2. Determine how many lbs./hr. are required for each ton of cooling capacity on Cooling Capacity see Chart #1 at the right.
3. Determing if extruder or any auxillary equipment will require chill water. If not go to Question #6.
4. Size equipment cooling capacity based on Chart #2 and Chart #3.
5. Combine process and equipment cooling requirements.
6. Size chiller by rounding up to the closest standard unit.
|
Injection
Molding
|
30#/HR
H.D. Polyethylene
|
=
1 Ton
of Cooling Capacity |
|
35#/HR
H.D. Polyethylene
|
||
|
40#/HR
Nylon
|
||
|
50#/HR
Polystyrene
|
||
|
65#/HR
PVC or Polycable
|
||
|
70#/HR
P.E.T
|
||
|
Extrusion
|
50#/HR
Polyethylene or Polypropylene
|
|
|
75#/HR
Polystryene
|
||
|
80#/HR
PVC
|
||
|
Blow
Molding
|
35#/HR
Polyolefins
|
|
|
Air
Compressor (No After Cooler)
|
.16
Ton/HP
|
|
Air
Compressor (With After Cooler)
|
.2
Ton/HP
|
|
Vacuum
Pump
|
.1
Ton/HP
|
|
Hydraulic
Cooling
|
.1
Ton/HP
|
|
Hot
Runner Mold
|
.1
Ton/10.5
|
|
Water
Pump In Circuit
|
.2
Ton/HP
|
|
Feed
Throat - 400
Ton Machine and Above |
1
Ton
|
|
Below
400 Ton
|
1/2
Ton
|
|
Gear
Box Cooling
|
1
Ton/100 HP
|
|
Feed
Throat - 3"
Screw or Less |
1
Ton
|
|
Above
3" Screw
|
2
Tons
|
|
Barrel
or Screw Cooling
|
1
Ton/Inch of Screw Diameter
|
What size chiller is needed for a polypropylene molding operation that
incorporates a 6oz. "Shot Size" and a 18 second cycle time with
a 3 H.P. hydraulic motor?
1.
6oz. / 18sec. = 19.99 oz/min (20.00 oz./min)20oz. / min x 60 min. = 1200
oz/hr
1200/16 = 75 lbs. / hr
2.
Polypropylene requires 1-Ton of cooling capacity for every 35 lbs./hr
processed
75 lbs. ÷ 35 lbs. = 2.14-Tons of cooling
3. A hydraulic motor requires, 1-Ton/HP of cooling capacity
4. 3 HP x .1-Ton/HP = .3-Ton of capacity
5. Combine process & auxillary cooling requirements 2.14-Ton . 3-Tons = 2.4-Tons
Solution: This application will require a 3-Ton unit
Home
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| Inventory | Contact
COLD SHOT
CHILLERS™.
14020 Interdrive West.
Houston, TX
77032
V - (281) 227-8400 / F - (281) 227-8404
mmarrone@waterchillers.com