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Part of the solution for the EU energy crisis is already there, right under your feet
The energy crisis currently engulfing Europe has bought into sharp focus that energy is not only an environmental issue, but also a national security issue.
This is almost certainly making other nations take a careful look at their own situation. Who are they reliant on for their energy needs? This article published in Europe energypost last week draws attention to the heat energy wastage in European cities (as it is in cities all over the world) through wastewater networks and how easily and quickly this situation can be improved to make cities more energy efficient.
Is this also relevant to US cities?
Part of the solution for the EU energy crisis is already there, right under your feet
The current energy crisis in the EU, being driven by an urgent move away from Russian gas & oil, will require a change in thinking about where energy comes from and how it is used. Heating for homes, buildings and industries is a large part of the energy usage in the EU, and the REPowerEU strategy aims to electrify heating via a massive transition to heatpumps over the next few years. This will place new demands on city electrical networks, coming at the same time as electrification of transportation (cars, bikes, light commercial etc.) also placing new demands on city electrical networks. Planning and management of these competing energy demands will be difficult. But all European cities have wastewater networks right under your feet, carrying huge amounts of free low-grade heat. This heat energy is already in the city, where it is needed by buildings, and the infrastructure collecting and transporting this heat (the sewer network) is already built and available. Sadly, this energy is typically just ignored and flushed away every day.
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