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A numerical model for a wet air-side economiser.

Author(s) : LOWREY S., SUN Z.

Type of article: Article, IJR article

Summary

Geared dehumidifiers operating at low indoor temperatures can experience condensation in the air-side economiser. In this paper we present a numerical air-side economiser model which accounts for condensation in the hot-side ducting. The economiser model has been integrated with an existing dehumidifier model and the overall model tested under two modes – economiser with smooth ducts and economiser ducts embossed with turbulence inducing ribs. Numerical results from the ribbed duct tests are compared with experimental test data and, in the absence of empirical transfer coefficients for wet, rib-roughened rectangular ducts, enhancement factors have been used to model rib effects. Model results are also presented for a varied number of hot-side economiser ducts and the numerical data show reasonable agreement with experimental data showing that the model is suitable for the design and analysis of geared dehumidifiers operating with plate type economisers.

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Format PDF

Pages: 38-53

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Details

  • Original title: A numerical model for a wet air-side economiser.
  • Record ID : 30016318
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 60
  • Publication date: 2015/12

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