Wieland Prototype Pumpless 240mm AiO Cooler vs. Traditional Pump-Powered Rival

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This is IT! Connect it to large passive radiator nad you have high end 0db build - the holy grail.
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pretty neat, would love to have a loop that cool both CPU+GPU
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I could live without the noise from the pump. If the finished product hits the store shelves and doesn't cost twice as much as traditional AIO, I'll be quite interested.
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Lifespan might be long since it has no pump so def interesting
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The result should be even better with long and vertical (horizontal isn't good in pasive) radiator. Don't forget 3 things: - one tube on top of the rad and one tube on the botom, same on CPU WB - remember the coolant thermo dynamic rules (same as in a car if you don't remember) - small tubing make the coolant go faster
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rl66:

The result should be even better with long and vertical (horizontal isn't good in pasive) radiator. Don't forget 3 things: - one tube on top of the rad and one tube on the botom, same on CPU WB - remember the coolant thermo dynamic rules (same as in a car if you don't remember) - small tubing make the coolant go faster
Interesting, but does it actually move more volume? I would presume small tubing has more resistance and therefore moves less coolant?
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Pepehl:

Interesting, but does it actually move more volume? I would presume small tubing has more resistance and therefore moves less coolant?
Depends on pump pressure, normally. But without a pump it depends on the "force" the convection process can muster. That said, less restrictions would at least sound more sensible to a noob like me, because you can't just "up the pressure" at the pump. Definitely a key issue with a pump-less method.
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fantaskarsef:

Depends on pump pressure, normally. But without a pump it depends on the "force" the convection process can muster. That said, less restrictions would at least sound more sensible to a noob like me, because you can't just "up the pressure" at the pump. Definitely a key issue with a pump-less method.
Is this single-phase or two-phase? If it's two-phase, there's quite a bit of power to drive gas out of the CPU block, plus to suck gas out of the tube when gas in the radiator recondenses. Although I'm neither an engineer nor a physicist.
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Kaarme:

Is this single-phase or two-phase? If it's two-phase, there's quite a bit of power to drive gas out of the CPU block, plus to suck gas out of the tube when gas in the radiator recondenses. Although I'm neither an engineer nor a physicist.
I honestly don't know since I could not check the sources (I'm at work). Sure two phases gives more "push" to things, and I'm fairly certain they thought about it too. I'm just hypothetically speaking, since I am no physicist and not an engineer of the specific field.
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Kinda gets me to wonder why this hasn't been attempted like... 15 years ago. Modern heatsinks with heatpipes work on the same principle. The only difference is this thing has flexible tubing and likely can't depend on capillary action. I figure it wouldn't be too hard to make something like this at home using traditional liquid cooling parts. Put a check valve in your reservoir to force the flow in one direction and then fill the loop with something that vaporizes at low temperatures, such as naphtha. Sure, some of you might be squeamish at the concept of a flammable liquid inside your PC, but it's not like you need that much and good luck finding something else you can fill the loop with that isn't immediately carcinogenic or an ozone depleter.
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If the pump gets out of the equation , then an aio is suddenly interesting to me ... Before that one of the main issues I had vs just air coolers was the extra potential failure points of algae leaks witch are rare ....and more importantly the pump failing.... So I am all ears ! This thing has potential to be cheaper too since you do not need to pay for a pump
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fantaskarsef:

Depends on pump pressure, normally. But without a pump it depends on the "force" the convection process can muster. That said, less restrictions would at least sound more sensible to a noob like me, because you can't just "up the pressure" at the pump. Definitely a key issue with a pump-less method.
In passive system the coolant should be heated to make itself move, sadly it make it dangerous for CPU if it heat faster than the coolant due to inactivity. So the displacable volume need to be heated fast to start the coolant circuit. It's a bit like in old house with wide tubing compared to smaller tubing on modern house. One is not fast but transport lot of kw and one is fast but transport less kw. As no pump, fast is better for this use.