KA-01a
Version 2.0
Replacement
Replacement of Air Conditioning Units up to 12 kW in Non-Residential Spaces
Refrigeration Technology
Measure Goal
The goal is to standardize the calculation of electricity savings that are triggered by replacing inefficient room air conditioning units up to 12 kW in non-residential rooms with energy-efficient units.
Symbols, Terms and Units
| Symbol | Description | Unit |
|---|---|---|
ΔE | annual electricity savings | kWh/a |
ΔEeco | cumulative electricity savings | kWh |
PK | cooling capacity | kW |
EER | Energy Efficiency Ratio | — |
hVL | annual full load hours | h/a |
Ns | standard effective duration | a |
Calculation Formulas
Annual Electricity Savings
ΔE = PK × hVL × (1/EERvor - 1/EERnach)
The annual electricity savings result from the cooling capacity, full load hours and the difference in efficiency before and after replacement.
Cumulative Electricity Savings
ΔEeco = ΔE × Ns
The cumulative electricity savings result from the annual savings multiplied by the standard effective duration.
Examples and Scenarios
Scenario A
Savings
Replacement of 10 room air conditioning units with 5 kW cooling capacity each
45'000
kWh
Inputs
Kälteleistung: 5 kW, EER vorher: 2.5, EER nachher: 3.5, Volllaststunden: 1'200 h/a
Downloads
Documentation (PDF)
Complete technical documentation including calculation basis
Excel Calculator (XLSX)
Interactive calculation tool for savings
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