High temperature and humidity conditions in enclosed cabins pose a threat to the safety of staff and equipment, and will result in intensive energy consumption by conventional air conditioning dehumidification systems. Therefore, an improved dehumidification system integrated with precooling and recirculated regenerative rotary desiccant wheel was proposed. The effects of the process air parameters (temperature and humidity), precooling temperature and regeneration air parameters (temperature and flow ratio) were experimentally investigated. Key performance indicators were analyzed, including the moisture removal capacity (MRC), thermal coefficient of performance (COP_th), sensible energy ratio (E_s) and dehumidification coefficient of performance (DCOP). The MRC_tot was found to be improved by 29.7% at most compared with that of a conventional chilled water cooling system. In particular, the optimal MRC was obtained by an appropriate ratio between the regeneration and process airflows. The optimal ratio was determined between 8% and 20%. The DCOP and E_s of the rotary desiccant wheel decreased with increasing regeneration airflow ratio. Moreover, COP_th ranged from 0.33 to 1.17, and was improved with increasing process air temperature/humidity and decreasing precooling temperature. Overall, the feasibility of the system was verified and dehumidification characteristics under various working conditions were demonstrated to prompt its application.

封闭机舱内的高温和高湿条件对人员和设备的安全构成威胁，并会导致传统空调除湿系统消耗大量能源。因此，提出了一种改进的结合预冷和再循环再生旋转除湿轮的除湿系统。实验研究了工艺空气参数（温度和湿度）、预冷温度和再生空气参数（温度和流量比）的影响。分析了关键性能指标，包括除湿能力（MRC）、热性能系数（COP _th）、显能比（E _s）和除湿性能系数（DCOP）。MRC与传统的冷冻水冷却系统相比，_tot最多提高了 29.7%。特别是，最佳 MRC 是通过再生气流和工艺气流之间的适当比例获得的。最佳比例确定在 8% 和 20% 之间。旋转除湿轮的 DCOP 和E _s随着再生气流比的增加而降低。此外，COP _th范围从 0.33 到 1.17，并且随着工艺空气温度/湿度的增加和预冷温度的降低而得到改善。总体而言，验证了该系统的可行性，并证明了各种工况下的除湿特性，以促进其应用。