Heat transfer coefficients in finned‐coil stirred‐tank systems

Abstract

Steady-state and transient heat transfer coefficients were determined for a finned-coil, stirred-tank system using tlatblade turbine impellers in water. Fin spacing, flowrate, hot water temperature and agitator speed were varied for Re between 20 000 -110 000 for the agitated side.Individual transfer coefficients were calculated from the experimental overall coefficients. The correlation developed for predicting external transfer coefficients in agitated systems with finned-tube coils was tested against transient data.On a determink des coefficients de transfert de matiere en rCgime permanent ou transitoire pour des systkmes B reservoir agitC avec des serpentins B ailettes en utilisant des turbines a lames plates dans I'eau. On a fait varier I'espacement des ailettes, le debit, la temperature de I'eau chaude et la vitesse de I'agitateur, Re itant compris entre 20 OOO et 1 10 O00 pour la zone agitee.Des coefficients de transfert individuels ont ete calcules h partir des coefficients experimentaux globaux. La correlation etablie pour la prediction des coefficients de transfert externe dans les systkmes agites munis de serpentins a ailettes a ete comparCe aux donnies en regime transitoire.~ ~~

Artificial intelligence‐based correlation: Process side heat transfer coefficient for helical coils in stirred tank reactors

“…Aksan et al 13 (six‐blade paddle and water as fluid). Kizilcec et al 14 determined the HTC for a finned‐coil stirred tank (six blade paddle and water). Mohan et al 15 reported a review on heat transfer to Newtonian fluids in stirred tanks for both jacket and coil side heat transfer.…”