New correlations for the weighted-sum-of-gray-gases model in oxy-fuel conditions based on HITEMP 2010 database

被引：136

作者：

Kangwanpongpan, Tanin ^{[1
]}

Franca, Francis H. R. ^{[2
]}

da Silva, Rodrigo Correa ^{[1
]}

Schneider, Paulo Smith ^{[2
]}

Krautz, Hans Joachim ^{[1
]}

机构：

[1] Brandenburg Tech Univ Cottbus, Chair Power Plant Technol, Cottbus, Germany

[2] Univ Fed Rio Grande do Sul, Dept Mech Engn, Porto Alegre, RS, Brazil

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2012年 / 55卷 / 25-26期

关键词：

Radiation modeling; Oxy-fuel; Weighted-sum-of-gray-gases model; HITEMP; 2010; MOLECULAR SPECTROSCOPIC DATABASE; INTERNAL PARTITION SUMS; COAL COMBUSTION; HIGH-TEMPERATURE; RADIATION; TECHNOLOGY; ATMOSPHERE; EDITION; FLAMES; AIR;

D O I：

10.1016/j.ijheatmasstransfer.2012.07.032

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Oxy-fuel combustion is one of the promising options for carbon dioxide capture in future coal power plants. Radiative properties of combustion gases and heat transfer characteristics inside oxy-fuel furnaces are different from those found in air-fired furnace. Nowadays, few publications provide appropriate radiation property correlations for oxy-fuel conditions. The available correlations are based on previous versions of HITRAN database, which is not accurate for prediction of spectral intensities at high temperature in combustion applications or above 1000 K. This paper considers the determination and evaluation of new correlations for the weighted-sum-of-gray-gases model to predict the radiative transfer in gases under oxy-fuel conditions. The new correlations are fitted from emittance charts calculated from the up-to-date HITEMP 2010 database for molar ratios of water vapor to carbon dioxide between 0.125 and 4, temperature range of 400-2500 K, and pressure path-length varying from 0.001 to 60 bar m. The new correlations are validated by comparing the radiative source term with line-by-line calculations from HITEMP 2010 database for a one-dimensional slab system. The radiative transfer equation is solved with the discrete ordinate method. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：7419 / 7433

页数：15

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