Theoretical analysis of the thermal resistance of non-uniform fouling on cross-flow heat exchanger tubes

Owen I., Buyruk E. , Barrow H.

APPLIED THERMAL ENGINEERING, cilt.16, sa.1, ss.43-50, 1996 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 16 Konu: 1
  • Basım Tarihi: 1996
  • Doi Numarası: 10.1016/1359-4311(95)00013-4
  • Sayfa Sayıları: ss.43-50


A theoretical analysis of steady-state heat conduction through homogenous fouling on the external surface of tubes in cross-flow has been made. Modelling the fouling geometry as an eccentric annulus, a finite difference procedure in bipolar coordinates has been developed to predict the effect of fouling on the thermal performance. Theoretical predictions for a range of geometry, thermal conductivity and variable convection boundary conditions are presented. It is shown how, for a range of foulant thickness, eccentricity and thermal conductivity, the rate of heat transfer to a given size tube can be reduced or increased. The case of non-homogeneity of the fouling is explored with a view to extending the analysis towards varying thermal conductivity.