Temperature and concentration profiles are commonly modelled in wall-cooled or -heated packed beds by quasi-homogeneous models. The model coefficients depend on the kind of assumptions with respect to the flow profile and to the wall heat transfer mechanism. The coefficients presently available in literature and handbooks are based on plug flow and a wall heat transfer model which generates a temperature jump at the wall. In this paper we have conducted a comprehensive reevaluation of available experimental work with spherical particles and present a simple and consistent set of coefficients based on an uneven flow distribution and on a wall heat conduction model (Lambda(r)(r)-model). All coefficients have been found to be invariable upon bed-to-particle diameter ratio or bed length and applicable without additional adaptation to situations with and without an exothermic chemical reaction. The introduction of a wall heat transfer coefficient is not necessary.