File talk:Energy density.svg

Batteries in the plot

I suppose that the chemicals are located accurately in the plot, but what about batteries? I think that battery technology has developed in recent seven years. Perhaps there should be several plots for batteries in different phases of development. For example Lithium-ion battery in 2005 and Lithium-ion battery in 2015. Also a loglog plot would show them better. ––Nikolas Ojala (talk) 20:09, 11 April 2015 (UTC)

Even taking the latest values from the Wikipedia:Lithium-ion battery page, the dot wouldn't move very much (0.95 MJ/kg and 2.43 MJ/L). I don't think a loglog plot is the right approach. I could see breaking the X-axis at 80 MJ/kg and skipping up to 140 MJ/kg to spread the lower data points out more. Similarly, you could break the Y-axis at 50 MJ/kg and skip up to 70 MJ/kg, or it may even make sense to just omit those 3 data points since they are not really interesting fuels? When I made originally made this plot, I took any material that had both MJ/kg and MJ/L values, so there was not a lot of "selecting" to the "selected" values. I don't know that matplotlib supports a broken axis, so I'm not sure it's an easy change to make this any more condensed. Omitting hydrogen would be unfortunate even though it blows out the axis. --Scott Dial (talk) 23:00, 25 August 2015 (UTC)

Anyway, I appreciate that plot very much as it is. ––Nikolas Ojala (talk) 15:39, 30 September 2015 (UTC)

File:Energy density DE.svg - Legend of y-axis

Excellent work! The legend the y-axis of a derivative work reads MJ/l, I had a long time to figure, what I is, until I understood it must be litres (L). → Why not write ℓ instead? I tried to modify the SVG, but my Inkscape was unable to do it. Can you give it a try? --Saippuakauppias (talk) 23:08, 24 April 2019 (UTC)

Sugar in the plot

"Sugar metabolism" should be specified as "Sugar crystal metabolism", which is what is used, judging by its density of 1.6 kg/L in the chart. Source: http://www.sugartech.co.za/density/index.php

(There are many forms that sugar comes in, from powdered to brown, with widely varying densities, and these would be in different places on the plot).

While we are at it, it would be interesting to add "oil (food) metabolism," which is approximately 37 MJ/kg = 34 MJ/L.

Uranium

Why isn't Uranium included here? 184.146.2.181 03:45, 14 January 2024 (UTC)