On-line index analysis and simulation of data centers

 Reliability is an inherent property and a probability expression of the number of failures. Availability is not sensitive to failure frequency, but related to the level of operation and maintenance, which means the availability of data centers with low reliability is not necessarily low. The essential of the balance between reliability and availability is the balance between failure rate and average repair time. Calculates the reliability of data centers without and with air-cooled direct-expansion air conditioning by Monte Carlo simulation method. The availability of the former is 99.99%, the failure rate is 1.06×10-4 times/h, and the reliability (8 760 h) is 0.4. The availability of the latter is 99.86%, the failure rate is 3.6×10-4 times/h, and the reliability (8 760 h) is 0.04. Monte Carlo simulation method has the obvious advantages in the availability and reliability analysis of electrical and thermal downtime.