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Effects of air-side flow maldistribution on the heat transfer performance of polymeric air-coupled heat exchangers.

Number: 2192

Author(s) : BOMAN D. B., MOHAPI B., WEXLER J. S.

Summary

Developing innovative, high-performing liquid-air heat exchangers requires the use of novel materials and control over the geometry. Polymeric pillow-plate heat exchangers are a promising technology; however, due to the inherent flexibility of polymer films, variability in plate-to-plate spacing in these devices can lead to flow maldistribution on the air side. In this work, a model for predicting the heat transfer performance in the presence of these effects is developed and compared to experimental results for polymeric pillow-plate heat exchangers. The effects of variability are severe, with heat exchangers with a 1.0-mm spacing between plates showing over 50% reduction in heat transfer coefficient when the ratio of standard deviation to mean of the spacing exceeds 30%. The model is able to predict the results well for such compact heat exchangers, with an average absolute deviation of 11.3%.

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Pages: 10 p.

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  • Original title: Effects of air-side flow maldistribution on the heat transfer performance of polymeric air-coupled heat exchangers.
  • Record ID : 30030603
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2022

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