Analysis and Calculation on Radiative Heat Transfer of Flue Gas at High Pressure and Carbon Dioxide Concentration

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Analysis and Calculation on Radiative Heat Transfer of Flue Gas at High Pressure and Carbon Dioxide Concentration

更新时间：2025-05-08

- Analysis and Calculation on Radiative Heat Transfer of Flue Gas at High Pressure and Carbon Dioxide Concentration
- Vol. 45, Issue 5, Pages: 17-22+126(2011)
- 作者机构：
  
  华北电力大学能源动力与机械工程学院,河北,保定,071003
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK224.1
- Online First：10 May 2011，
  
  Published：2011
- 稿件说明：
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Analysis and Calculation on Radiative Heat Transfer of Flue Gas at High Pressure and Carbon Dioxide Concentration[J]. 2011, 45(5): 17-22+126.
DOI：

Analysis and Calculation on Radiative Heat Transfer of Flue Gas at High Pressure and Carbon Dioxide Concentration[J]. 2011, 45(5): 17-22+126. DOI：

摘要

针对高压O

/CO

燃烧方式下高浓度CO

和水蒸气混合气体烟气的辐射换热问题

建立了一种新的宽带关联k分布模型.为了验证模型的有效性

以O

/CO

燃烧方式下炉内CO

和水蒸气生成状况为例

采用该模型与离散坐标法相结合的方法计算了不同温度(1 000～2 500 K)和压力(0.1～1.5 MPa)下一维无限大平行平板间混合气体的辐射强度和CO

4.3 μm谱带累积分布函数

并与逐线计算、全光谱关联k分布模型和基于指数的宽带关联k模型的计算结果进行了比较.结果表明:随着压力的增加

所提出的宽带关联k分布模型与逐线计算的结果吻合较好

与文献报导的两个模型相比

不仅计算精度有所提高

而且对混合气体的处理更加简便灵活

因此更适于高压下烟气辐射特性的计算.

Abstract

A new wide band correlated-k distribution model was proposed to calculate the radiative heat transfer of the water vapor and carbon dioxide gas mixture at high pressure and concentration under pressurized O

/CO

combustion mode. The radiation intensity and carbon dioxide 4.3 μm band cumulative distribution function between two cold and black parallel plates were calculated to verify the present model by combination of the present model and the discrete ordinate method at 1 000-2 500 K and 0.1-1.5 MPa in the furnace of a coal-fired boiler. The comparison shows that the results from the present model are more reasonably consistent with those by the line-by-line method with an increase in pressure. Moreover

the acc

uracy of the present model is higher than that of the full-spectrum correlated-k distribution model or the wide band correlated-k distribution model based on the exponent in literature. It seems that this new wide band correlated-k model is suitable to the radiative heat transfer of flue gas at high pressure.

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references

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