Chiller selection

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Serve Over Counter

There are machines around that are not so efficient in hydraulic system heating and depending on the machine type, variable or fixed delivery pumps and an efficient unloading system.
Scanner

I asked my supplier and he would not give an approximation as he said many factors need to taken into account particularly about the mold.

Matt
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Raj

You probably have solved your problems another way by now, it has been a few months. But I felt I should comment.

It is not good to use machine tonnage for Chiller sizing.

Best is to use the process throughput Lbs or Kgs per hour.

Frinstance, rule of thumb.

Polyolefins are the worst as they store latent heat

30lb per hour for one chiller ton.

Polystyrene, 50 Lbs per hour.

PVC 45 lbs per hour.

PET 40 Lbs per hour.

All per ton of chiller capacity.

Your cooling tower will need 3 GPM per ton of chiller cooling.

There are machines around that are not so efficient in hydraulic system heating and depending on the machine type, variable or fixed delivery pumps and an efficient unloading system, you may have to allow on your tower for a significant hydraulic oil cooling load. I would suggest at least 0.1 ton per HP as the previous poster says. But talk to the machine supplier.

Hope this helps

Bob Burns

You will need 0.1 ton per motor horsepower. (I'm assuming it is an hydraulic machine). Add another 2-3 for feed throat. There you go, done. Of course if you want the chiller to cool a mold that you might want to hang in the machine, then we would have to know about the mold: ie steel or alum,size of mold, type of plastic, cycle time, number of cavities, total shot size and part weight barrel temps and ejection temps.
(I'm not really this smart, I just went through this with a chiller supplier and those are the questions they asked me.)