Optimization and energy saving analysis of direct evaporative air cooler applied to telecommunication equipment rooms

To solve problem that the direct evaporative air cooler applied to a telecommunication equipment room in winter cannot control humidity very well, presents an optimization scheme and its operation mode. Divides the whole year outdoor meteorological parameters into five regions, and adopts the different operation mode according to the parameters. Taking the ASHRAE TC 9.9 recommend operational area as the control target, evaluates the energy saving potential of the optimization mode, and calculates the running hours of the direct evaporative cooler for 31 provincial capital cities of China. The results show that the energy saving potential in Guangzhou, Nanning, Haikou are relatively low, the running hours are less than 40% of the whole year, among that Haikou’s is the minimum, only 10.6% and Lhasa is the maximum, up to 82.3%; expect for Zhengzhou, Kunming, Xining, Lanzhou can achieve above 60%, the energy saving potential of other provincial capital cities are between 40% to 60%.