Evaluation of combustion models for determination of refinery furnaces efficiency

The efficiency of combustion in furnaces is the measure of heat released in the flame absorbed by the fluid to be heated and is considered one of the most important variables when conducting studies on processes that occur in continuous process industries. The furnace efficiency is calculated using...

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Autores principales:	Cala,O. M, Merino,L, Kafarov,V, Saavedra,J
Lenguaje:	English
Publicado:	Universidad de Tarapacá. 2015
Materias:	Efficiency refinery gas combustion furnaces fuel gas
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-33052015000300012
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spelling	oai:scielo:S0718-330520150003000122015-08-19Evaluation of combustion models for determination of refinery furnaces efficiencyCala,O. MMerino,LKafarov,VSaavedra,J Efficiency refinery gas combustion furnaces fuel gas The efficiency of combustion in furnaces is the measure of heat released in the flame absorbed by the fluid to be heated and is considered one of the most important variables when conducting studies on processes that occur in continuous process industries. The furnace efficiency is calculated using various mathematical models proposed in the literature; these models vary in complexity depending on the analyzed variables. The models I and II are based on the amount of energy absorbed by the furnace using the heating value, the model III contains variables such as air excess, stack gas temperature and adiabatic flame temperature, meanwhile the model IV contains heating losses in furnace's wall (2%), the stack gas temperature and excess air. In this paper was used computer simulation to evaluate fuel gas mixtures with Lower Heating Values (LHV) between 800 to 2500 Btu/ft³, and they were compared with natural gas and data process; the results show that the combustion characteristics might change by varying the fuel composition. It was also found decreased combustion efficiency due to high hydrogen concentration; on the other hand the adiabatic flame temperature was increased in function of gas composition. Model IV presented in this research allowed evaluating combustion process efficiency using only two variables: stack gas temperature and the excess air.info:eu-repo/semantics/openAccessUniversidad de Tarapacá.Ingeniare. Revista chilena de ingeniería v.23 n.3 20152015-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-33052015000300012en10.4067/S0718-33052015000300012
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Efficiency refinery gas combustion furnaces fuel gas
spellingShingle	Efficiency refinery gas combustion furnaces fuel gas Cala,O. M Merino,L Kafarov,V Saavedra,J Evaluation of combustion models for determination of refinery furnaces efficiency
description	The efficiency of combustion in furnaces is the measure of heat released in the flame absorbed by the fluid to be heated and is considered one of the most important variables when conducting studies on processes that occur in continuous process industries. The furnace efficiency is calculated using various mathematical models proposed in the literature; these models vary in complexity depending on the analyzed variables. The models I and II are based on the amount of energy absorbed by the furnace using the heating value, the model III contains variables such as air excess, stack gas temperature and adiabatic flame temperature, meanwhile the model IV contains heating losses in furnace's wall (2%), the stack gas temperature and excess air. In this paper was used computer simulation to evaluate fuel gas mixtures with Lower Heating Values (LHV) between 800 to 2500 Btu/ft³, and they were compared with natural gas and data process; the results show that the combustion characteristics might change by varying the fuel composition. It was also found decreased combustion efficiency due to high hydrogen concentration; on the other hand the adiabatic flame temperature was increased in function of gas composition. Model IV presented in this research allowed evaluating combustion process efficiency using only two variables: stack gas temperature and the excess air.
author	Cala,O. M Merino,L Kafarov,V Saavedra,J
author_facet	Cala,O. M Merino,L Kafarov,V Saavedra,J
author_sort	Cala,O. M
title	Evaluation of combustion models for determination of refinery furnaces efficiency
title_short	Evaluation of combustion models for determination of refinery furnaces efficiency
title_full	Evaluation of combustion models for determination of refinery furnaces efficiency
title_fullStr	Evaluation of combustion models for determination of refinery furnaces efficiency
title_full_unstemmed	Evaluation of combustion models for determination of refinery furnaces efficiency
title_sort	evaluation of combustion models for determination of refinery furnaces efficiency
publisher	Universidad de Tarapacá.
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-33052015000300012
work_keys_str_mv	AT calaom evaluationofcombustionmodelsfordeterminationofrefineryfurnacesefficiency AT merinol evaluationofcombustionmodelsfordeterminationofrefineryfurnacesefficiency AT kafarovv evaluationofcombustionmodelsfordeterminationofrefineryfurnacesefficiency AT saavedraj evaluationofcombustionmodelsfordeterminationofrefineryfurnacesefficiency
_version_	1714203425457045504

Evaluation of combustion models for determination of refinery furnaces efficiency

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