Author(s):
1. Branko Pejović, Faculty of Technology - University of East Sarajevo, Republic of Srpska, Bosnia and Herzegovina
2. Duško Kostić, Faculty of Technology - University of East Sarajevo, Republic of Srpska, Bosnia and Herzegovina
3. Mitar Perušić, Faculty of Technology - University of East Sarajevo, Republic of Srpska, Bosnia and Herzegovina
4. Zoran Obrenovic, Faculty of Technology - University of East Sarajevo, Republic of Srpska, Bosnia and Herzegovina
5. Vladimir Damjanović, Fabrika , Republic of Srpska, Bosnia and Herzegovina

Abstract:
In paper it is analyzed in details and given graphically solution of this complex problem, based on relation for exergy ie maximal technical work in open thermodynamics systems. Based on this analysis for more complete view and better looking at the process, general model for graphical interpretation of exergy in p-v, h-s, and T-s diagrams is obtained, which is at the same time the most important both for theory and for practice. Model covers four characteristic cases depending on ratio of initial and final parameters of pressure and temperature. Representation in work p-v diagram is derived from definition itself of technical work, while representation in T-s diagram is obtained from definition of exergy. In both cases, equivalent areas are defined. Representation of exergy in h-s diagram is obtained over the appropriate lines, using slope of tangent on characteristic isobara. The goal of the paper is systematization of characteristic cases of exergy of open systems in general thermodynamics diagrams in one example based on which other similar cases will be solving. Considering that this problem is not solved and analyzed in details in literature. Proposed general graphic models can be effectively used for solving and analysis of many practical and theoretical problems in exergy area.

Key words:
Maximal technical work,open systems,thermodynamics analysis,graphical methods,graphical representation

Thematic field:
SYMPOSIUM A - Science of matter, condensed matter and physics of solid states

Date of abstract submission:
27.06.2019.

Conference:
Contemporary Materials 2019 - Savremeni Materijali

Abstract