Abstract The thermo-flow performances of air-cooled condensers (ACCs) get deteriorated severely under windy conditions for the inherent defects of rectangular array of condenser cells. In this work, a square array of ACCs is proposed to restrain the unfavorable effects of ambient winds. By means of CFD methods and experimental validation, the air variable fields, mass flow rates and total heat rejections of the ACCs with two types of arrays at different wind speeds and directions are obtained and analyzed. The results show that the reverse flow in the upwind condenser cells and hot plume recirculation of the peripheral condenser cells are both weakened for the proposed square array under windy conditions. Accordingly, the mass flow rate and total heat rejection increase a lot especially in the wind direction of −90° with a heat rejection improvement of 25.21% at the wind speed of 16 m/s, showing that the thermo-flow performances of ACCs get improved thanks to the square array of ACCs. In the absence of ambient winds, the total heat rejection of ACCs in the square array is almost the same as the conventional array.

中文翻译：

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方形风冷冷凝器阵列，可提高大风条件下的热流性能

摘要 由于矩形阵列冷凝器单元的固有缺陷，风冷冷凝器（ACCs）的热流性能在大风条件下严重恶化。在这项工作中，提出了一个方形的 ACCs 阵列来抑制环境风的不利影响。通过CFD方法和实验验证，获得并分析了两种阵列的空冷器在不同风速和风向下的空气变场、质量流量和总散热量。结果表明，在有风条件下，所提出的方形阵列的逆风冷凝器单元中的逆流和外围冷凝器单元的热羽流再循环均被削弱。因此，质量流量和总散热量增加很多，特别是在-90°的风向，风速为16 m / s时散热量提高了25.21％，表明ACC的热流性能得到改善到 ACC 的方阵。在没有环境风的情况下，方形阵列中 ACC 的总散热量几乎与传统阵列相同。