To generate electricity on demand, from hydrogen and oxygen, the WTZ Roßlau offers two different concepts. On the one hand, there is the unique, in-house developed zero-emission closed-loop motor (APC), and on the other, a solid oxide fuel cell (SOFC) for efficient reverse power generation.

Zero-emission closed-loop motor (APC)

The APC (Argon-Power-Cycle) is a real innovation in the field of emission-free engine concepts and a major step by WTZ Roßlau towardsCO2-free reconversion within an energy cell. WTZ sees itself as a technology leader in the segment of stationary…


…exhaust emission-free combustion engines and can already present an executable demonstrator with APC technology.

In December 2019, the concept was recognized with 1st place at the Hugo Junkers Prize for “Most Innovative Projects in Applied Research”.

In the current research projects, the APC engine is being consistently further developed and improved. Further investigations will focus on reducing the hydrogen injection pressure to improve the overall energy balance, but also on reusing the condensate for electrolysis.

Our aim is to push this technology further and establish it on the market as an environmentally friendly, highly efficient and cost-effective alternative to the fuel cell in the form of a combined heat and power plant.

Simulation of an energy cell

In addition to developing the hardware of an energy cell, the WTZ Roßlau also has the necessary know-how to evaluate the complex interrelationships of all individual components and influences on the basis of MATLAB®/Simulink® and…


…to be able to dimension. In consultation with the customer, various scenarios can be simulated using freely definable boundary conditions in order to provide the best possible solution for the customer.

Thus, the WTZ offers its customers a comprehensive portfolio of services, ranging from the initial concept development, to a detailed simulation, to the realization of complete energy solutions, for example in the form of an energy cell.