Szczegóły publikacji
Opis bibliograficzny
Application of orthogonal least squares method in exergy analysis of technological processes / Bożena BORYCZKO, Adam HOŁDA, Michał DUDEK, Zygmunt KOLENDA // W: ECOS 2019 [Dokument elektroniczny] : proceedings of the 32nd international conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems : Wrocław, Poland, 23–28 June 2019 / ed. by Wojciech Stanek, [et al.]. — Wersja do Windows. — Dane tekstowe. — [Gliwice] : Institute of Thermal Technology. Silesian University of Technology, 2019. — Dysk Flash. — e-ISBN: 978-83-61506-51-5. — S. 517–525. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 524–525, Abstr.
Autorzy (4)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 122746 |
|---|---|
| Data dodania do BaDAP | 2019-07-17 |
| Rok publikacji | 2019 |
| Typ publikacji | materiały konferencyjne (aut.) |
| Otwarty dostęp |  |
| Wydawca | Politechnika Śląska |
Abstract
One of the main tasks of exergy analysis of real physical and chemical processes is to detect quantify and calculate exergy losses which occur as the results of thermodynamic imperfection or irreversibilities of every process taking place inside the system. Exergy does not satisfy the law of conservation so the exergy balance is always closed by internal exergy losses which are directly proportional to the entropy generation rate. Exergy balance equation contains directly measurable variables which characterize the mass flow rates. the chemical compositions and specific exergy of substances and products calculated from material and energy balance equations (laws of conservation of mass and energy). These laws - when applied to the principal chemical elements lead to the system of nonlinear algebraic equations. Usually, the number of balance equations is greater than number of unknowns (not directly measured quantities) and because of inevitable errors of measurements the system of equations is not exactly satisfied. The measured variables must be corrected to satisfy the required equations. Such a correction is called adjustment (or reconciliation) of material mass and energy balances. It is obvious that exergy balance equations to be reliable must be based on the adjusted mass and energy balances. Neglecting can lead to the incorrect values of exergy losses both internal and external. Thus, the general task of the paper is the analysis of the influence of the measurement results (mass flow rates, chemical composition) on the accuracy of exergy losses calculation. It results from the general requirement of minimization of exergy losses or maximization of thermodynamic efficiency of the process. © ECOS 2019 - Proceedings of the 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems. All rights reserved.