Browsing by Subject "exergy"

Now showing 1 - 3 of 3

Access status: Open Access ,
Exergetische Betrachtung einer Gasturbinenschaltung als eines verallgemeinerten energetischen Systems
(Wydawnictwa AGH, 2006) Kozaczka, Jarosław
Detailed method of modeling has been presented, which is aimed for thermodynamic analyzes and rating of power systems. As an example the gas turbine scheme with heat recovery was discussed. The gas fuel is methane and hydrogen, treated as perfect gases. The numerical calculations based on the derivations and algorithms have been given, which were presented in author's farmer papers. The described method can be applied to the more complicated power structures, especially to systems with CO2-poor combustion processes.
Access status: Open Access ,
The use of coal in a theoretical gas turbine
(Wydawnictwa AGH, 2007) Kozaczka, Jarosław
In the paper has been presented the application of the on thermodynamic analyzes and ratings oriented modeling method of power systems. Simple combustion reaction with equilibrium on the products side was taken into account. Furthermore the modeling method of simple chemical reactions has been introduced, which is based on the so-called reaction intensity coefficient, analogous to the heat exchange process intensity in a membran apparatus. The presented discussion is an introductory investigation of the modeling of systems for the so-called clean solid fuels combustion systems, where additionally gasifying and absorption of carbon mono- and carbon dioxide are to be analyzed.
Access status: Open Access ,
Zu dem Energiebegriff
(Wydawnictwa AGH, 2005) Kozaczka, Jarosław
In the contribution three main standpoints to the energy concept definition have been presented. Besides the skeptical one, two important ways of defining energy can be distinguished: the one specific for physicists, and the second for thermodynamicians. For the first group the kind of the work, which appears in the energy concept definition, is fully trivial, but for the second group it is of the decisive importance. In the contribution the second standpoint will be motivated, in particular the need of taking into account the quality of particular energy kinds, e.g. of the work, as an energy interaction. Every energy and energy interaction consists of its exergy and anergy. And just the exergy, which describes not only quantity, but also the energy quality, is the main parameter for the power engineer, and hence should be taken into account in thermodynamic analyses. That is why every energy concept definition, which does not take account of the work quality, is not motivated in the thermodynamics at all.