Chiller expansion tank.

[Helper monkey]

Hello,
I am looking for help sizing an expansion tank for a chilled water system. It is an exsisting system and I don't know exact fluid content. Do I need to do a dilution test to get a accurate messurement. Can I just overestimate?

[Sridhar1312]

Expansion tank shall be kept at topmost level of the chilled water circuit.ideally it is better to calculate the total holding capacity of circuit .As a rule of thumb around 3% of the flow rate is adequate for expansion tank if it is chilled water system

[Brian_UK]

Document here has tables and calculations for sized expansion vessels.

http://www.mikrofill.com/images/PDF/n-and-de-range.pdf

[nike123]

Here is software for such calculations.

[Helper monkey]

THANKS Guys knew you could help