Calculating head loss for chiller pump

[illuminum]

So I've been looking for an adequate pump for setting up a small JBJ 1/15hp chiller and have some questions regarding head loss. The chiller will require about 6-7 feet of tubing (~3.5' down and ~3.5'up).

So, if I get a submersible pump, would it count as 6-7' of head even though about half of the water is flowing downward vertically or is it less? The challenge is that submersible pumps that factor in that much head loss and have the right GPH won't fit into the rear chambers.

If I get an external in-line pump, and put it under the tank in the stand, will that be okay? I'd have about 2.5-3' of tubing before the water even reached the pump. If it is, then does the tubing feeing into the pump also count as head?

Tank: JBJ nano 28G LED
Chiller: JBJ 1/15th hp
Chiller flowrate :110-160GPH

This isn't my tank, but I thought I'd include it anyway. The tubing would go out from behind the tank, down into the stand where the chiller is, and then back up.

 

[Wazzel]

If you set it up as a closed loop (pumping to and from the same tank) there is no lift, just line losses. It does not matter if it is an external or submersible pump. There are tables that you can look up if you know the size and material of the tubing to get an estimate line loss. It is given in ft of loss per 100 ft of hose, most of the time. Losses are for the total of the hose, does not matter if it is before or after the pump. Keep your run on the suction side as short and as open as possible. Large restriction or long runs on the inlet side can cause problems (cavitation).

 

[Wazzel]

It has a name plate requirement of 110-160 gph a pump sized for 180-200 gph should get you in that range after losses.

 

[illuminum]

It has a name plate requirement of 110-160 gph a pump sized for 180-200 gph should get you in that range after losses.

Wazzel. Thanks so much for the quick feedback. Much appreciated! :thumbsup: