Abstract
A compartment/population balance model is presented for describing heat transfer in gas-solid fluidized bed heat exchangers, modelling the particle-particle and particle-surface heat transfers by collisions. The results of numerical experimentation, obtained by means of a second order moment equation model indicate that the model can be used efficiently for analysing fluidized bed heat exchangers recovering heat either by direct particlefluid heat exchange or indirect tube-in-bed operation mode. The population balance model is validated with physically measured data taken from the literature [6].
Highlights
IntroductionWidely used in the metallurgical and process industries are important tools for recovering heat from hot solid particles [1]–[7]
Fluidized bed heat exchangers, widely used in the metallurgical and process industries are important tools for recovering heat from hot solid particles [1]–[7]. In these systems heat exchange with the wall usually is modelled by means of suspension-wall heat transfer coefficients which, in principle, are aggregates of two transfer components: gas-wall and particle-wall heat transfers
The aim of the paper is to extend the compartment population balance model to describe the heat transfer processes in fluidized bed heat exchangers in which the heat of hot solid particles is used to heat water flowing in tubes immersed in the bed
Summary
Widely used in the metallurgical and process industries are important tools for recovering heat from hot solid particles [1]–[7]. In these systems heat exchange with the wall usually is modelled by means of suspension-wall heat transfer coefficients which, in principle, are aggregates of two transfer components: gas-wall and particle-wall heat transfers. For modelling and simulation of collision heat transfer processes in gas-solid systems, an Eulerian-Lagrangian approach, with Lagrangian tracking for the particle phase [8]–[11], and a population balance approach [12]–[16] have been applied. The particle-particle and particletube heat transfers are modelled by collisions, while the gasparticle, gas-tube and tube-water heat transfers are described as continuous processes using linear driving forces
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
