Improved energy efficiency and stability at Novo Nordisk water cooling plant
About the company
Novo Nordisk is a global healthcare company with leadership
in diabetes care. The company also has leading positions within
haemophilia care, growth hormone therapy and hormone replacement
therapy. Headquartered in Denmark, Novo Nordisk employs more than
29,300 employees in 76 countries, and markets its products in 179
- Energy savings of 40%
- Completely reliable production
Energy savings of 40%
The cooling system at Novo Nordisk used to be equipped with nine
pumps operating at full power around the clock. The only way of
regulating the supply was by using the manual on/off control. This
lack of control led to a disproportionate consumption of energy in
order to maintain the supply.
The company had an energy survey carried out to analyse the
scope for energy savings. The consultants recommended the
installation of an energy-efficient dual pump system at the cooling
water plant. But they also need to take stability into
consideration, for as the Production Manager says: "A full
year's energy savings is nothing compared to the production being
at a standstill for just a single day".
six large NK pumps in the basement at the company supply the
cooling water for production at the factory. The six NK pumps
together are able to supply no less than 3,200 m³/h of cooling
water every hour. They are precisely regulated using the Control
2000 unit. As for stability, the Production Manager notes: "The system today is far more reliable.
Should anything happen to a pump in operation, the control unit
makes sure that another one is started."
Prior to this project, energy consumption was determined at
After the conversion, the energy consultants expected savings of
920,000 kWh/year - 40% - in future. The entire project has a
payback period of approximately three years.