Promised savings achieved
Carlsberg’s energy consultant Bjarne Pedersen reports that the energy savings are already being realised, even before system optimisation is completed.
Because ZerAx calculations are based on frequency control, the total savings will exceed the fan-only savings.
We expect the fans to lead to cost reductions of 30%. The rest will come from improved control of our ventilation system. A tong test ammeter confirms that we are close to the expected savings.
Budget data
- Pre-upgrade consumption of old system: 890,400 kWh/year
- Theoretical consumption with fan upgrade: 451,528 kWh/year
- Savings due to upgrade: 438,872 kWh/year
The installation contractor has issued an official energy-savings certificate.
ROI of 2 years
The return on investment for consultancy, system replacement, and new fans is 2.2 years. The system upgrade is one of approx. 20 at the brewery with a full replacement programme that will total several millions GBP. The replacement occurs in phases where each installation must achieve payback within two years. Savings for the first system alone is expected to be around 49,000 GBP/year.
Carlsberg also values improved working conditions. Although the bottling hall is noisy, the new fans clearly move more air with far less noticeable sound.
Facts
- Up to 52% lower energy consumption
- 43% reduced energy consumption across all units
- CO2 reduction of 161 tons/year
