Computer room air conditioning, Evaporative cooling, System efficiency
The main objective of this paper is to estimate the system performance of an evaporative cooling assisted outdoor air system for air conditioning a data center. To evaluate the computer room air conditioning (CRAC) system used evaporative cooling technology, a mock-up for evaporative cooling assisted outdoor air system was designed. The feasibility of the evaporative cooling assisted outdoor air system is analysed by experimental test for a modular data center in Anseong, Korea. A mock-up system is designed by 43,000 m3/h of design fan flow, 160kW of the cooling capacity for air conditioning a data center. A design condition for the indirect evaporative cooler was set in 50% of sensible heat exchange efficiency and 65% of indirect evaporative cooling efficiency, respectively. A server rack simulator was installed to adjust the 160kW of sensible heat emission of modular data center. The experiment results show that the 59% of a sensible heat exchange efficiency and 78% of indirect evaporative cooling efficiency under experimental conditions.