Comparisons between 2-D and 1-D Formulations of Heat and Mass Transfer in Rotary Regenerators

ABSTRACT

Comparisons between different types of formulations for the heat and mass transfer processes occurring in rotary regenerators are documented. Simulation results of a general two-dimensional mathematical model, including diffusion in the matrix as a localized process, are compared with the data obtained with its one-dimensional counterpart. This one-dimensional model is shown to be derived from the original two-dimensional formulation through an averaging procedure. The results presented suggest that the one-dimensional formulation can be used in desiccant wheel applications, whereas for enthalpy exchangers the more robust two-dimensional formulation is needed for certain design and operating parameters.

The authors acknowledge financial support provided by CNPq (Brazil) and the University of Illinois at Chicago.