What is PUE?
PUE is used to compare a data center’s infrastructure energy use to that of the IT equipment such as servers, storage devicers, and switches. The equation is total power entering the data center divided by the total power required to run the IT Equipment. The closer to 1 the PUE, the more efficient the data center is. Source = http://www.42u.com/measurement/pue-dcie.htm#What-is-PUE?
If you know the IT load and total facilities load, you can use this easy calculator to find out your PUE, estimated anual energy costs, and anual carbon footprint. http://www.42u.com/measurement/pue-dcie.htm#PUE/DCiE-Calculator
PUE (Power Usage Effectiveness) is the ratio of total energy consumption (servers + cooling) to ‘useful’ energy consumption (servers only). During our test, the IT equipment is consuming 8240 Watts. The total power, including the FFAC fans and control system is 8680 Watts. The PUE is 8680/8240 = 1.055. A PUE of 2 is an accepted industry average for data-centers. More info on Data Centers metrics: http://www.thegreengrid.org/gg_content/Green_Grid_Metrics_WP.pdf Will the impact of incoming dust on the reliability of data center equipment be tested? Outside Air is filtered with G4 filters. These filters guarantee > 90% dust capturing. Experience proves that this keeps the environment within ETSI 300-019 : art 5.4. ( Sand < 30mg/m³, Dust(suspension) < 0.2 mg/m³, Dust (sedimentation) < 1.5 mg/m²h) . Maximum pressure drop is 250 Pascal. Filters will have to be replaced aproximately 2 times / Year depending on outside conditions.
