Exergy efficiency of the pulverized coal boiler with O2/CO2combustion and O2/N2 combustion

XIAO Zhuonan

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Exergy efficiency of the pulverized coal boiler with O₂/CO₂combustion and O₂/N₂ combustion

Thermal Power Generation Vol. 42, Issue 11, Pages: 1-5(2013)

更新时间：2025-09-28

- Exergy efficiency of the pulverized coal boiler with O₂/CO₂combustion and O₂/N₂ combustion
- 作者机构：
  
  内蒙古科技大学能源与环境学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK221
- Published：2013
- 稿件说明：
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XIAO Zhuonan. Exergy efficiency of the pulverized coal boiler with O₂/CO₂combustion and O₂/N₂ combustion[J]. Thermal Power Generation, 2013, 42(11): 1-5.
DOI：

XIAO Zhuonan. Exergy efficiency of the pulverized coal boiler with O₂/CO₂combustion and O₂/N₂ combustion[J]. Thermal Power Generation, 2013, 42(11): 1-5. DOI：

摘要

结合热力学第一定律和第二定律

根据Ex的定义及计算方法

建立了适用于O2/CO2气氛煤粉锅炉的Ex效率计算模型。以400t/h煤粉锅炉为研究对象

分别计算并比较了常规空气及φ(O2)∶φ(CO2)=3∶7气氛下煤粉锅炉的各项Ex损失、锅炉Ex效率以及锅炉热效率。结果表明:O2/CO2燃烧方式可提高锅炉的热效率和Ex效率

但是无论何种气氛

Ex效率均远远低于热效率

即能量的评估不仅要考虑量

还要考虑质。通过对O2/CO2燃烧方式锅炉的Ex效率计算分析揭示了能量的质与量的可利用程度及主要损失项。

Abstract

According to the definition and computational method of exergy

the first and second laws of thermodynamics

an exergy efficiency calculation model for pulverized coal boiler under O2/CO2atmosphere was established.Taking a 400t/h pulverized coal boiler as the example

the exergy loss

boiler exergy efficiency and boiler thermal efficiency were calculated

in conventional air atmosphere and oxyfuel atmosphere with O2and CO2volume ratio of 3to 7.The results showed that

the O2/CO2combustion technology can enhance the boiler efficiency

but no matter what kind of the atmosphere

the exergy efficiency was far below the thermal efficiency

namely energy assessment should consider not only the quantity

but also the quality.The boiler exergy efficiency calculation revealed the energy utilization degree in quality and quantity

which also indicated the major loss.

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