Abstract

Abstract The heat transfer efficiency of continuous reforming unit (CRR) is studied based on entropy analysis and entransy analysis. By calculating the entropy change and entransy of cold and hot streams, the transfer efficiency of entropy and entransy is obtained respectively. When the minimum temperature difference increases, the entropy transfer efficiency increases. It appears contrary to the principle of minimum entropy generation. When the minimum temperature difference increases, the entransy transfer efficiency decreases. It is proved that the greater the temperature difference, the lower the heat transfer ability. The theory of entransy can avoid the violation of the minimum principle of entropy production. Thus, compared with the entropy analysis, the entransy analysis has obvious advantages in analyzing the heat transfer efficiency of the CRR unit.

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