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<p>The installation of air conditioning outdoor units in apartment buildings can increase indoor temperatures, raising fire risks. This study uses computational fluid dynamics to analyze airflow and temperature variations in outdoor unit rooms, focusing on the effects of internal obstructions and louver configurations. Horizontal, vertical, and Z-shaped louvers were examined under identical boundary conditions. Results show that louver orientation and obstruction placement behind the heat exchanger significantly affect airflow and temperature distribution, while the total volume of obstructions has minimal impact. Horizontal louvers with angles of 30° or lower direct airflow downward, raising internal temperatures. Vertical and Z-shaped louvers promote hot air re-entry, further increasing internal temperatures. Notably, Z-shaped louvers reduce flow area, causing additional downward airflow. These findings underscore the importance of optimizing louver angles and maintaining sufficient clearance behind heat exchangers to improve airflow, enhance cooling efficiency, and ensure safe operation in confined outdoor unit rooms.</p>

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Louver design and airflow patterns analysis of air conditioning outdoor units for enhanced safety and efficiency in apartment buildings

  • 期刊论文

  • 发表日期：

    2025年8月4日

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  • Sang Hun Lee,
  • Hyun Duk Yun,
  • Dong Kyun Im,
  • Byung Chang Kwag

摘要

The installation of air conditioning outdoor units in apartment buildings can increase indoor temperatures, raising fire risks. This study uses computational fluid dynamics to analyze airflow and temperature variations in outdoor unit rooms, focusing on the effects of internal obstructions and louver configurations. Horizontal, vertical, and Z-shaped louvers were examined under identical boundary conditions. Results show that louver orientation and obstruction placement behind the heat exchanger significantly affect airflow and temperature distribution, while the total volume of obstructions has minimal impact. Horizontal louvers with angles of 30° or lower direct airflow downward, raising internal temperatures. Vertical and Z-shaped louvers promote hot air re-entry, further increasing internal temperatures. Notably, Z-shaped louvers reduce flow area, causing additional downward airflow. These findings underscore the importance of optimizing louver angles and maintaining sufficient clearance behind heat exchangers to improve airflow, enhance cooling efficiency, and ensure safe operation in confined outdoor unit rooms.