The cooling performance of a fan and pad system applied in a subtropical desert greenhouse (in Ahvaz-Iran) was evaluated during the critical climatic period from May to October using validated Computational Fluid Dynamics (CFD) method. The boundary and initial conditions of the models were set based on regional meteorological reports. Pad was separately simulated inside a wind tunnel and the porous media properties were extracted and applied in the greenhouse model. Transient fan and pad saturation efficiency, indoor temperature and its homogeneity in comparing to natural ventilation were considered for this evaluation. The regional meteorological reports, as well as physical experiments, approved the accuracy of the CFD models. 15–25 °C temperature reduction with a higher temperature heterogeneity was observed at the crop region in comparing with naturally ventilated from May to October. A transient fan and pad saturation efficiency from 57% to 77% was observed during the warmest day of the year (16 July 2019). Comparing indoor microclimate at the solar noon during the critical period of the year, showed a variable fan and pad saturation efficiency from 58% to 75% due to the variable solar heat load and dynamic seasonal climatic conditions.

在五月至十月的关键气候期间，使用经过验证的计算流体动力学（CFD）方法评估了应用于亚热带沙漠温室（位于阿瓦士-伊朗）的风扇垫系统的冷却性能。模型的边界和初始条件是根据区域气象报告确定的。在风洞内分别对垫进行了模拟，提取了多孔介质的特性并将其应用于温室模型。此评估考虑了瞬态风扇和垫的饱和效率，室内温度及其与自然通风相比的均匀性。区域气象报告以及物理实验均批准了CFD模型的准确性。与5月至10月的自然通风相比，在作物区域观察到温度降低15-25°C，温度异质性更高。在一年中最暖的一天（2019年7月16日），观察到风扇和护垫的瞬态效率从57％降至77％。在一年中的关键时期比较室内的小气候，由于可变的太阳热负荷和动态的季节性气候条件，风扇和护垫的饱和效率在58％到75％之间变化。