Paper written for the CORP.at conference March 22 to 25, 2026, in Vienna. My 2025 participation was a last-minute action, but now I have much time to prepare the paper.
| Abstract
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To meet the necessary cost optimization targets, we cannot hold the energy problem separate from all other problems: another major problem is housing.
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| Introduction
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Many imaginations about our future had been created in the past with completely different parameters. Unchecked conclusions from the past endanger our future with unbearable costs.
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| My personal experience with a profitability transition
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Birds can fly without knowing all the terms of aerodynamics. I reacted with my design change to an ongoing “profitability transition” without knowing the term at this time.
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| Energy transition
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The long way from random electricity from sun and wind towards 24×365 electricity. Overseen profitability transitions have to be considered as major accidents.
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| The GEMINI principle: double usage of land
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No better solar power plant, no better housing possible on the same ground is the ultimate target of the GEMINI principle.
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| Off-grid fast charging settlements
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It can start small, somewhere in a village, with a single GEMINI house with a big PV carport and 100 kW DC charging.
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| Energy-intensive industry
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I once developed a scale for off-grid solar possibilities depending on photovoltaic size. But now is to make a big jump upwards on this scale: running, energy-intensive industry.
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| Agriculture: How many square meters does a human need for his food?
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Mankind started as hunters and gatherers. 12,000 years ago, 500,000 m² to 2,500,000 m² per human. With the agricultural revolution, the land use was reduced by 2 magnitudes.
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| Conclusion
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All parameters are in a constant state of change. We have to check all the parameters and predict the development for the predictable future.
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| References
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Roland Mösl: Energy Optimised Settlements – Enabler for Necessary Civilization Targets, Graz 2025
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Left: hydropower plant Urstein - right; cement factory LEUBE
At the hydropower plant Urstein at the Salzach is a sign: 120 GWh/a, we supply to 35,000 households. Only 2.5 km distant is the cement factory LEUBE: 110 GWh electricity and 400 GWh heat for 600,000 t cement per year. Making a fire to bring the clinker to the required reaction temperature could be replaced by electric-only heating. The 400 GWh heat could be replaced by 250 GWh electricity. So the cement factory would be with 360 GWh/a fully electric, and the shield at the hydropower plant should be reworded with: 120 GWh/a, we supply 90 workers in the energy-intensive industry.
The non-SI unit “household” translates in middle Europe usually to 3,500 kWh/a electricity; the heating of the household is by burning, and they have only ICE cars. But even when we correct “household” to 8,000 kWh/a, the difference between 15,000 households and 90 workers in the energy-intensive industry is two orders of magnitude.
The energy subsidies in Egypt are running out. Electric-only cement production by photovoltaics is possible in all example locations.
What moderate production changes in Denmark and Austria? Simple 30 to 45 days berak around the winter solstice.. 