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首页> 外文期刊>International Journal of Heat and Mass Transfer >Entransy based optimal adjustment of louvers for anti-freezing of natural draft dry cooling system
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Entransy based optimal adjustment of louvers for anti-freezing of natural draft dry cooling system

机译：基于通风的百叶窗最佳调节，以防自然通风的干式冷却系统冻结

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摘要

Natural draft dry cooling tower (NDDCT) is susceptibly affected by ambient conditions, especially environmental temperature and natural wind. The performance should be improved during winter but faces a freezing risk. The traditional modifications to relieve the adverse influence of winter chills were mainly based on "try and error". In this study, concentrating on the potential of airside adjustments of louvers, a 3D numerical model of large-scale dry cooling system of the whole coal-fired power plant is established. The inherent mathematical relationships of heat transfer processes in each column of NDDCT and condenser of turbine are deduced in the view of entransy. A global optimal control of opening degrees of louvers of NDDCT under crosswinds during winter is proposed. Taking a practical 660 MW supercritical dry cooling power generating unit located in north China as object, the potential of releasing the freezing risk by airside adjustment of louvers is revealed under both natural wind and winter chill conditions. (C) 2019 Elsevier Ltd. All rights reserved.
机译：自然通风的干式冷却塔（NDDCT）易受环境条件的影响，尤其是环境温度和自然风。冬季应改善性能，但面临冰冻风险。减轻冬季寒冷不利影响的传统修改主要基于“试错法”。在这项研究中，集中于百叶窗的空气侧调节的潜力，建立了整个燃煤电厂大型干式冷却系统的3D数值模型。从换热的角度推导了NDDCT每列与汽轮机冷凝器传热过程的内在数学关系。提出了冬季侧风条件下NDDCT百叶窗开度的全局最优控制。以位于中国北方的一台实用的660 MW超临界干冷发电机组为对象，揭示了在自然风和冬季寒冷条件下，通过百叶窗空气侧调节来释放冻结风险的潜力。 （C）2019 Elsevier Ltd.保留所有权利。

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  • 来源
  • 作者

    Wei Huimin; Ge Zhihua; Yang Lijun; Du Xiaoze;

  • 作者单位

    North China Elect Power Univ, Key Lab Condit Monitoring & Control Power Plant E, Minist Educ, Beijing 102206, Peoples R China;

    North China Elect Power Univ, Key Lab Condit Monitoring & Control Power Plant E, Minist Educ, Beijing 102206, Peoples R China;

    North China Elect Power Univ, Key Lab Condit Monitoring & Control Power Plant E, Minist Educ, Beijing 102206, Peoples R China;

    Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Gansu, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Natural draft dry cooling tower; Anti-freezing; Optimal operation; Louvers; Entransy;

    机译：自然通风干式冷却塔;防冻;最佳运行;百叶窗;运输;

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