Optimization of UPS Redundancies in Data Centers
ICT
Measure Goal
The goal is to standardize the calculation of electricity savings triggered by optimizing UPS redundancies (Uninterruptible Power Supply) in data centers, taking into account efficiency improvements through reduction of unnecessary redundancies and improvement of UPS utilization.
Symbols, Terms and Units
| Symbol | Description | Unit |
|---|---|---|
EUSV | electricity consumption UPS system | kWh/a |
η_USV | efficiency UPS system | % |
PLast | IT load (power consumption) | kW |
fAuslastung | UPS utilization factor | - |
Ns | standard effective duration | a |
Calculation Formulas
USV-Verlustleistung
The UPS power loss results from the IT load multiplied by the inverse efficiency minus 1.
Wirkungsgrad in Abhängigkeit der Auslastung
UPS efficiency increases with higher utilization. At optimal utilization (50-80%), the highest efficiency is achieved.
Annual Electricity Savings
The annual electricity savings result from the reduction of UPS losses through better utilization and reduced redundancy.
Cumulative Electricity Savings
The cumulative electricity savings result from the annual savings multiplied by the standard effective duration and the correction factor.
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