GreenTech „Energy“-Expo

GreenTech „Energy“-Expo, 24.10.-10.11.22, In front of the SuperC building, Aachen


From October 24 to November 10, the exhibition "Green Technology - Environmental Technology for a Sustainable Future" will be held as part of the Knowledge Hub at RWTH.

The Knowledge Hub was established as a measure of the Excellence Strategy to strengthen the transparent and traceable transfer of knowledge to society. Innovative research contributions from RWTH, for example in the fields of energy efficiency, environmentally friendly generation, storage and distribution of energy, draw attention to the major challenge posed by the energy transition. ISEA is participating with two research contributions and an energy exhibit:

  • Change in the Energy System - Energy Sources of Today and Tomorrow
    Fossil energy sources - the primary form of energy is heat
    The combustion of fossil fuels such as coal, gas and oil and nuclear fission in nuclear power plants generate heat; the energy created by this is converted into electricity with the help of generators. Only a small proportion of energy sources are used directly as materials, for example in the organic chemical industry. Around 17 million metric tons of oil are used there, which corresponds to around 15 percent of the oil consumed in Germany each year. Replacing these hydrocarbons with renewable molecules would mean an additional energy requirement (electricity) of around 50 percent of the amount of electricity already used in Germany today.
    Future energy system - the primary form of energy is electricity

    The energy transition strives for an energy system based on regeneratively generated electricity through photovoltaics (solar cells) and wind turbines. A key success factor is the competitiveness of these technologies, which has been achieved in the last decade. The changeover is thus from heat to electricity, which, as the highest-value form of energy, can be converted into all the forms of energy required, such as power, communications, light, heat and chemicals. Direct use of electricity is the most efficient option in most cases, as it results in the lowest conversion losses.
    However, there are exceptional applications, such as in international air traffic: Here, material fuels generated from electricity must be used that are based on hydrogen, which in turn can be converted into so-called eFuels in combination with carbon. These are synthetic fuels that can be used in the same way as conventional kerosene or diesel. However, further conversion losses have to be accepted for their production.
  • EU Research Project NAUTILUS: For environmentally friendly maritime transport

    Alternative power generation system for passenger ships
    Maritime transport is one of the largest emitters of greenhouse gases and pollutants.
    NAUTILUS (Nautical Integrated Hybrid Energy System for Long-haul Cruise Ships) is an EU-funded research project - with the participation of RWTH - and it aims to reduce the environmental footprint of maritime transport by introducing an alternative hybrid propulsion system for passenger ships through electrification and the use of liquefied natural gas (LNG).

    NAUTILUS aims to increase the energy efficiency of the propulsion system by 10 percent and reduce CO2 emissions by 40 percent and other air pollutants by 99 percent.

    Novel technology for maritime transport for the first time
    The technology investigated in the NAUTILUS project is the maritime application of the solid oxide fuel cell (SOFC) in combination with a battery system. SOFCs convert chemical energy (such as hydrogen, natural gas, diesel) directly into electrical energy. Successful adoption of this scalable technology in marine applications enables fuel flexibility and results in high conversion efficiency. The challenge in a marine propulsion system is to cope with large changes in power demand, for example when accelerating or maneuvering in port.

    RWTH develops a needed energy management unit
    For the combined heat and power supply of ships, the team led by Cem Ünlübayir from the Institute for Power Electronics and Electrical Drives (ISEA) at RWTH Aachen University is developing an intelligent energy management unit. This will optimize the efficiency of the fuel cell. The state of charge of the lithium-ion battery is adjusted in each case so that both maximum support of the on-board network and recharging are possible while maintaining a long service life.

  • Energy Model
    The energy transition - challenges and solutions in electrical energy supply Alternative Energy supply of the future
    As part of the RWTH's 150th anniversary celebrations at the Centre Charlemagne, ISEA created an energy model of the Aachen region. The exhibit model shows some solutions for the future energy supply. In this context, the electricity sector will also have to provide substitutes for coal, oil and gas for heat supply and mobility in the future.