Range of Porosity in Typical Regenerators for an Appropriate Balance Between Heat Exchange and Pressure Drop

Heat transfer analysis in a rotary regenerator is performed. The matrix porosity of the exchanger directly influences the amount of heat transfer between the circulating gases in the equipment and the matrix plates. From the pre-established flow rate values in the regenerator, the total heat transfer and the pressure drop are calculated for different matrix porosity values. The heat transfer coefficient in the equipment and the friction factor are obtained from correlations. The total heat transfer is obtained using the Effectiveness-NTU method specific to rotary regenerators. A computer program is developed for the simulation of typical rotary regenerators. The results show that there is a range of matrix porosity values in which there is a good relationship between the total heat transfer and the pressure drop in the equipment.

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