Direct-contact heat transfer with change of phase: a population balance model
Abstract
This paper presents a population balance model to predict the volumetric heat transfer coefficient for direct-contact evaporation in a bubble column. The model is based mainly on the energy balance and the population balance. Growth and breakage of droplets are taken into account in the population balance model. Experimental data for the volumetric heat transfer coefficient obtained in a column of 0.114 m diameter (Steiner, 1993) are used to validate the model. The predicted results are in reasonable agreement with experimental data at different temperature differences for various flow rates of the dispersed phase. Influences of the size distribution (mean value and standard deviation) of initial drops on the volumetric heat transfer coefficient are discussed.
- Publication:
-
Chemical Engineering Science
- Pub Date:
- 1999
- DOI:
- 10.1016/S0009-2509(99)00029-9
- Bibcode:
- 1999ChEnS..54.3861S
- Keywords:
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- Direct contact heat transfer;
- Direct contact evaporation;
- Population balance;
- Bubble column;
- Volumetric heat transfer coefficient