H-TEC Systems is a research and production company of the GP JOULE Group with headquarters in Lübeck. Since its foundation in 1997, it has been working on the research and development of products in the field of hydrogen technology. Since 2010, H-TEC SYSTEMS has been developing processes and equipment for industrial use and now offers customers the H-TEC Series-S stacks and electrolysers with the H-TEC Series-ME.
Since 2010, H-TEC SYSTEMS has also been part of the GP JOULE Group, which integrates hydrogen-based energy storage technology into intelligent operation and utilisation concepts for renewable energies. Effective sector coupling is already possible today with the H-TEC electrolysers.
The technology of water electrolysis enables a number of very important applications: The intermediate storage of very large amounts of "electricity" over a long period of time, as well as the provision of fuel for hydrogen mobility and material use. Thus, the cost-efficient conversion of clean wind and solar power into storable hydrogen establishes the basis for rapid market access for renewable energies in the diverse fields of application of hydrogen as an energy source.
Power gap fillers of the megawatt class
As an energy storage device, a power gap filler makes it possible to delay the provision of electrical power, thus compensating for the difference between supply and demand. The project was initiated by the project partners GP Joule, H-TEC SYSTEMS and North Tec with the aim of developing a PEM pressure electrolysis stack and the corresponding pressure electrolyser suitable for mass production. The electricity is obtained from renewable energy sources and the pressure electrolyser is connected to an existing biogas plant. A suitable operating concept for the power gap filler was developed in parallel.
In the BMWI project, researchers implemented a power-to-gas-to-power concept for the medium- to long-term intermediate storage of surplus solar and wind power in the form of hydrogen. For the conversion, H-TEC developed a PEM electrolysis stack for a nominal input power of one megawatt. In combination with hydrogen storage and biogas technology, an efficient storage system has thus been created.
The PEM stack (proton electrolyte membrane) is used for PEM electrolysis, in which water is split into oxygen and hydrogen. Hydrogen is regarded as an important energy carrier. Oxygen can also be used for material and energetic purposes. The water is not completely converted in the stack, but acts as a cooling system at the same time. Unconverted water as well as water from the hydrogen drying process is recycled in the process water cycle and returned to the stack. The waste heat from the stack can be used in local district heating networks. It is therefore not necessary to use toxic or otherwise hazardous operational materials.
PEM electrolysis has potential
PEM electrolysis technology as a core element of the power-to-gas-to-power concept holds immense potential as the medium- and long-term energy storage of the future. The principle of electrolysis has been known for many years. However, the application as an energy storage device is new and presents challenges. PEM electrolysis has the great advantage over other types of electrolysis in that it reacts directly to changes in load, does not use hazardous or toxic operating materials, can be operated under pressure and is cold start capable - these are good prerequisites for energy storage. A high optimisation potential is seen in the mechanical and electrochemical service life. It is also the key to improving efficiency.
SERIES ME and SERIES-S30
The PEM electrolyser ME 100/350 - launched in 2017 - belongs to the SERIES ME from H-TEC and thus to the megawatt class. As a turn-key solution (for industrial hydrogen demand as well as for power refiners), the H-TEC Series-ME convinces with its high power density at low operating costs and is therefore highly efficient in economic terms.
The compact design of the H-TEC Series-ME makes transport, connection and usage possible almost everywhere. Thanks to heat extraction, H-Tec electrolysers achieve an overall efficiency of up to 95%. Upon request, a service team will take care of the complete operation management and the optimal integration into existing systems.
A four-year performance guarantee sets new standards and secures new paths for the industrial use of hydrogen. Thanks to a new stack and plant design, H-TEC electrolysers achieve a very good price/performance ratio and minimal manufacturing costs for hydrogen. They are thus available solutions for an effective sector coupling at short notice.
With the PEM electrolysis stacks of the SERIES-S30, particularly OEM customers (manufacturers whose components are purchased for their own production and then sold under their own brand, for example) find optimal products in the power range up to 10 kilowatts in order to integrate them into the hydrogen application. Their high current density allows a very compact size. The high-pressure version allows efficient gas supply to pressure tanks, and the modular design allows the technical specifications to be adapted to a wide range of customer needs and very easy integration into overall solutions.
“The diverse application possibilities, which are based on the technology of water electrolysis, represent a major difference between electrolysis and other, more "one-dimensional" storage technologies. In addition to the above, we see a great need for applications such as, for example, urban electromobility or short-term buffering of voltage and/or possibly even frequency peaks", emphasises Heinrich Gärtner, Managing Director of H-TEC SYSTEMS GmbH. "Irrespective of the mentioned examples, we are convinced that new applications will also be created by new storage technologies and thus new possibilities".
H-TEC SYSTEMS was founded in 1997 and has more than 20 years of experience in the research and development of hydrogen technology products. Since 2010, H-TEC SYSTEMS has been developing processes and devices for industrial use and is now represented at two locations in Schleswig-Holstein and Bavaria. Since 2010, H-TEC SYSTEMS has been part of the GP JOULE Group, which integrates hydrogen-based energy storage technology into intelligent operation and utilisation concepts for renewable energies.