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An analytical model for predicting the particle-deposited fin efficiency.

Author(s) : ZHAN F., ZHUANG D., DING G.

Type of article: Article, IJR article

Summary

Fins of heat exchangers are gradually deposited by dust particles in most application scenarios, and so a model of particle-deposited fin efficiency is needed for heat transfer prediction. In this study, the expression of fin efficiency for a particle-deposited annular fin was developed by simplifying the fin as two two-dimensional coating layers on a one-dimensional clean fin firstly, and then this expression was extended to rectangular fins with circular holes by the equivalent radius transformation. The analytical solutions for a typical rectangular fin show that the attenuation rate of fin efficiency may increase up to 23.9% if the fin surface is covered by a fouling layer with an average thickness of 4.0?mm. This model can be used to predict the heat transfer rate of fouled heat exchanger with multi-fins, and the validation results show that the accuracy of the proposed model is acceptable in engineering applications.

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Pages: 265-245

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Details

  • Original title: An analytical model for predicting the particle-deposited fin efficiency.
  • Record ID : 30024321
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 92
  • Publication date: 2018/08
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2018.03.021

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