Leading article Inner
Leading article Inner city and high-rise districts Where such installations are not possible (dense development, high-rises), the heat has to be produced elsewhere and transported. If there is a nearby waste water treatment plant, it could be developed into an energy centre that stores hydrogen in LOHC and supplies this to the residential areas, along with the waste heat ring, bakeries, wood drying, distillation processes, plastic processing etc... They too could store hydrogen and supply the waste heat from storage and electrolysis for heating after high-temperature utilisation. Here too, waste materials can also be incinerated with pure oxygen, producing very high temperatures for process heat of any kind or, in case of excess heat, electricity generation using small steam turbines. This heat should always include social capital as well, permitting the participation of less well off citizens. The cooperative would have to decide whether shares can be sold. My calculations to date support the conclusion that a profit for cooperative members is possible if the system is efficiently designed and operated. When this is viewed as an opportunity, disagreements could be resolved through the natural need to communicate with regard to joint ownership. People on the margins could also be made to feel that they belong. SOFC SOFC District heating from electrolysis as district heating. Companies and data centres often have unused waste heat as well. This lends itself to connection and utilisation in combination with heat pumps. In such cases, the electricity supply for residential areas can be provided with the help of fuel cells. The heat from the waste water treatment plant or from companies could be used by the LOHC, storing the hydrogen produced internally or supplied from the region to utilise the waste heat. Such buildings should also have rooftop PV installations to cover the own demand as far as possible (Fig. 3). Companies in the neighbourhood are another option, for example, cate- current, waste heat – hot water (…cooking) waste heat – hot water current heating Fig. 3: Energy supply concept for multi-family houses, inner city. District heating refers to all types of sources. can also be used for district heating when needed. If none of that exists or is possible, something would have to be built or classic district heating would have to be used. summer/PV winter Social opportunities for society As you can see, the future will be more decentralised with a great deal of personal involvement and cooperation. This can lead to the social pacification of critical urban regions. Other benefits are possible as well. Everyone should have the opportunity to participate financially in their energy centre, with electricity coming not from the outlet but from your own energy centre. This could be organised as a cooperative but References (1) Offshore Energy, 17 May 2022. First ammonia cracker prototype turns zero-emission shipping into a reality (Sweden), Helbio, a subsidiary of Sweden-based energy system developer Metacon, has delivered the first “ammonia cracker” prototype to the Norwegian maritime technology company Pherousa Green Technologies. (2) Energy 4.0, Jan 2022: Wasserstoff-Wertschöpfungskette: Hoch konzentrierten Wasserstoff aus Erdgaspipelines extrahieren (Hydrogen value chain: Extracting highly concentrated hydrogen from natural gas pipelines). The Author: Prof. Dr.-Ing. Eberhard Schlücker, Prof. i.R., Hydrogen and Energy Consultant 10 GREEN EFFICIENT TECHNOLOGIES 2022
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