Head Loss Calculator on RC Question

[joe56]

Quick question, I hope someone can help with. :)

When the Head Loss Calc asks for "Vertical Length" do I account for flow going upward and downward? Or upward only?


I need to find a suitable powerhead for my chiller which is located directly beneath my tank. I have 3' 7" of tubing going from tank to chiller and 3' 7" going from chiller to tank.


Help a newbie out??

[collins]

resistance to the pump will be the pressure loss.

[Dyngoe]

Vertical head is the difference between the beginning and ending water level. If you are pumping from the main tank back into the main tank, then you will have (in theory) 0 vertical head. This is because the pressure down on one side will equal the pressure down on the other. This is simplified of course. So, again in theory, if you are pumping from your main tank, through your chiller and into a sump at a lower height, then you would actually have a negative vertical height since gravity would be pushing the water down when the pump is off.

[smcdonn]

as he said^^^^ vertical head is only the distance between the intake and the outlet. but you still have headloss with fittings