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How do you Size a Recirculating Chiller?

ClassificationIndustry News 286

How do you Size a Recirculating Chiller?

 

What laboratories, plastics, lasers, semiconductors, medical, pharmaceutical, extraction, chemical and many more industries have in common is that they all require a recirculating chiller at some point in the production process. Determining the size of the recirculating chiller you need is as simple as following a formula. Even non-experts can do it as long as you have some facts.
There is a single and easy-to-follow formula for sizing the chiller you need. However, before you start, you must understand a few factors:

  • Inlet water temperature
  • the water temperature you need
  • flow

General size formula:

1. Calculate the temperature difference ΔT°F = inlet water temperature (°F) – desired cooling water temperature

2. Calculate BTU/hour. British thermal unit/hour. = gallons/hour x 8.33 x ΔT°F

3. Calculate tons of cooling capacity tons = BTU/hr ÷ 12,000

4. Oversize the chiller by 20% Ideal size (tons) = tons x 1.2

5. You have the ideal size for your needs

For example, what size recirculating chiller would be needed to cool a 10 GPM from 72°F to 58°F?

1. ΔT°F = 72°F – 58°F = 14°F

2. British thermal units/hour. = 10 gpm x 60 x 8.33 x 14°F = 69,972 BTU/hour.

3. Ton capacity = 69,972 BTU/hour ÷ 12,000 = 5.831 tons

4. Extra Large Chiller = 5.831 x 1.2 = 6.9972

5. Requires 6.9972 or 7 ton chiller

We are a professional manufacturer of temperature control equipment, supporting customized services, please consult us for details!

 


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