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post #11 of 19
Quote:
Originally Posted by Mainsil View Post

Yes, the pump is going the whole time the loop is open (top of res is off), once the liquid is above the level of the res. It can be done but it is tricky. If he were to turn the pump off with that res open, there would be a bit of a mess. Also, notice that he has the res sitting outside of the case, so even if the pump were to turn off, the resulting leak would be outside the case and wouldn't harm the components.

You seem to have a flawed view of how water in a closed loop works. Just because the reservoir might be 'open' (unsealed) does not mean water will come gushing out of it if it is lower in the loop.

Because the water loop is closed, it is not exposed to atmospheric pressure. This means that the water will act as a sealant within the loop and create its own pressure and 'vacuum' effects.

This might be simpler to explain with an example: For instance you are filling your loop and your pump/res combo with a fill port sits on the floor of your case. The radiator and water blocks are higher than your pump/res. When you start adding water into the res, then turn the pump on for a short burst, the water will travel up the loop. Once you turn the pump off to refill the res, as soon as more water hits the inlet port to the res, it creates a water seal.

The water seal will then be 'sucked up' into the tubing in the reverse direction (to the pump flow.) Think of a straw and what happens when you put your finger over the top and create an air suction. The liquid will then settle on the bottom parts of your loop, but not over flow out of the reservoir due to the trapped air at the top of the loop.

The only time you'll need to worry about fluid overflowing out of the res is if the res just 'empties' from the top (where the fill port is.)
Edited by pryat - 11/16/13 at 6:01pm
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post #12 of 19
Quote:
Originally Posted by pryat View Post

You seem to have a flawed view of how water in a closed loop works. Just because the reservoir might be 'open' (unsealed) does not mean water will come gushing out of it if it is lower in the loop.

Because the water loop is closed, it is not exposed to atmospheric pressure. This means that the water will act as a sealant within the loop and create its own pressure and 'vacuum' effects.
So, opening the res to the atmosphere does not expose the loop to atmospheric pressure, even though it is part of the loop? In any case, your build log is for you to showcase your work not for me to argue with you, so have fun experimenting. thumb.gif
Edited by Mainsil - 11/16/13 at 6:15pm
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post #13 of 19
My goal isn't to argue, but rather explain things.

This is an idealised diagram of what happens when you first fill your res and turn the pump on. The water forced by the pump will start to flow 'upwards' through the loop. (normal flow here is right to left)

Once you turn it off, the water be affected by gravity which will pull it back down.



Once it hits the inlet and fully covers it, it will make a seal. This seal will trap the air remaining within the closed loop. Since the force of gravity on the coolant is not larger than the pressure of the air that is trapped, the fluid will be 'sucked' up.



And will settle in a condition like above.

The only case when you should be worried is if the inlet port of the res is higher than or even with with the fill port. As the fluid feels the effects of gravity and flows back into the reservoir, it will not be able to create a seal forming a closed loop before it start leaking from the fill port.


Edited by pryat - 11/16/13 at 6:48pm
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post #14 of 19
Thread Starter 
Quote:
Originally Posted by Mainsil View Post

Quote:
Originally Posted by pryat View Post

You seem to have a flawed view of how water in a closed loop works. Just because the reservoir might be 'open' (unsealed) does not mean water will come gushing out of it if it is lower in the loop.

Because the water loop is closed, it is not exposed to atmospheric pressure. This means that the water will act as a sealant within the loop and create its own pressure and 'vacuum' effects.
So, opening the res to the atmosphere does not expose the loop to atmospheric pressure, even though it is part of the loop? In any case, your build log is for you to showcase your work not for me to argue with you, so have fun experimenting. thumb.gif

This is not me you are responding to. Just fyi.

Update on the build by the way, still waiting on the tubing...
Turns out Sidewinders was out of the size tubing I needed, and I never got an e-mail letting me know. I contacted them day before yesterday and they will be sending me a more expensive tubing at a discounted price. Hoping it will ship out tomorrow. thumb.gif
post #15 of 19
Quote:
Originally Posted by pryat View Post

That was a great explanation, pryat, just a bit incomplete--for all intents and purposes this diagram shows a barometer. So it's really a balance between the force of gravity on the water, the pressure of the trapped air, and especially the barometric pressure of the atmosphere coming through the open port that keeps it from spilling out.
Edited by threephi - 11/17/13 at 10:45pm
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post #16 of 19
Quote:
Originally Posted by Bridden View Post

This is not me you are responding to. Just fyi.

Update on the build by the way, still waiting on the tubing...
Turns out Sidewinders was out of the size tubing I needed, and I never got an e-mail letting me know. I contacted them day before yesterday and they will be sending me a more expensive tubing at a discounted price. Hoping it will ship out tomorrow. thumb.gif
Oops, sorry. Look forward to seeing your build!
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post #17 of 19
Thread Starter 
Tubing will be in tomorrow, so I hope to have the final build by this weekend. That all depends on spare time tho.
post #18 of 19
Looking forward to it. Even if you don't have time to finish it this weekend, interim pictures are always interesting, even if it is a parts unpacking! thumb.gif
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post #19 of 19
Thread Starter 
All that is left is to set it up and actually rivet the rad mount... The only issue? I seem to have lost my rivet gun... Assuming I find it, I will be uploading pics tonight.
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