this post was submitted on 11 May 2024
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[–] [email protected] 9 points 6 months ago (1 children)

I bet it's because there would be a lot of heat, especially when the tank's engines need to be more powerful to move all of the added weight.

[–] [email protected] 1 points 6 months ago (1 children)

1m³ of water is 1 metric ton, a normal tank would fit 3m³ to 5m³ given the fact that a normal modern tank is about 70 metric tons by itself i doubt it would greatly effect the engine. And water can be cooled as well.

[–] [email protected] 6 points 6 months ago (1 children)

I think you're discounting the heat already being generated even without the water. Water is a good conductor of heat, so if there are any hotspots the crew normally just stays away from, that would spread everywhere, including to the crew. The heat would also accumulate since the rest of the tank would be acting as an insulator except on the outside surfaces.

[–] [email protected] -5 points 6 months ago (1 children)

You know that air is harder to cool than water?

[–] [email protected] 6 points 6 months ago (1 children)

It's also harder to heat. That's what heat conductivity means...

[–] [email protected] -2 points 6 months ago (1 children)

Wich is why the motor wastes a lot of energy on cooling itself... Why do you think there is water cooling for electronic?

Air bein a isolator is a bad thing.

[–] [email protected] 2 points 6 months ago (1 children)

Yeah, and I'm guessing most people would prefer that energy be vented through the metal chassis into the air, not into the water they're working in. Heat takes the path of least resistance, and if lower the resistance to entering your body, it'll do that.

[–] [email protected] -2 points 6 months ago (1 children)

Its not vented it's necessary to keep a constant very strong airflow to keep the engine from burning. And heat moves up in both air and water, its not electricity that goes after resistance to find a path. And as said, you can cool the water, more easily than with air even.

[–] [email protected] 2 points 6 months ago (1 children)

Yes, you can cool water for the exact same reason that it heats up really fast.

And yes, it kind of is like electricity, in fact, good conductors of electricity are generally good conductors of heat. Electrical conduction happens through transfer of electrons, so atoms that can easily gain/lose electrons conduct electricity really well. Heat conduction happens through kinetic energy transfer, and and free electrons can transfer that energy to adjacent atoms by moving between them (like they do with electrical energy). It's a very similar mechanism.

Water is a much better conductor of heat than air because it's much more dense. So if you have a metal tank full of water, the heat is much more likely to be conducted through the water inside the tank than the air outside the tank. That's why water cooling is so effective, it sucks the heat away from the hot component, transports it to a radiator, which then spreads out the water (dramatically increasing surface area) to maximize the effectiveness of transferring that energy to the air (more opportunities for the cooler air to collide with the warmer water molecules).

[–] [email protected] -1 points 6 months ago (1 children)

I think you might have a reading comprehension problem man.

Last words to that, hot stuff expands and gets lighter per 1cm³ so hot water flows on top all the time, heat always moves upwards rather than down. Electricity travels very differently than heat does, heat is atom speed and electricity is electrons jumping

Relevant links:

https://en.m.wikipedia.org/wiki/Electricity

https://en.m.wikipedia.org/wiki/Heat_transfer

[–] [email protected] 0 points 6 months ago* (last edited 6 months ago)

heat always moves upwards rather than down

That's just not true. Heat moves along the path of least resistance, not "up," "up" just happens to generally be less resistance than "down" due to density differences in air.

heat is atom speed and electricity is electrons jumping

From your second link:

In other words, heat is transferred by conduction when adjacent atoms vibrate against one another, or as electrons move from one atom to another.

Density matters. Free electrons matter. But in short, metal and water conduct heat better than air, which means the heat transferred is more likely to go into the water than into the air. Certain metals conduct heat better than other metals, largely due to electrical conductivity.