This paper presents an experimental study of heat transfer in thin suspension films. The local values of heat transfer coefficient (alpha) are determined experimentally for the thin films flowing on the external surface of a vertical tube. The experiments were conducted on a pilot installation using PVC suspensions in water having the concentrations 10 kg PVC m(-3) water and 20 kg PVC m(-3) water respectively (the particle diameter was less then 50 mu m) for turbulent flow. The presence of the solid phase in the film causes an intensification of the heat transfer. In the case of Reynolds number Re = 2500, the suspension having the concentration 10 kg PVC m(-3) water amplifies the coefficient by 21 %, while for Re = 5000, by only 7.2%. The suspension having the concentration 20 kg m(-3) amplifies alpha by 13.5 % compared to the coefficient alpha for water films.