tech
‘Kind of miracle solution’: How Paris is harnessing the Seine to replace air-con
City plans to triple system of underground pipes that distribute chilled river water, reducing need for individual cooling units
TL;DR
- Paris is expanding its district cooling network, which uses chilled water from the Seine River to cool public buildings.
- The system circulates cold river water through underground pipes, transferring heat from buildings to the river without mixing the water.
- This approach aims to be more energy-efficient than individual air-conditioning units and combat the urban heat island effect.
- Fraîcheur de Paris operates the network, with plans to triple its size by 2042 to serve more buildings across the city.
- While beneficial, implementing similar systems elsewhere faces hurdles related to cost, geographical suitability, and concentrated demand.
- Studies suggest the system's heat exchange causes only small, regulated temperature changes in the Seine, staying within environmental limits.