Why not be more ambitious? 

• New pump with frequency inverter delivered energy cost savings of nealry € 20 000 annually
• Return on investment was 2.1 years

The company Paramo, Czech Republic, which produces and sells fuels, motor and process oils, asphalt and coatings for the construction industry, implemented an ambitious energy-saving project to replace its cooling-circuit pump.

The company had the option to simply upgrade the existing cooling-circuit pump with a more modern and efficient model. Instead, Paramo decided to install a new pump with a frequency inverter for maximum energy gains. Without a frequency inverter, the pump operates regardless of the actual cooling needs, i.e. constant flow. The frequency inverter adjusts the pump's output to the required cooling capacity, based on the temperature difference between the coolant (in this case, water) and the cooled element.

Key benefits

Altogether, the energy-saving measure cost Paramo € 42 000 (pump € 35 000, frequency inverter € 7 000). This yielded energy savings of about 800 GJ per year, which translates into energy cost savings of nealry € 20 000 annually. The payback period on this investment was 2.1 years.