The most frequently asked questions answered for you

What is SmartEnergyTechnology (SET)?

SmartEnergyTechnology is a patented, innovative energy supply system from EXYTRON, which uses electricity from renewable energy sources to reliably supply properties from residential areas to city districts or industrial estates with electricity, heating and cooling in a decentralised and emission-free manner.

What is ZeroEmissionTechnology (ZET)?

ZeroEmissionTechnology refers to the unique, emission-free combustion of regenerative natural gas in EXYTRON’s energy supply systems. The carbon dioxide produced during combustion is recycled, stored temporarily and used again and again in a closed cycle as a valuable material for the production of methane. Moreover, modified combustion using oxygen produces neither nitrogen oxides nor fine dust or methane slip. ZET is therefore the key to an emission-free energy supply.

What is Power-to-X?

Power-to-X refers to various technologies that can be used to store and/or otherwise use surplus electricity from, for example, photovoltaic, hydroelectric or wind power. Examples are power-to-gas, power-to-liquid or power-to-heat. With the latter, excess energy can be used and/or stored in the form of thermal energy by means of heating rods or heat pumps. Power-to-liquid describes, for example, the production of renewable fuels such as LNG, methanol and DME. Power-to-X is an important component of EXYTRON systems.

What is Power-to-Gas?

Power-to-gas (PtG or also P2G) refers to a chemical process in which fuel gases (hydrogen, methane) are produced by electrolysis and, if necessary, downstream methanisation using regeneratively generated electricity.
EXYTRON GmbH has developed a power-to-gas plant which produces a high-purity regenerative natural gas (up to over 99% methane content). This methane can be stored in gaseous (SNG – synthetic natural gas) or liquefied (LNG – liquefied natural gas) form or fed into the gas network.

What is the difference between conventional power-to-gas systems and SmartEnergyTechnology (SET)/ ZET?

Until now, power-to-gas plants for methanisation have required a carbon dioxide source, e.g. biogas plants or coal-fired power stations. They are therefore location-dependent and the heat generated in the system often cannot be used, depending on the project. For this reason, the electricity-gas-electricity efficiency without heat utilisation in the individual steps of these power-to-gas plants is only very low, at around 30%. The SET/ZET can be used in a decentralised manner due to the patented recirculation of carbon dioxide from its own combustion. This means that it can be used directly on site at the customer’s premises, thus enabling the use of heat. In this way, the overall efficiency of self-generated energy using heating/cooling can be increased to over 90%.

For which applications can SmartEnergyTechnology be used? Are there lower and upper limits?

In the area of supplying buildings (residential buildings, housing estates, neighbourhoods, commercial properties, etc.) with SmartEnergyTechnology, there should be a minimum energy requirement of around 200,000 kWh/a of electricity and 400,000 kWh/a of heat. Furthermore, the possibility of installing or using existing PV systems with an annual production of at least the electricity demand. Smaller plants are technically possible, but the specific costs increase significantly the smaller a plant becomes. There are no upper limits to the size of the plant; industrial parks and entire city districts can be supplied.

Energy factories can be built where significant amounts of renewable energy are produced (e.g. wind farms) and where consumers such as local communities or industrial estates can be integrated in close proximity.

Is SET suitable for a completely self-sufficient energy supply?

Yes, a self-sufficient energy supply with SET is possible if the available renewable energies are sufficient to cover the total energy requirements of the building, minus efficiency losses. The plant must then be designed in such a way that the longest period of time during which no renewable energies are available can be bridged.

The system is therefore of particular interest for areas without the corresponding infrastructure. For example, in the absence of gas and electricity networks in large countries or in the area of island supplies.

Which markets are of interest when it comes to using SmartEnergyTechnology?

SET can be used wherever there is a surplus of electricity from renewable energy sources and where there are consumers of electricity, heating or cooling.

Can SET also be integrated into existing energy supply systems?

Yes, already existing energy supply systems can be integrated into the SET. For this to happen, certain technical requirements must be met, and integration should make sense both economically and in terms of energy.

What are the advantages of combining SET and biogas plants?

By using SET, the carbon dioxide in the biogas can be converted to regenerative natural gas together with hydrogen from EXYTRON’s methanisation plant. For comparison: So far, the proportion of methane in biogas is between 50 and 60%. The increased calorific value of biogas provides two options for increasing the efficiency of the biogas plant: Either more electricity is generated from the biogas or less gas/biomass is needed for the same yield. On the one hand, this increase in efficiency reduces the consumption of valuable acreage for the substrate and, on the other hand, reduces the areas of harmful monocultures.

What is sector coupling?

Sector coupling or sectors’ coupling or Integrated Energy refers to the intelligent networking of the three sectors of the energy industry: Electricity, heating and transport/mobility. Synergy effects between these sectors will make it possible to integrate a high proportion of renewable energy. Sector coupling is thus also seen as a key concept in energy system transformation and the development of energy systems with 100% renewable energies.