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MINIMUM OF EXERGY CONSUMPTION IN HORIZONTAL FLUIDIZED HEAT EXCHANGER

DOI: 10.1615/ICHMT.2009.CONV.1360
page 14

Artur Poswiata
Warsaw University of Technology, Faculty of Chemical and Process Engineering, Poland

Z. Szwast
Warsaw University of Technology, Faculty of Chemical and Process Engineering, Poland

Abstract

The paper presents a methodology and results of calculation for optimization of horizontal fluidized heat exchanger. In the fluidized bed the fine solid particles are heated by flowing hot gas. The hydrodynamics of the bed and heat transfer kinetics are described by Kunii and Levenspiel’s two phase model. As the performance index the function describing total cost of the process is applied. The process costs are expressed in exergy units. To the optimization calculation the continuous optimization algorithm of Maximum Principle was used. For considered problem the profile of inlet gas temperature as well the inlet gas total flow are searched. The analytical solution which describes the temperature optimal profiles for various hydrodynamics, kinetics and economic parameters was obtained. The results of calculations were describes and discussed.

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