Author(s)

Ch. Na Ranong, J.Hapke & W. Roetzel

Abstract

The transient thermal behaviour of a heat shifting system consisting of two pure cross-flow heat exchangers coupled by a circulating flowstream is studied theoretically. A suitable mathematical description of the system is based on the energy balance equation for general flow processes yielding a system of coupled hyperbolic partial differential equations in two dimensions. System responses to perturbations of inlet temperatures and mass flow rates are numerically calculated with an explicit finite difference method. A criterion for the generation of computational grids minimizing effects of numerical dispersion and dissipation is applied to the system of coupled pure cross-flow heat exchan

Keywords