干燥地区某地铁站直接蒸发冷却通风降温试验样机的性能测试与分析

Performance test and analysis of direct evaporative cooling test prototype for an underground railway station in dry area

为了研究直接蒸发冷却通风降温机组在干燥地区某地铁站中的应用效果,制作了一台直接蒸发冷却通风降温机组试验样机。采用理论计算与测试相结合的方法,对试验样机的风量、直接蒸发冷却效率、空气温降及阻力进行了试验研究。对比了4种方案下试验样机的冷却效果及阻力情况,得出在300mm厚填料三维布水、淋水密度6 000kg/(m^2·h)和迎面风速2.2m/s的情况下,试验样机的直接蒸发冷却效率达99%。

In order to study the application effect of direct evaporative cooling unit in an underground railway station in dry area, produces a direct evaporative cooling test prototype. Based on the combination method of theoretical calculation and test, studies the air flow rate, direct evaporative cooling efficiency, air temperature drop and resistance of the test prototype by experiment. Compares the cooling effect and resistance of the test prototype under four different schemes, and obtains that the direct evaporative cooling efficiency of the test prototype can up to 99% in the case of three-dimensional water spray on 300 mm thick padding, the water sorav density of 6 000 kg/（m^2 · h） and the face velocity of 2.2 m/s.