chiller for 2 tier tanks

[sheristopher]

Hu, anyone has experience to use one chiller for 2 tanks and how?

[megacue]

Linked tanks or independent tank? Calculate by total volume of water as per chiller manufacturers spec

[DottyClown]

If its a linked tank, then won't the temperature in the first tank be lower than the 2nd tank?

It could be significantly lower depending on tank size and chiller power.

[sheristopher]

What do you mean linked tank?

[sheristopher]

2 tanks are separate. one top and the other bottom. If link, how can i link them? if not link, anyway for them to share the same chiller?

[kraken]

linked: meant the two tanks share the same circulated water.

you must link both tanks in order to use one chiller

[nicreef]

maybe use a external overflow box from top tank water goes to bottom tank and than chiller return back to top tank.

[dnsfpl]

yup...bottom tank as "sump" concept

[DottyClown]

If water flows from Tank 1 into Tank 2, and then from Tank 2 into Chiller, and then from Chiller back into Tank 1.

Technically speaking, in this set up, Tank 1 will experience a lower temperature than Tank 2. Temperature difference between tanks would depend on tank size, temp setting & ambient temperature.

[jxlex]

this setup would be like that of a typical Dt and sump setup... If tank 1 (DT) flow to tank 2 (Sump) and connected to chiller it will work...

Based on the flow rate thru the chiller, i don't think the difference btw top and bottom tank would diff much.

If bottom tank warms up, the chiller would kick in cooling down water and moving it down to bottom tank... Once initially chilling is complete should be fine

[sheristopher]

does using bigger external overflow will reduce the temperature difference between 2 tanks?

[jxlex]

Honestly i dont see any concerns as long as both tanks are linked together with a decent circulation

[kraken]

temperature difference will be neg. ~ 0.1/0.2 from my experience of mt DT temp and sump temp

[sheristopher]

Thank you all for advice