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Heat transfer in reacting systems: Heat transfer to nitrogen dioxide gas under turbulent pipe flow conditions†
Article first published online: 17 JUN 2004
Copyright © 1961 American Institute of Chemical Engineers
Volume 7, Issue 2, pages 277–281, June 1961
How to Cite
Krieve, W. F. and Mason, D. M. (1961), Heat transfer in reacting systems: Heat transfer to nitrogen dioxide gas under turbulent pipe flow conditions. AIChE J., 7: 277–281. doi: 10.1002/aic.690070222
- Issue published online: 17 JUN 2004
- Article first published online: 17 JUN 2004
- Manuscript Accepted: 15 DEC 1960
- Manuscript Revised: 9 DEC 1960
- Manuscript Received: 6 JUN 1960
Heat transfer rates of both heating and cooling for dissociating nitrogen dioxide gas were experimentally measured under turbulent pipe-flow conditions. The range of the average Reynolds numbers for which these measurements were made was from 6,700 to 22,000. Thermal flux at the inside surfaces of the tubes ranged from 300 to 8,400 B.t.u./hr.-sq. ft. for heating and cooling. Wall temperatures of the heater section were varied from 100° to 400°F. and those of the cooler section were varied from 70° to 140°F. Mixed mean bulk gas temperatures for both heating and cooling were in the range 72° to 190°F. Radial velocity and temperature profiles were measured at various longitudinal positions in the heater section.
For this equilibrium gas mixture heat transfer coefficients as high as 14 times those for the gas under frozen equilibrium conditions were obtained. Correlations which should be generally applicable to equilibrium reacting systems have been determined from the experimental data.