Paper presented at the 5th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, South Africa, 1-4 July, 2007.
The effect of different coatings painted on the heat
transfer surface of the horizontal heater in a vertical fluidized
bed heat transfer unit is studied. Polyurethane and
polyurethane based zinc coatings are applied on the horizontal
heat transfer surfaces and their effects on the heat transfer
coefficient are investigated for different heater heights,
different heater heat inputs and for different superficial
velocities. It is found that the application of polyurethane
coatings has decreased the heat transfer coefficient as
compared to the heat transfer coefficient obtained with the
bare uncoated heater. It is also found that by applying the
polyurethane based zinc coatings the heat transfer coefficient
has increased as compared to that obtained with the
polyurethane coating. Procedure and the results of the
experiments done to study this fluidized bed heat transfer
analysis are presented in this paper.
