Heat transfer coefficients and two‐phase dispersion properties in a stirred‐tank fermentor
- 1 November 1976
- journal article
- research article
- Published by Wiley in Biotechnology & Bioengineering
- Vol. 18 (11) , 1517-1535
- https://doi.org/10.1002/bit.260181104
Abstract
Experiments were performed in a pilot scale 0.30 m3 conventional stirred‐tank fermentor using water, air/water, and air/K2SO4 solutions. Both single‐ and two‐stage impeller systems were investigated. Overall and tank‐side coefficients for heat transfer from a 0.012 m diameter coil were measured for a range of impeller speeds and superficial gas velocities. Power input, bubble size, and gas hold‐up were also determined. An analysis of the experimental results indicates that previously published correlations for single‐phase heat transfer in stirred tanks (of the type: Nu = C(Re)α(Pr)β) are not applicable for single‐ or multiimpeller gas/liquid systems. The introduction of air alters the mixing pattern significantly, affecting both average and local tank‐side heat transfer coefficients. Power input and gas hold‐up are suggested as the major correlating parameters for the determination of tank‐side heat transfer coefficients.This publication has 6 references indexed in Scilit:
- Transferts de chaleur a la paroi d'une cuve mecaniquement agiteeChemical Engineering Science, 1974
- Heat Transfer in Mechanically Agitated Gas-Liquid SystemsIndustrial & Engineering Chemistry Process Design and Development, 1973
- Heat and Mass Transfer in an Agitated VesselIndustrial & Engineering Chemistry Process Design and Development, 1965
- The continuous phase heat and mass-transfer properties of dispersionsChemical Engineering Science, 1961
- Heat Transfer Data for Kettles with Jackets and CoilsIndustrial & Engineering Chemistry, 1950
- Heat Transfer to vertical tubes in a mixing vesselIndustrial & Engineering Chemistry, 1948