Modelling of natural-convection driven heat exchangers

M.H. Dirkse, W.K.P. van Loon, J.D. Stigter, G.P.A. Bot

Research output: Chapter in Book/Report/Conference proceedingConference paperAcademic


Abstract: A lumped model is developed for shell-and-tube heat exchangers driven by natural convection, which is based on a one-dimensional approximation. The heat flux is driven by the logarithmic mean temperature difference. The volumetric air flow rate is driven by the buoyant force. Based on the Boussinesq aproximation, this force is characterised by an analytic expression of the inflow and outflow temperatures. The lumped model is finished by relating the buoyant force to the friction force via the drag coefficient. The model was calibrated and validated based on Computational Fluid Dynamics calculations and physical measurements.
Original languageEnglish
Title of host publicationAgricontrol 2007 Proceedings of the 2nd IFAC Intern. Conf. on Modeling and Design of Control Systems in Agriculture, Osijek, Croatia, 3 - 5 September, 2007
Place of PublicationOsijek
Publication statusPublished - 2007
EventAgricontrol 2007 -
Duration: 3 Sept 20075 Sept 2007


ConferenceAgricontrol 2007


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