The correlation based zonal method and its application to the back pass channel of oxy/air-fired CFB boiler

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The correlation based zonal method and its application to the back pass channel of oxy/air-fired CFB boiler. / Bordbar, Mohammad Hadi; Hyppänen, Timo.

In: Applied Thermal Engineering, Vol. 78, 05.03.2015, p. 351-363.

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@article{23f0906883f7496e98fb00bd948a0f3e,
title = "The correlation based zonal method and its application to the back pass channel of oxy/air-fired CFB boiler",
abstract = "A set of correlations for direct exchange area (DEA) between zones are presented. The correlations are simpler and much faster than the classical method used for DEA calculations in zone method. Additionally a unique form of correlation supports both singular and non-singular DEA calculation and no extra effort for non-singular cases is needed. Using the new correlations, the correlation based zone method (CBZM) is introduced and validated by several benchmarks. The CBZM results were in excellent agreement with the benchmark solutions. As an application case, by using the CZBM the gray and non-gray radiative heat transfer has been analyzed in a large back pass channel of a CFB boiler for the case of air and oxygen-fired combustion scenarios. The effect of the spectral radiative behavior of combustion gases on the predicted radiative heat fluxes on the walls is addressed. The effect of combustion scenario on the operation of the unit is also discussed.",
keywords = "Circulating fluidized bed, Correlation based zone method (CBZM), Direct exchange area, Non-gray gas modeling, Numerical modeling, Oxygen fired combustion, Radiative zone method",
author = "Bordbar, {Mohammad Hadi} and Timo Hypp{\"a}nen",
year = "2015",
month = "3",
day = "5",
doi = "10.1016/j.applthermaleng.2014.12.046",
language = "English",
volume = "78",
pages = "351--363",
journal = "Applied Thermal Engineering",
issn = "1359-4311",

}

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TY - JOUR

T1 - The correlation based zonal method and its application to the back pass channel of oxy/air-fired CFB boiler

AU - Bordbar, Mohammad Hadi

AU - Hyppänen, Timo

PY - 2015/3/5

Y1 - 2015/3/5

N2 - A set of correlations for direct exchange area (DEA) between zones are presented. The correlations are simpler and much faster than the classical method used for DEA calculations in zone method. Additionally a unique form of correlation supports both singular and non-singular DEA calculation and no extra effort for non-singular cases is needed. Using the new correlations, the correlation based zone method (CBZM) is introduced and validated by several benchmarks. The CBZM results were in excellent agreement with the benchmark solutions. As an application case, by using the CZBM the gray and non-gray radiative heat transfer has been analyzed in a large back pass channel of a CFB boiler for the case of air and oxygen-fired combustion scenarios. The effect of the spectral radiative behavior of combustion gases on the predicted radiative heat fluxes on the walls is addressed. The effect of combustion scenario on the operation of the unit is also discussed.

AB - A set of correlations for direct exchange area (DEA) between zones are presented. The correlations are simpler and much faster than the classical method used for DEA calculations in zone method. Additionally a unique form of correlation supports both singular and non-singular DEA calculation and no extra effort for non-singular cases is needed. Using the new correlations, the correlation based zone method (CBZM) is introduced and validated by several benchmarks. The CBZM results were in excellent agreement with the benchmark solutions. As an application case, by using the CZBM the gray and non-gray radiative heat transfer has been analyzed in a large back pass channel of a CFB boiler for the case of air and oxygen-fired combustion scenarios. The effect of the spectral radiative behavior of combustion gases on the predicted radiative heat fluxes on the walls is addressed. The effect of combustion scenario on the operation of the unit is also discussed.

KW - Circulating fluidized bed

KW - Correlation based zone method (CBZM)

KW - Direct exchange area

KW - Non-gray gas modeling

KW - Numerical modeling

KW - Oxygen fired combustion

KW - Radiative zone method

UR - http://www.scopus.com/inward/record.url?scp=84921334108&partnerID=8YFLogxK

U2 - 10.1016/j.applthermaleng.2014.12.046

DO - 10.1016/j.applthermaleng.2014.12.046

M3 - Article

VL - 78

SP - 351

EP - 363

JO - Applied Thermal Engineering

JF - Applied Thermal Engineering

SN - 1359-4311

ER -

ID: 17994607