@Article{fhmt.2026.081961,
AUTHOR = {Jiaxi Shen, Zhiyun Wang},
TITLE = {Heat Transfer Modeling and Failure Analysis of Dry Cooling Systems},
JOURNAL = {Frontiers in Heat and Mass Transfer},
VOLUME = {},
YEAR = {},
NUMBER = {},
PAGES = {{pages}},
URL = {http://www.techscience.com/fhmt/online/detail/27135},
ISSN = {2151-8629},
ABSTRACT = {This study focuses on the modeling and performance prediction of the condensation heat transfer process within an ACC system of a 100 MW unit. A one-dimensional physical model was established, and solutions were obtained using an iterative numerical method based on the first law of thermodynamics. The core of this work involves precise modifications to the heat transfer coefficient. Firstly, the Shah correlation for horizontal tube condensation was improved by incorporating the air mass fraction and the Jakob number to quantify the impact of non-condensable gases. Secondly, to assess the influence of the pipe installation angle, an inclination factor (I), which integrates the Eötvös number, Lockhart-Martinelli parameter, and a modified Froude number, was introduced to correct the heat transfer coefficient for inclined tubes. Furthermore, the relationship between the void fraction and steam dryness was investigated. The research provides a theoretical model and analytical tools for diagnosing typical operational issues in ACCs, such as backpressure optimization and environmental adaptability. It offers valuable guidance for enhancing the operational efficiency and reliability of air-cooled islands under varying conditions.},
DOI = {10.32604/fhmt.2026.081961}
}