The Maisotsenko cycle (M-cycle), which is a dew-point air-cooling system, has been identified as a promising alternative to conventional air conditioning systems. Previous works have focused on conducting feasibility studies of using the M-cycle in various applications in different climates while the optimization of the process and the impact of important design and operational aspects received few interests. In the present work, the impacts of various geometrical and operational aspects on the M-cycle performance were theoretically investigated. Six configurations of the counter-flow M-cycle were studied and compared numerically. These configurations included a circle, a rectangle with different aspect ratios (width-to-height ratio), and a triangle with various angles. In the circle and triangle configurations, the dry and wet channels were considered to be concentric, where the dry channel was surrounded by the wet channel. However, the plates were put on each other in rectangular geometries. A heat and mass transfer model of the counter-flow M-cycle was developed and validated using the previous numerical and experimental results of Riangvilaikul and Kumar. The influences of the hydraulic diameter and the length of the channel were investigated. Furthermore, the impacts of operating conditions, such as intake air temperature, intake relative humidity, intake air velocity, and water temperature, on the overall M-cycle performance were also examined. The system's performance was expressed in terms of dew-point effectiveness, wet-bulb effectiveness, coefficient of performance, cooling capacity, and water consumption. The obtained results show that it is preferable to maintain the intake air velocity between 2 and 3 m/s for all the considered cases. The triangular geometry with a 60° angle appears to be the best geometry. In addition, the circular shape was found to be preferable to the rectangular geometries.

Maisotsenko循环（M循环）是一种露点式空气冷却系统，已被认为是传统空调系统的有前途的替代方案。先前的工作着重于进行在不同气候下在各种应用中使用M-cycle的可行性研究，而过程的优化以及重要设计和操作方面的影响却鲜有关注。在当前的工作中，从理论上研究了各种几何和操作方面对M循环性能的影响。研究了六种逆流M循环的配置并进行了数值比较。这些配置包括一个圆形，一个具有不同长宽比（宽高比）的矩形以及一个具有各种角度的三角形。在圆形和三角形配置中，干通道和湿通道被认为是同心的，其中干通道被湿通道包围。但是，这些板以矩形几何形状彼此放置。利用Riangvilaikul和Kumar的先前数值和实验结果，开发并验证了逆流M循环的传热和传质模型。研究了水力直径和通道长度的影响。此外，还检查了进气温度，进气相对湿度，进气速度和水温等运行条件对整个M循环性能的影响。该系统的性能用露点有效性，湿球有效性，性能系数，冷却能力和耗水量表示。获得的结果表明，在所有考虑的情况下，最好将进气速度保持在2至3 m / s之间。具有60°角的三角形几何形状似乎是最好的几何形状。另外，发现圆形优于矩形几何形状。