French Négawatt association is advocating a changed attitude towards energy use, expressed in the three words “sobriété – efficacité – renouvelable” (translates as frugalness/modesty, effciency, renewables). On their website they show Sankey diagrams for a 2010 and a 2050 energy scenario. A simplified and a detailed version is available for both years. Below is the detailed 2010 version.


(see a high-res image with magnifying/zoom feature here)

Flows are in TWh. As common in this type of energy flow Sankey diagram they show in a left-to-right orientation the primary energy sources, energy conversion, and final use. Additionally there is a sum for each of the columns that tells us the overall energy efficiency: In 2010, to provide 1908 TWh energy to the users required 3009 TWh of primary energy (1,58:1).

These Sankey diagrams in my opinion are very-well structured, information-rich and don’t lack a certain esthétique

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