Thermal performance of a new coal-fired power generation system based on organic Rankine cycle

张俊莲; 杨传燕; 张雪标

doi:10.19666/j.rlfd.202410220

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Thermal performance of a new coal-fired power generation system based on organic Rankine cycle

Thermal Power Generation Vol. 54, Issue 7, Pages: 144-152(2025)

更新时间：2026-08-11

- Thermal performance of a new coal-fired power generation system based on organic Rankine cycle
- 作者机构：
  
  成都工贸职业技术学院(成都市技师学院)电气工程学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202410220
  CLC： TM621
- Published：2025
- 稿件说明：
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[1]张俊莲,杨传燕,张雪标.基于有机朗肯循环的新型燃煤发电系统热力性能[J],2025,54(07):144-152.
[1]张俊莲,杨传燕,张雪标.基于有机朗肯循环的新型燃煤发电系统热力性能[J],2025,54(07):144-152. DOI： 10.19666/j.rlfd.202410220.

DOI：10.19666/j.rlfd.202410220.

摘要

为实现蒸汽能量的梯级利用，提高蒸汽发电能力，提出了一种集成有机朗肯循环系统与风冷式燃煤发电系统的新型发电系统。该系统基于有机朗肯循环系统在中低温阶段的热电高效转换特性，抽取燃煤机组中膨胀到一定程度的蒸汽驱动有机朗肯循环系统进一步提高输出功率。该耦合方案可以实现燃煤电厂提高输出功率、回收排汽余热和在冬季防止空冷器结冰的多重目的。针对某600 MW燃煤电厂进行了热力学性能分析，结果显示，当抽汽流量为160 kg/s时，系统在50%THA、75%THA和100%THA负荷下的热效率分别提高了3.48百分点、1.72百分点和1.08百分点，烟效率分别提高了3.38百分点、1.68百分点和1.05百分点，煤耗率分别降低了27.72、12.88、7.92 g/(kW·h)，余热回收率达到64.57%、25.64%和15.40%。该方案不仅提升了现有风冷式燃煤电厂的性能，而且降低了煤耗，研究成果为提高电厂整体性能提供了新的思路。

Abstract

A novel power generation system integrating an organic Rankine cycle(ORC) with an air-cooled coal-fired power plant is proposed to achieve cascaded utilization of steam energy and enhance output power capability. Based on the efficient thermoelectric conversion characteristics of the ORC system at low and medium temperatures

the steam expanding to a certain level in the coal-fired unit is extracted to drive the ORC system for higher output power. This coupling scheme can achieve the multiple purposes of increasing output power

recovering exhaust steam waste heat and preventing air cooler icing in winter. Focusing on a 600 MW coal-fired power plant

thermodynamic performance evaluation has been carried out. The results show that

when the extraction flow rate is 160 kg/s

the thermal efficiency of the system at 50% THA

75% THA and 100% THA loads increases by 3.48

1.72 and 1.08 percentage points

respectively. The exergy efficiency increases by 3.38

1.68 and 1.05 percentage points

and the coal consumption rate decreases by 27.72

12.88 and 7.92 g/(kW·h)

respectively. The heat recovery rate reaches 64.57%

25.64% and 15.40%

respectively. This approach not only improves the performance of existing air-cooled coal-fired power plants

but also reduces coal consumption

and the research results can provide a way to improve the overall performance of power plants.

关键词

Keywords

references

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