What is the Optimal Water Flow Rate for Designing a Helical Coil Heat Exchanger?

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SUMMARY

The optimal water flow rate for designing a helical coil heat exchanger (HE) is critical for achieving effective heat transfer. The discussion emphasizes the importance of performing an energy balance to determine the heat rate before calculating the required surface area and number of turns in the coil. It clarifies that helical flow heat exchangers operate as true counter-current exchangers, similar to shell and tube exchangers, and suggests contacting vendors for specific designs. The context of using the coil in an ice room with room temperature water is highlighted as a key factor in determining the design parameters.

PREREQUISITES
  • Understanding of energy balance calculations in thermal systems
  • Familiarity with helical coil heat exchanger design principles
  • Knowledge of heat transfer concepts, particularly in counter-current flow systems
  • Experience with vendor specifications for heat exchanger products
NEXT STEPS
  • Research the design equations for helical coil heat exchangers
  • Explore the impact of flow rates on heat transfer efficiency
  • Learn about the thermal properties of water in ice and water baths
  • Investigate vendor resources for custom helical coil designs
USEFUL FOR

Engineers, thermal system designers, and HVAC professionals involved in the design and optimization of heat exchangers, particularly those working with helical coil configurations in low-temperature environments.

Davian Francis
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really need help in designing a helical coil HE. i know i must first do an energy balance to find heat rate.but what next?to find the area needed and the number of turns etc
 
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Helical flow heat exchangers with tubes are true counter-current exchangers and can be calculated the same as a shell and tube exchanger with one shell pass and one tube pass with the shell-side flow parallel with the tubes. Now, if you mean a spiral exchanger like this:

http://www.tranter.com/Pages/products/spiral/description-benefits.aspx

it's usually easiest to contact the vendor.
 
Last edited by a moderator:
Hey thanks for replying. But i was talking about a coil with one inlet one outlet..it will be placed on ice in an ice room, so exit water can be cold.
 

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Do you mean in an ice and water bath (good heat transfer, easy to calculate) or just buried in ice with no water (not so much)?
 
The coil will just be on ice basically. Room temperature water flows through the coil. So basically a need to determine the amount a turns and so forth to get the water cold.
 
Okay, what's your water flow rate?
 

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