Thermal economic analysis for a power unit with waste heat utilization

LI Huijun; GU Kaina; MA Chao

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Thermal economic analysis for a power unit with waste heat utilization

更新时间：2025-09-28

- Thermal economic analysis for a power unit with waste heat utilization
- Thermal Power Generation Vol. 43, Issue 1, Pages: 6-10(2014)
- 作者机构：
  
  华北电力大学能源动力与机械工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621
- Published：2014
- 稿件说明：
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LI Huijun, GU Kaina, MA Chao. Thermal economic analysis for a power unit with waste heat utilization[J]. Thermal power generation, 2014, 43(1): 6-10.
DOI：

LI Huijun, GU Kaina, MA Chao. Thermal economic analysis for a power unit with waste heat utilization[J]. Thermal power generation, 2014, 43(1): 6-10. DOI：

摘要

以350MW机组循环流化床(CFB)锅炉排渣余热为余热发电的热源

建立了有机朗肯循环(ORC)余热发电模型

提出了3种余热发电方案

以R141b、R123 2种工质为例

在2种工况下对各方案进行了热经济性计算分析。结果表明:利用ORC余热发电机组的热经济性优于余热加热凝结水的机组;方案2的热经济性最佳;在相同的机组背压下

工质初参数越高

机组热经济性越好;工质R141b的机组热经济性优于工质R123的机组热经济性。

Abstract

In order to make full use of waste heat in power plants

the slag waste heat from a CJK 350MW unit circulating fluidized bed boiler was taken as heat source to establish an organic Rankine cycle(ORC)waste heat power generation model.Three schemes for waste heat power generation were proposed.By taking the working fluid R141band R123as the examples

the thermal economic analysis for each scheme was performed.The results show that

the unit with the ORC waste heat power generation has higher economical efficiency than that of the one using waste heat to heat the condensate water;scheme II has the highest economic efficiency;the unit thermal economical efficiency increased with initial parameters of the working fluid on the premise of a constant back pressure;the unit using R141bas the working fluid had a higher economical efficiency than that using R123.

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