I am designing a new, closed loop,chilled water system for our small injection molding outfit and can use some help where to begin. Here are some of my knowns:
Northeast NJ, USA, no air conditioning.
4 hydraulic machines( 2x250ton, 1x310ton, 1x400 ton), total HP, 210hp
4 molds, ~1 ton per mold
material is HDPE
I have 2 existing, relatively new, air cooled chillers, a 4 ton unit, and a variable speed 10 ton unit.
The 4 machines are located in a square, total piping for a loop to all would be ~ 250', 25' up in the air, would need 3 machine "drops"
My oil heat exchangers will have water savers @ ~ 105*F My molds should be ~ 55-65*F
I would like a central system, say a 500 gal. tank or so, cooled with my existing chillers and pumped through the loop to each machine, returned to my tank. Capability of adding say 2 more machines @ another 10hp + another 2 molds @ 1 ton each would be nice so lets say, 40 ton in an non-central setup.
I do not want a cooling tower
How should I go about calculating my circulating pipe/pump sizes? My 2 chillers have their own pumps In a non-central setup, I don't have enough chiller for my requirements ( 14 tons < 25 tons) Will 14 tons be enough in a central setup with 500 gal of water? If not, how do I calculate how much of a chiller i'd still need? My TO PROCESS goal for water temp. is ~60*F
Any guidance in any direction is appreciated