Studies of local heat transfer in a gas-liquid system agitated by double disc turbines in a slender vessel

In the paper, experimental studies of the distributions of heat transfer co efficient along the wall of the slender agitated vessel equipped with a dua l Rushton turbine system are presented. Thermal measurements for liquid and gas-liquid system were carried out by means of the special heat flux meter . The agitated vessel of inner diameter D=0.3 m, filled with liquid up to h eight H=2D was used in the studies. The profiles of the heat transfer coeff icient were obtained for different superficial gas velocities and impeller speed within the turbulent regime of the fluid flow. The distributions were approximated by Eqs. (25)-(30) and compared with the analogous profiles ob tained for the system with the single disc turbine. (C) 1999 Published by E lsevier Science S.A. All rights reserved.