Pitfalls of Exergy Analysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F17%3A43931859" target="_blank" >RIV/49777513:23640/17:43931859 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/17:43913850 RIV/00216208:11320/17:10360973

Výsledek na webu

<a href="http://dx.doi.org/10.1515/jnet-2016-0043" target="_blank" >http://dx.doi.org/10.1515/jnet-2016-0043</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1515/jnet-2016-0043" target="_blank" >10.1515/jnet-2016-0043</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Pitfalls of Exergy Analysis

Popis výsledku v původním jazyce

The well-known Gouy–Stodola theorem states that a device produces maximum useful power when working reversibly, that is with no entropy production inside the device. This statement then leads to a method of thermodynamic optimization based on entropy production minimization. Exergy destruction (difference between exergy of fuel and exhausts) is also given by entropy production inside the device. Therefore, assessing efficiency of a device by exergy analysis is also based on the Gouy–Stodola theorem. However, assumptions that had led to the Gouy–Stodola theorem are not satisfied in several optimization scenarios, e.g. non-isothermal steady-state fuel cells, where both entropy production minimization and exergy analysis should be used with caution. We demonstrate, using non-equilibrium thermodynamics, a few cases where entropy production minimization and exergy analysis should not be applied.

Název v anglickém jazyce

Pitfalls of Exergy Analysis

Popis výsledku anglicky

The well-known Gouy–Stodola theorem states that a device produces maximum useful power when working reversibly, that is with no entropy production inside the device. This statement then leads to a method of thermodynamic optimization based on entropy production minimization. Exergy destruction (difference between exergy of fuel and exhausts) is also given by entropy production inside the device. Therefore, assessing efficiency of a device by exergy analysis is also based on the Gouy–Stodola theorem. However, assumptions that had led to the Gouy–Stodola theorem are not satisfied in several optimization scenarios, e.g. non-isothermal steady-state fuel cells, where both entropy production minimization and exergy analysis should be used with caution. We demonstrate, using non-equilibrium thermodynamics, a few cases where entropy production minimization and exergy analysis should not be applied.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Non-Equilibrium Thermodynamics

ISSN

0340-0204

e-ISSN

—

Svazek periodika

42

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

16

Strana od-do

201-216

Kód UT WoS článku

000398971100006

EID výsledku v databázi Scopus

2-s2.0-85016820743