Exergy in technological substance exchange processes

Abstract

The exergy concept applied to technological substance exchange processes has been presented and discussed in detail. The special behavior of the thermal and substantial parts of exergy flows has been taken into account in analyzing simple drying/wetting and CO2–absorption/desorption processes. In the exergy analysis of drying certain practical simplifications and approximations have been introduced, which can be advantageous for the mechanical engineer in preparing project brief foredesign. CO2–absorption processes are important for the so–called CCS new power technologies, especially the post–combustion ones. All the analyzes presented focus on the thermodynamic effectivity, which can be used in exergy rating of complex systems independent on their structure.