Quote:
Originally posted by Skulemate
No, the diameter of the tubing won't matter one bit. Once the system has reached equilibrium there would be no change in the readings (though it would take longer to reach equilibrium if the tubes are a lot larger).
To convert a measured column of water into a pressure you need to multiply the column height by the specific weight of the fluid (specific weight is simply the mass density times gravity). Note though, if you're using imperial units, you'll need to make sure that you're working in the same units.
As for relating the results to the pumps head rating... well, you really can't without using the two manometers, one on either side of the pump (that will tell you how much head the pump is producing).
|
Well, I invisioned using water as the fluid, as pump head ratings are usually given as units of water. BTW your last paragraph shows that you and I aren't after the exact thing. I was mainly interested in seeing how much head a given device or string of devices adds to the system. I really wasn't concerned with what the pump is doing. I'm assuming that any pump would show the same results as long as the amount of head isn't enough to stall the pump. Is this correct or would flow rate have an effect on the results? The main reason for all of this is that I'd like to something like this in a WB round up " WB-A will add x" of head to your 1/2" system..." and maybe a bar graph showing the amount for the different WB's. Its just more info at hand when deciding to build a system. If I were able to see the amount of head added for cpu-wb, gpu-wb & a rad and added them up to equal 2-1/2' of head, that would be very useful info to have while shopping for a pump for my system. The performance curves of the pumps would then hold more meaningful info for me. You've got to bear in mind that a lot of you guys on this board are waaay more knowledgable about this stuff than the average user(including me). So what I'm really after is meanful numbers that are easily digestible. I read Bill's articles last night and for me it was information overload. I also noticed he measured the pressure drops across the blocks. I'm assuming this is very close if not the same as what we're talking about with only the units of measure being different. I also assume that his numbers/units could be converted to or used to calculate the amount of head. But like I say, this is a bit beyond me atm. You guys did answer my question if it was doable. Now I hope somebody does it 8) Thnx for the input and if theres more to add especially towards making this practical, please do.
peace.
unloaded