Influence of Structural Parameters on the Summer Operational Characteristics of a Three-Tower-in-One Indirect Air-Cooling System

MENG Yanqing; ZHAO Qiangqiang; FAN Ye; ZHU Min; JIA Dawei; HUANG Hancheng; DU Xiannan; HAN Li; SHI Jianjun; ZOU Yang; SHI Jinwen

doi:10.7652/xjtuxb202607005

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Influence of Structural Parameters on the Summer Operational Characteristics of a Three-Tower-in-One Indirect Air-Cooling System

Special Topic Cooling Characteristics | 更新时间：2026-07-09

- Influence of Structural Parameters on the Summer Operational Characteristics of a Three-Tower-in-One Indirect Air-Cooling System
- Journal of Xi'an Jiaotong University Vol. 60, Issue 7, Pages: 46-56(2026)
- 作者机构：
  
  中煤伊犁能源开发有限公司，835000，新疆伊犁
  西安交通大学动力工程多相流国家重点实验室，710049，西安
  高效灵活煤电及碳捕集利用封存全国重点实验室，710054，西安
  西安热工研究院有限公司，710054，西安
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202607005
  CLC： TK121
- Received：29 September 2025，
  
  Published：10 July 2026
- 稿件说明：
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MENG Yanqing, ZHAO Qiangqiang, FAN Ye, et al. Influence of Structural Parameters on the Summer Operational Characteristics of a Three-Tower-in-One Indirect Air-Cooling System[J]. Journal of Xi'an Jiaotong University, 2026, 60(7): 46-56.
DOI：

MENG Yanqing, ZHAO Qiangqiang, FAN Ye, et al. Influence of Structural Parameters on the Summer Operational Characteristics of a Three-Tower-in-One Indirect Air-Cooling System[J]. Journal of Xi'an Jiaotong University, 2026, 60(7): 46-56. DOI： 10.7652/xjtuxb202607005.

摘要

为了揭示三塔合一间接空冷系统结构参数对系统夏季运行特性的影响规律，基于夏季汽机额定负载工况，利用商业计算软件和互联网通信协议，建立了三塔合一间接空冷系统的耦合计算模型，验证了系统仿真模型的准确性。利用本文模型，定量分析了塔身高度、进风口直径、排烟高度和烟囱直径等关键结构参数的变化对系统运行性能的影响。结果表明：塔身高度和进风口直径的增加能显著降低机组背压，当塔身高度从190 m增至206 m时，机组背压降低了0.73 kPa。当进风口直径从126 m增加至138 m时，机组背压降低了2.04 kPa。排烟高度对机组背压的影响较小，在工程实际中可忽略，烟囱直径从6.5 m增加到10.5 m时，机组背压增加了0.37 kPa，增加趋势随着烟囱直径增大逐渐平缓，烟囱面积越大对机组背压所产生的影响越小。综合考虑投资成本和运行效益，建议塔身高度和进风口直径应适当增大，而烟囱直径应适当减小。研究结果可为三塔合一间接空冷系统的结构优化和机组经济性提升提供理论依据。

Abstract

To elucidate how the structural parameters of the three-tower-in-one indirect air-cooling system influence its operational characteristics in summer，a coupled calculation model for the system was established under the turbine rated load condition in summer，using commercial simulation software and Internet communication protocols.The accuracy of the system's simulation model was verified，and the impacts of key structural parameters—including tower height，air inlet diameter，flue gas exhaust height，and chimney diameter—on the system's operational performance were quantitatively analyzed.The results demonstrate that，as the tower height and air inlet diameter increase，the unit back pressure significantly drops.Specifically，as the tower height increases from 190 m to 206 m，the unit back pressure is reduced by 0.73 kPa；as the air inlet diameter increases from 126 m to 138 m，the unit back pressure decreases by 2.04 kPa.The influence of flue gas exhaust height on the unit back pressure was found to be minimal，so much so that it is negligible in engineering practice.When the chimney diameter is increased from 6.5 m to 10.5 m，the unit back pressure increases by 0.37 kPa.The increase in back pressure gradually levels off as chimney diameter grows，indicating a diminishing impact of chimney area on unit back pressure. Considering both investment costs and operational benefits，it is recommended that the tower height and air inlet diameter should be moderately increased，while the chimney diameter should be slightly decreased.These findings provide a theoretical basis for the structural optimization and improved unit economics of three-tower-in-one indirect air-cooling systems.

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references

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