waste water is released, the salinity goes up to the point that even saltwater fish find it toxic.

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Re:A battery has replaced Hawaii's last coal plant by throwaway09223 on Wednesday January 10, 2024 @07:21PM (#38945586)

It's usually a silly complaint, though. The change is to a small area, and small areas are naturally different temperatures for all sorts of different reasons. Dredging the beach and changing the water elevation will have similar temperature effects.

At electric beach it creates a nice, unique ecosystem and there's nothing wrong with that.

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Re:A battery has replaced Hawaii's last coal plant by willis936 on Wednesday January 10, 2024 @07:40PM (#38945777)

I wouldn't consider the entirety of Gulf of California a small place. They're staring down environmental impacts from desalination plants.

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Re:A battery has replaced Hawaii's last coal plant by Turskarama on Wednesday January 10, 2024 @08:09PM (#38946062)

Desalination is a different process to heating though, for instance the sea won't lose excess salt to the atmosphere.

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Re:A battery has replaced Hawaii's last coal plant by labster on Thursday January 11, 2024 @12:05AM (#38947908)

The sea does lose salt to the atmosphere, just less than it does of water, so it doesn’t reduce salinity. Wave action releases enough salt to smell salt in the air, and a bit makes it up higher to provide cloud condensation nuclei.

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Re:A battery has replaced Hawaii's last coal plant by robertlagrant on Thursday January 11, 2024 @03:07AM (#38949210)

Wow! I didn't know that.

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Re:A battery has replaced Hawaii's last coal plant by throwaway09223 on Wednesday January 10, 2024 @11:25PM (#38947571)

It's a good thing the problem we're talking about doesn't exist there

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Re:A battery has replaced Hawaii's last coal plant by willis936 on Thursday January 11, 2024 @07:09AM (#38951164)

https://www.tandfonline.com/doi/full/10.1080/07900627.2023.2...

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Re:A battery has replaced Hawaii's last coal plant by throwaway09223 on Thursday January 11, 2024 @01:47PM (#38956802)

Yes, as your article clearly explains the problem we are discussing - heat pollution - does not exist there. The article is talking about salinity, not heat.

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Re:A battery has replaced Hawaii's last coal plant by mcv on Thursday January 11, 2024 @06:29AM (#38950825)

I think the issue is that location matters. What can be a huge problem in one location, might not be a problem in another location.

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Re:A battery has replaced Hawaii's last coal plant by markdown on Wednesday January 10, 2024 @07:20PM (#38945579)

So just dump the hot water a few kilometers out, where there's a desert.

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Re:A battery has replaced Hawaii's last coal plant by pests on Thursday January 11, 2024 @03:17AM (#38949275)

There is nothing inherent with desalination that requires releasing the salt back into the ocean.

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Re:A battery has replaced Hawaii's last coal plant by VBprogrammer on Thursday January 11, 2024 @05:48AM (#38950483)

There is a big difference between separating sea water into fresh water and a concentrated brine against separating sea water into fresh water and solid salts. If you could do the latter efficiently then it would be easy, put it back under ground or sell it to people as sea salt, use it to salt the roads etc.

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Re:A battery has replaced Hawaii's last coal plant by pests on Saturday January 13, 2024 @03:46PM (#38984378)

Is it that big of a difference?

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