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Heatwaves: How can we cool our cities?

By District Energy posted 07-29-2025 16:13

  

ENGIE

Summary

With heatwaves becoming more frequent, longer, and more intense across Europe and other parts of the world, urban cooling has returned to the forefront of public debate. Once seen as a matter of comfort, providing relief from extreme heat is now a public health issue. As the world’s leading operator of district cooling networks, ENGIE has developed valuable expertise in improving the efficiency of cooling systems and reducing their environmental impact.
Insights from Alexis Goldberg, Chief Commercial Officer for Cooling Networks in France, and Romain Rousselet, Head of Urban District Cooling Markets for France.

"Cooling cities has become a public health necessity. To be resilient, cities must adapt by all available means.
Among passive solutions, we have urban greening which creates cooling zones and biodiversity corridors, absorbs CO₂ through photosynthesis, and makes cities more livable. According to Cerema, a major French public agency for urban planning, greening a schoolyard can lower perceived temperatures by 2 to 4°C. Reflective roofs can reduce indoor temperatures by an average of 8°C.


But passive measures alone aren't enough. We also need active solutions—especially alternatives to individual air conditioning. This is where district cooling networks come in: centralized systems that produce cooling on a large scale and distribute it to buildings through chilled water pipelines."

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