The influence of furnace wall emissivity on steel charge heating

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F16%3A43928570" target="_blank" >RIV/49777513:23640/16:43928570 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.infrared.2015.12.001" target="_blank" >http://dx.doi.org/10.1016/j.infrared.2015.12.001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.infrared.2015.12.001" target="_blank" >10.1016/j.infrared.2015.12.001</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The influence of furnace wall emissivity on steel charge heating

Popis výsledku v původním jazyce

Radiation heat transfer is one of the most important heat transfer modes in high-temperature applications. It is a strongly non-linear process, which depends on the temperature and emissivity of heat exchange surfaces, their geometrical configuration and properties of the surrounding atmosphere. Heat exchange intensity between the surfaces depends mainly on their temperature differences. However, their emissivities influence significantly the radiation heat transfer process as well. Emissivity is a function of surface state or atmospheric chemical reactions, temperature and wavelengths. Because of these non-linearities, it is very complicated to evaluate such a real problem by numerical simulation, and experimental work seems to be the most reliable evaluation procedure. We applied special hightemperature coatings of different emissivities on furnace walls to evaluate the dependence between the furnace wall emissivity and steel charge heating. The emissivity analyses of the coatings used and emissivity measurement results in dependence on wavelength are presented in this paper. The dependence of the charge heating on the furnace wall emissivity, the importance of emissivity wavelength dependence and significant differences of the emissivity effect in electrical and gas heated furnaces are shown. The possible consequences and practical benefits are also discussed in this paper.

Název v anglickém jazyce

The influence of furnace wall emissivity on steel charge heating

Popis výsledku anglicky

Radiation heat transfer is one of the most important heat transfer modes in high-temperature applications. It is a strongly non-linear process, which depends on the temperature and emissivity of heat exchange surfaces, their geometrical configuration and properties of the surrounding atmosphere. Heat exchange intensity between the surfaces depends mainly on their temperature differences. However, their emissivities influence significantly the radiation heat transfer process as well. Emissivity is a function of surface state or atmospheric chemical reactions, temperature and wavelengths. Because of these non-linearities, it is very complicated to evaluate such a real problem by numerical simulation, and experimental work seems to be the most reliable evaluation procedure. We applied special hightemperature coatings of different emissivities on furnace walls to evaluate the dependence between the furnace wall emissivity and steel charge heating. The emissivity analyses of the coatings used and emissivity measurement results in dependence on wavelength are presented in this paper. The dependence of the charge heating on the furnace wall emissivity, the importance of emissivity wavelength dependence and significant differences of the emissivity effect in electrical and gas heated furnaces are shown. The possible consequences and practical benefits are also discussed in this paper.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JP - Průmyslové procesy a zpracování

OECD FORD obor

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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

2016

Kód důvěrnosti údajů

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

Název periodika

INFRARED PHYSICS &amp; TECHNOLOGY

ISSN

1350-4495

e-ISSN

—

Svazek periodika

74

Číslo periodika v rámci svazku

leden 2016

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

63-71

Kód UT WoS článku

000370091600009

EID výsledku v databázi Scopus

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