Optimization of Supply Air Temperature in Data Centers
ICT
Measure Goal
The goal is to standardize the calculation of electricity savings triggered by optimizing supply air temperature in data centers. By raising the supply air temperature, cooling energy demand can be significantly reduced, taking into account IT equipment specifications and cooling system efficiency improvements.
Symbols, Terms and Units
| Symbol | Description | Unit |
|---|---|---|
EKälte | electricity consumption cooling system | kWh/a |
QKälte | cooling capacity | kW |
COP | Coefficient of Performance | - |
TZuluft | supply air temperature | °C |
PIT | IT heat load | kW |
Ns | standard effective duration | a |
Calculation Formulas
Stromverbrauch Kälteanlage
The electricity consumption of the cooling system results from the cooling capacity divided by the coefficient of performance (COP) multiplied by annual hours.
COP-Verbesserung durch höhere Zulufttemperatur
For each degree Celsius increase in supply air temperature, the COP improves by approximately 2%. This enables more efficient cooling generation.
Annual Electricity Savings
The annual electricity savings result from the IT heat load multiplied by the difference of inverse COP values and annual hours.
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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