From the Mostly Uncommented Series, here is another one that has been sitting in my collection.

Black/White Sankey diagram for energy gains and losses in a building. Titles in French. Shadow effects. No values given. Unnecessary crossing of Sankey arrows. Not sure where I downloaded this from, will have to check my bookmarks. In the meantime, pls have a nice week-end…

After my last post on the Paris Urban Metabolism I continued to research that topic a little more. I came across another example from France. The below Sankey diagram is from an article on territorial metabolism in the rural village of Contres in France. (“H4 développe une démarche de métabolisme territorial à Contres”).

In this study, the consultant company H4 Valorisation analysed the material and energy flows liked to the villages economic and agricultural activities. Different scenarios were evaluated, focusing primarily on (1) reducing imports and rejects (waste and pollutants), (2) increasing usage of local resources, and (3) looking at reuse of material internally (les rebouclages internes).

The Sankey diagram shows both mass and energy in one diagram, so the inputs and outputs of the central node (representing the village of Contres) are not balanced when summed up. Mass flows are in tons (per year?) in blue and red colors. Energy is in Mwh per year and shown in orange color. Greenhouse gas emissions from energy used is also represented in pale yellow expressed in tonnes of CO2-equivalents.

Haven’t seen many Sankey diagrams dealing with urban metabolisms. So I was happy to stumble across this one for Paris, France on Nels’ blog.

Grey and one color seems to be en vogue for Sankey diagrams these days… 😉

A presentation from 2005 on the French energy flows included the Sankey diagram below (I prefer not to name the author or the link to the original source, in order not to embarass anybody).

This Sankey diagram is pretty much messed up, and definitely a candidate for the “Worst Sankey Diagram Contest” that has already been called for. It took me a few seconds to understand that the flows dangling vertically below the blue arrow are actually a breakdown of the 177 mtep consommation finale. Vraiment … j’ai vu mieux que ça!

This is more or less how I would do it. Less colors, a breakdown of the blue flow into the five consumption sectors.

Found Sankey diagrams with the energy balances of France for several years, thanks to this Planète Bleue blog post.

These energy balances are apparently produced annually by French DGEC (Direction Général de Énergie et Climat) and are different from the energy flow Sankey diagrams for various countries I have shown here in other posts.

In these French energy balances the left side shows the primary energy (expressed in mégatonne équivalent pétrole Mtep, mega tonnes of oil equivalent Mtoe in English) broken down into the different sources, the right side shows the final consumption of energy with the same breakdown. The differences are the energy losses and internal consumption in energy generation.

The large losses for nuclear energy are explained in a footnote for the 2007 diagram, where it says that these can be attributed to the fact that ‘Observatoire de l’Énergie’ (OE) accounting standard is based on heat value:

L’importance des pertes dans le domaine de l’électricité tient largement au mode de calcul adopté depuis 2002 par l’OE: l’électricité d’origine nucléaire est comptabilisée, au niveau de la production, en termes de chaleur, dont les deux tiers sont perdus lors de la conversion en énergie

Nevertheless the Sankey diagram gives a good idea about the efficiency of energy generation for each of the different fuels and the energy mix for France.

For those of you who wish to compare the developments over the last years, here is what I have dug up so far:
2003 is shown on Planete Bleue in this post.
2004 is shown above
2006 can be found here on page 25 (PDF)
2007 can be found here on pages 6/7 (PDF)