Abstract
Comparisons between the mesh screen, parallel wire, etched foil and sphere beds regenerators have been made base on the calculation of entropy generation rate per unit length in the four irreversible processes. The irreversible process model of heat conduction of gas and matrix, gas flow resistance and heat exchange between gas and matrix are respectively analyzed. Based on the software Regen3.3 user manual, the entropy generation rate per unit length are calculated and compared between the four regenerators. It is indicated that the irreversible processes loss in the cold end plays the key role in the whole regenerator, and it is an important way to improve the regeneration efficient by optimizing the matrix geometries and the material properties at the cold end.
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