ISSN:
0006-3592
Keywords:
Chemistry
;
Biochemistry and Biotechnology
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
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.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/bit.260181104
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