Pressure or volume

nyyanks · 06-03-2003, 04:57 PM

Basically I have two questions for the WC gurus.
(Of which I hope to be one soon,when I get my WW)

It more important to have a higher pressure water flow in the loop or is volume more important? Now I'm sure a lot has to do with the waterblock used,restrictive or freeflow,so specifically I'm interested as it relates to the White Water.

Also does anyone have any thoughts as to the total volume of coolant in a system.Is more better,less better? It seems to me that the more the better and that the resivours that are common are just too small.

Any thoughts or special knowledge on either of these?

bigben2k · 06-03-2003, 05:29 PM

Welcome to Procooling!

You've got an easy question: volume is completely irrelevant.

Once all the components in your PC have stabilized in temperature, that's when your system is "in balance" or "equilibrium", kinda like that water temp needle in your car, on a cold winter morning: it'll eventually go up.

A larger volume of water will only delay the time it takes to reach that equilibrium.

As for the pump, flow (gallons per hour, or whatever) is important, but even more so is the pressure (psi) or head (feet). You ought to read Dave Smith's guide, on amdmb.com .

The White Water is the greatest block to date (pending a few things we're working on

), and will work very well with an Eheim 1048, or whatever pump has an equivalent flow rate and pressure/head. You ought to look at the review of it on overclockers.com

Blackeagle · 06-03-2003, 05:36 PM

Pressure (head rate) matters more than volume.

WW will make much better use of a pump such as the MD20rlz than a higher flowing version of that same pump, MD20rlt which has much higher flow but a much lower head rate (pressure).

The sustained temp of a system is what matters. And no matter the volume of coolant the system will reach it's balance point and stay there. A large rad does increase volume of coolant some, and a large rad lowers temps, but added volume in a large res means nothing.

The value of a res is in ease of trapping and removing air from your system.

And welcome to pro cooling.

nyyanks · 06-03-2003, 05:46 PM

Glad to be here have been lerking for a while just tring to learn.

OK I understand the volume thing, and that makes my attempt at watercooling a simpler install as I was looking to use a fairly large res. in my loop.

Now the pressure thing,so,just using round numbers here,20 psi is far better the 5 psi,right.Now is ther a point at which the higher pressure dosent provide any extra cooling?

jaydee · 06-03-2003, 06:20 PM

Quote:

Originally posted by nyyanks

Now the pressure thing,so,just using round numbers here,20 psi is far better the 5 psi,right.Now is ther a point at which the higher pressure dosent provide any extra cooling?

Sure, when the pump starts putting more heat in the water than it is helping take away or the friction from the water hitting the metal creates more heat than it is taking away. Either way a pump of that size capable of either of those is not going to be put into a computer case.

06-03-2003, 04:57 PM	#1
nyyanks Cooling Neophyte Join Date: May 2003 Location: NY Posts: 12	Pressure or volume Basically I have two questions for the WC gurus. (Of which I hope to be one soon,when I get my WW) It more important to have a higher pressure water flow in the loop or is volume more important? Now I'm sure a lot has to do with the waterblock used,restrictive or freeflow,so specifically I'm interested as it relates to the White Water. Also does anyone have any thoughts as to the total volume of coolant in a system.Is more better,less better? It seems to me that the more the better and that the resivours that are common are just too small. Any thoughts or special knowledge on either of these?

06-03-2003, 05:29 PM	#2
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	Welcome to Procooling! You've got an easy question: volume is completely irrelevant. Once all the components in your PC have stabilized in temperature, that's when your system is "in balance" or "equilibrium", kinda like that water temp needle in your car, on a cold winter morning: it'll eventually go up. A larger volume of water will only delay the time it takes to reach that equilibrium. As for the pump, flow (gallons per hour, or whatever) is important, but even more so is the pressure (psi) or head (feet). You ought to read Dave Smith's guide, on amdmb.com . The White Water is the greatest block to date (pending a few things we're working on ), and will work very well with an Eheim 1048, or whatever pump has an equivalent flow rate and pressure/head. You ought to look at the review of it on overclockers.com __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

06-03-2003, 05:36 PM	#3
Blackeagle Thermophile Join Date: Oct 2002 Location: U.S.A = Michigan Posts: 1,243	Pressure (head rate) matters more than volume. WW will make much better use of a pump such as the MD20rlz than a higher flowing version of that same pump, MD20rlt which has much higher flow but a much lower head rate (pressure). The sustained temp of a system is what matters. And no matter the volume of coolant the system will reach it's balance point and stay there. A large rad does increase volume of coolant some, and a large rad lowers temps, but added volume in a large res means nothing. The value of a res is in ease of trapping and removing air from your system. And welcome to pro cooling.

06-03-2003, 05:46 PM	#4
nyyanks Cooling Neophyte Join Date: May 2003 Location: NY Posts: 12	Glad to be here have been lerking for a while just tring to learn. OK I understand the volume thing, and that makes my attempt at watercooling a simpler install as I was looking to use a fairly large res. in my loop. Now the pressure thing,so,just using round numbers here,20 psi is far better the 5 psi,right.Now is ther a point at which the higher pressure dosent provide any extra cooling?

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