Li Nanfeng, Zhong Tao, Zhou Lu, Huang Simin, Zeng Si, Liang Caihang
School of Mechanical and Electronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China.
Department of Science and Technology, Nanning College for Vocational Technology, Nanning 530008, China.
Membranes (Basel). 2022 Aug 18;12(8):793. doi: 10.3390/membranes12080793.
The applicability of a hollow fiber membrane evaporative cooler in hot-dry regions was investigated by experimental studies. To better understand the actual operating environment of the hollow fiber membrane evaporative cooler, the outdoor air design conditions for summer air conditioning in five cities were simulated by an enthalpy difference laboratory. Subsequently, the effects of water and air flow rates on outlet air parameters and performance parameters were investigated by setting-up a hollow fiber membrane evaporative cooling experimental rig. It was found that the hollow fiber membrane evaporative cooler has good application prospects in hot-dry regions such as Lanzhou, Xi'an, Yinchuan, Urumqi, and Karamay. Among them, the hollow fiber membrane evaporative cooler has higher applicability in regions with higher air temperatures and lower humidity such as Urumqi and Karamay. The results indicate that the air outlet temperature and relative humidity ranged from 26.5 °C to 30.8 °C and 63.5% to 82.8%, respectively. The outlet air temperature and relative humidity of the HFMEC can meet the thermal comfort requirements of hot-dry regions in the summer at an appropriate air flow rate. The maximum air temperature drop, wet-bulb efficiency, cooling capacity, and were 7.5 °C, 62.9%, 396.4 W, and 4.81, respectively. In addition, the effect of the air flow rate on the performance parameters was more significant than that of the water flow rate.
通过实验研究了中空纤维膜蒸发冷却器在干热地区的适用性。为了更好地了解中空纤维膜蒸发冷却器的实际运行环境，利用焓差实验室模拟了五个城市夏季空调的室外空气设计条件。随后，通过搭建中空纤维膜蒸发冷却实验台，研究了水流量和空气流量对出口空气参数和性能参数的影响。结果发现，中空纤维膜蒸发冷却器在兰州、西安、银川、乌鲁木齐和克拉玛依等干热地区具有良好的应用前景。其中，中空纤维膜蒸发冷却器在乌鲁木齐和克拉玛依等气温较高、湿度较低的地区适用性更高。结果表明，出风口温度和相对湿度分别在26.5℃至30.8℃和63.5%至82.8%之间。在适当的空气流量下，中空纤维膜蒸发冷却器的出口空气温度和相对湿度能够满足干热地区夏季的热舒适要求。最大空气温度降幅、湿球效率、制冷量分别为7.5℃、62.9%、396.4W和4.81。此外，空气流量对性能参数的影响比水流量更为显著。
