Evaluation of Immersion Coil Designs for Natural Convection-Driven Batch Cooling or Heating in Tanks

Various designs of immersion coils for batch cooling or heating of liquids in tanks were investigated to determine which design was most efficient. This equipment has direct utility in chemical batch processing operations and, particularly, wort cooling-a critical step in small-scale batch brewing o...

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Bibliographic Details
Published in:Heat transfer engineering 2000-10, Vol.21 (5), p.47-54
Main Authors: JOYE, Donald D, SMITH, Michael A
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Materials and auxiliary equipments used in energy engineering
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Summary:Various designs of immersion coils for batch cooling or heating of liquids in tanks were investigated to determine which design was most efficient. This equipment has direct utility in chemical batch processing operations and, particularly, wort cooling-a critical step in small-scale batch brewing of beer. This operation does not use a stirrer or agitation for a variety of reasons, hence it is dependent on natural-convection mechanisms for heat transfer, yet quick cooling is desired. Four basic coil designs with several permutations were evaluated. The results fell into four groups - best, good, mediocre, and worst performers. We found that coil placement and shape were design parameters that had a critical effect on the rate of cooling. Coil spacing also had a significant effect on the cooling rate when it was less than about 2 diameters.
ISSN:0145-7632
1521-0537
DOI:10.1080/01457630050127946