What is the pump head loss due to a chiller?

[grouper therapy]

jrosenblum;887248 wrote: So I did a quick experiment as follows:

1. I shut off my pump resulting in the water level of my sump rising. I calculated the volume of water represented by this increase, and then I turned on my pump and timed how long it took for the sump level to return to normal. This gave me a GPH of ~ 230 GPH. Thus, my GPH including chiller seems to be a terrible 230 GPH

2. I used the reefcentral.com head loss calculator to calculate what my GPH *should* be given my set-up minus the chiller. That answer came to about 562GPH @ 8.17 feet of head pressure.

3. I adjusted the vertical height on the calculator until it calculated an answer of 234 GPH with a resulting 11.8 feet of head pressure

Thus I estimate the chiller to contribute approximately 3.63 feet of head pressure (the equivalent of raising a Danner Supreme Mag 9 approximately 7 feet).

So, a 1/4 HP chiller adds about 3.63 feet of head pressure... Can anyone corroborate or have an intuition about the correctness of this?

Really no more than a guess with out knowing the configuration of the heat exchanger, the inlet and outlet size. How high if any is the chiller above the operating level of the sump and does it continue on to the tank??

 

[darrrenjmartin]

Doesnt it matter pressure pump or volume pump? Doesnt extra plumping effect a volume pump more...

 

[jrosenblum]

grouper therapy;887266 wrote: Really no more than a guess with out knowing the configuration of the heat exchanger, the inlet and outlet size. How high if any is the chiller above the operating level of the sump and does it continue on to the tank??

The chiller is on the floor on the same level as the pump and sump. 3/4 inch inlet and outlets on the chiller. FWIW, the overflow gravity drains into the sump (1 inch drain), the pump in the sump pushes the water through the chiller which is 45 inches away from the pump and back into the tank via the return. Its 3/4 inch everywhere but the drain.

Edit:

darrrenjmartin;887267 wrote: Doesnt it matter pressure pump or volume pump? Doesnt extra plumping effect a volume pump more...

The calculator I used takes into account my specific pump and plumbing details - horizontal and vertical tubing, valves, elbows, etc.