Cooling Load Sizing

plasticschillers-front-pageTo size your production machine cooling load use the following information: Calculate the total lbs/hour of material your machine uses and divide it by the lbs/ton listed below for your specific process. This will give you the tons of cooling required at 50° F leaving water temperature.

When operating below 50° F you must decrease the rated chiller cooling capacity by 2% for every one degree F you operate below 50° F.

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To correct for 45° F operation you would divide the chiller rated cooling load by 0.9. See calculation: 100% – (2% x 5° F below 50° F) = 90% or 0.9.

INJECTION MOLDING = 1 LBS/TON EXTRUSION = 1 LBS/TON
30 lbs/hour HDPE
35 lbs/hour LDPE
35 lbs/hour Acrylic
35 lbs/hour PP
40 lbs/hour Nylon
40 lbs/hour Derlin
40 lbs/hour Urethane
45 lbs/hour PET
50 lbs/hour PS
50 lbs/hour ABS
50 lbs/hour PC
50 lbs/hour Acetal
70 lbs/hour PVC
SHEET CALENDERING

35 lbs/hour PE
60 lbs/hour ABS
60 lbs/hour PS

PROFILE

50 – 60 lbs/hour HDPE
50 – 60 lbs/hour LDPE
50 – 60 lbs/hour PP
50 – 60 lbs/hour PET
60 – 75 lbs/hour ABS
60 – 75 lbs/hour PVC

FEED THROAT:

1/2 ton up to 400 ton injection.
1 ton over 400 ton injection.

Barrel = 1 ton/” screw dia
Screw = 2 tons
Throat = 1/2 ton up to 3″
Throat = 1 ton 4″ to 6″
Gear drive = 100 hp/ton
(oil cooling)
BLOW HOLDING = 1 TON VACUUM FORMING = 1 TON
40 lbs/hour HDPE
40 lbs/hour PET
40 lbs/hour PVC
70 lbs/hour HDPE & LDPE
70 lbs/hour PP
200 lbs/hour PS
250 lbs/hour PVC
HOT RUNNER MOLDS convert heater watts to btu’s and divide by 2. (watts x 3.414 divide by 24,000 Btu’s)

MOTOR COOLING LOAD FOR PORTABLE CHILLERS

Hydraulic cooling: 8 hp = 1 ton
Vacuum pumps: 8 hp = 1 ton
Air compressors: 8 hp = 1 ton (internal oil cooling).
8 hp = 1 ton (after cooler cooling).
Chilled water flow rate is 2.4 gpm/ton.
Chiller ton is 12,000 Btu’s
Chiller operating temperature range with water is from 45° F. to 60° F. leaving water temperature.
Chiller operating temperature range with glycol/water is from 25 F. to 45° F. leaving water temperature.

 

 

 

packagedchiller
SA Series
Packaged Chillers
Non-expandable
(integrated pump tank)
1.5Ton – 20Ton
Single / Dual Circuits
Single / Dual Pumps
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SAE Series
Modular Chillers
Expandable
(pump & tank on
separate skid)
1.5Ton – 200Ton
Single / Dual Circuits
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SAR Series
Split Chillers
Expandable
(Outdoor Condensing Unit)
(pump, tank, evaporator on
indoor skid)
1.5Ton – 200Ton
Single / Dual Circuits