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Paris Metro Body Heat To Help Warm Building
The warmth generated by human bodies in the Parisian metro will help heat a public housing project in the city center, the capital's largest owner of social housing said Friday.
The calories emitted by passengers, around 100 watts per person, combined with the heat from trains moving along tracks and the underground location of the metro mean that corridor temperatures are 14-20 degrees Celsius all year around.
The project, which is based on geothermal technology, aims to draw heat from subterranean passages and move it to heat exchangers before supplying heating pipes. The system will complement district heating.