Range Dew Point (°F) (ft) Rate of (°F/hr) Recommended A1 to A4 to 15.8°F DP to 59°F DP and 60% RH N/A Allowable A1 59 to 10.4°F DP and 8% RH to 62.6°F DP and 80% RH 62.6 10,000 9*/36 A2 50 to 95 10.4°F DP and 8% RH to 69.8°F DP and 80% RH 69.8 10,000 9*/36 A3 41 to 10.4°F and 8% RH to 75.2°F DP and 85% RH 75.2 10,000 9*/36 A4 41 to 10.4°F DP and 8% RH to 75.2°F DP and 90% RH 75.2 10,000 9*/36 B 41 to 95 8% to 82.4°F DP and 80% RH 82.4 10,000 N/A C 41 to 8% to DP and 80% RH 82.4 10,000 N/A 4 F
*More stringent rate of change for tape drives ©ASHRAE 2015 Thermal Guidelines Table I-P Version (updated to errata issued July 25, 2016). Reformatted by LBNL Table – ASHRAE Recommended and Allowable Temperature and Humidity Ranges for IT Inlet Air 5. Electrical System Description Utility Feed and General Description Include basic information about how electricity is fed into the building and to the IT equipment. UPS System Count, topology, whether meters were present and working. Table 5 shows the loading of the A and B UPS systems. Briefly explain where data in table came from. Units UPS-A UPS-B Combined UPS Input kW xx xx xx UPS Output kW xx xx xx Losses kW xx xx xx Efficiency % xx xx xx Load Factor % xx xx xx Table 5 – UPS Electrical Measurements Distribution Transformers/PDUs Provide a and basic description of PDUs used to distribute electrical power to the IT equipment including kVA, meters present and data they provide, and whether all metering work properly. Lighting Cover type, count, and any other relevant information. 6. Benchmarking The purpose of this section is to summarize the metrics that were calculated as part of the assessment process and compare them to data from other facilities, where available. Overall Efficiency Metric The PUE (total energy/IT energy) metric was calculated based on the Month/Year data and found to be x.x, which is better/worse than average. See Figure 3. Figure 3 – PUE (total energy/IT energy) Add line and text box to show your data center’s PUE and goal (if different than federal goal).
Grouped Efficiency Measures (EEMs) Estimated Installed Cost ($) Estimated Yearly Energy Savings (kWh) Estimated Yearly Dollar Savings ($) Estimated Simple Payback (Years) Totals $ $ Weighted average 8 – Saving and Payback Summary EEM 1 List EEM in more detail including why the measure is being recommended and helpful information for decision-making and implementation. EEM 2 List EEM in more detail including why the measure is being recommended and helpful information for decision-making and implementation. Additional Measures or Strategies Include additional guidance on overall strategies or things to consider going forward. The pie charts below show the current data center energy breakdown (Figure 7) and the projected energy breakdown after the implementation of recommended measures (Figure 8). The estimate of the absolute number of xx average kW in Figure 8 assumes the IT load stays constant. As the IT load grows, the absolute total number will grow, and the absolute energy use of the electrical and cooling infrastructure will grow, but the PUE typically decreases since the infrastructure generally gets more efficient as the load increases. Figure 7 – Current Facility Performance (xx total kW as of Month/Year)