TE-TO Osijek, Croatia: Reduced CO2 emissions and significant energy savings with variable speed electric drive

The TE-TO Osijek power station, a combined heat and power (CHP) plant in Croatia, faced a critical challenge. Specifically, the management of three hot water circulation pumps within the central heating system proved to be unreliable due to frequent breakdowns and difficult maintenance. Downtime and repairs led to increased costs and operational inefficiencies. The customer, Hrvatska elektroprivreda d.d. (HEP Group), sought a solution to enhance reliability and reduce maintenance burdens.

We stepped in to address the challenge. After assessing the theoretical savings potential and conducting an on-site analysis of TE-TO Osijek’s entire drive train, we devised a concrete optimization concept. The obsolete and inefficient hardware was replaced, and a high-quality variable speed drive was implemented. This solution not only improved reliability but also achieved significant energy savings. We ensured a seamless replacement process, from project planning to commissioning, and continues to provide ongoing service support.

• Energy savings of 2,289 MWh in just three heating periods
• Reduced CO2 emissions of 800 - 1200 tones per season of central heating
• Increased operational reliability of the electric drive of the hot water pumps and the entire hot water system
• Return on Investment in just 4 years

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