Experiments on application of evaporative cooling air conditioning system to data centers

Presents the structure, principle and operation modes of the evaporative cooling central air conditioning system combined with mechanical refrigeration. Analyses the measurement results of optimal operation condition of three operation modes. Combined with the characteristics of typical data centers, presents the suitable air conditioning forms: direct use of outdoor air supply plus enclosed cold channel and indirect use of outdoor air supply plus enclosed hot channel. Combined with the climatic characteristics of northwest region of China, calculates the effective cooling time with air supply temperature no higher than 20 ℃ under the corresponding operation modes of two air conditioning systems, and obtains the annual available time ratio of evaporative cooling.