Cooling Load Sizing

To 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.

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.

 

 

 

SA Series Packaged Chillers Non-expandable (integrated pump tank) 1.5Ton – 20Ton Single / Dual Circuits Single / Dual Pumps

SAE Series Modular Chillers Expandable (pump & tank on separate skid) 1.5Ton – 200Ton Single / Dual Circuits

SAR Series Split Chillers Expandable (Outdoor Condensing Unit) (pump, tank, evaporator on indoor skid) 1.5Ton – 200Ton Single / Dual Circuits