Thermal energy from wastewater 
In Duisburg, Zeppelin Power Systems has built and commissioned Germany’s largest innovative combined heat and power plant (iKWK) connected to a wastewater treatment facility. The plant was commissioned in June and will supply sustainable thermal energy to approximately 4,000 households through an approx. 4 MW heat pump.

To support this milestone project, Kelvion delivered two shell & tube heat exchangers. With a diameter of 600 mm and a length of 8 metres they are designed to transfer heat from up to 520 m³/h of treated wastewater, operating at temperatures between 8 °C and 25 °C. 

By extracting energy from treated wastewater before it’s discharged into the Rhine- river, the system not only supports clean energy generation, but also helps reduce thermal pollution.

Flexible energy supply 
Next to Duisburg, the Oberhausen project is a combined heat and power plant (CHP) where Kelvion and Zeppelin Power Systems are collaborating on reinforcing the growing importance of flexible, decentralised power generation as part of the energy transition.

Kelvion supplied 8 plate heat exchangers, including gasketed and brazed units.

These heat exchangers play a critical role in the thermal cycle, ensuring the efficient transfer of heat between process media while maintaining optimal pressure drop and thermal performance. Their compact footprint and robust construction made them ideal for integration into a CHP setup, where both space and operational efficiency are key.

A trusted collaboration with a shared vision
These two projects underscore the value of the long-standing partnership between Zeppelin Power Systems and Kelvion which share a commitment to innovation, energy efficiency, and engineering excellence. From detailed technical consultation to custom product design and delivery, the cooperation was characterised by open communication and shared objectives.

"Kelvion’s deep understanding of thermal systems and their flexible, solution-oriented approach made them the right partner for these projects. Their expertise was key in helping us implement technically demanding systems that will support the energy transition in our region."
— Daniel Schäfer, Project Manager, Zeppelin Power Systems

The result
The success of both projects will make a valuable contribution to Germany’s long-term climate goals.