Worldviews and energy futures

In last week’s post I linked to an article published recently in the Journal of Futures Studies (JFS) in which I look at the relationship between the questions that we ask about energy futures, what it is that we then take into account as relevant in exploring them, and the possible avenues for action that are apparent to us in the present as a result. As I pointed out, that article acts as a pretty good overview of the inquiry here at Beyond this Brief Anomaly, and also prepares the way for the phase into which this will head shortly. Before embarking on this next phase, it occurred to me that it might be worth dusting off some earlier work on which the JFS article was based that goes a little further in sketching out the background context for the inquiry, and that will help with locating the areas covered to date within that broader context. Continue reading

A rough guide to visualising energy density

In concluding the previous post, I pointed out the problem with comparing stock-based energy sources—such as fossil fuels and uranium—with flow-based sources—such as wind and solar radiation—on the basis of their associated energy densities. [Update: strictly speaking, we’re dealing here with the distinction between energy density and power density. While energy density is a straightforward and very useful way to characterise and compare energy storage media such as fuels and batteries, the infrastructure for producing fuels and electricity is often better characterised in terms of power density—the rate of energy transformation or supply per spatial unit. This reflects the more immediate dependence of a particular set of socio-economic arrangements, if it’s to be maintained, on its associated energy supply rates, rather than its energy reserves. For now though, I’ll continue the inquiry based on the concept of energy density, as it is arguably the more accessible concept given the nature of our direct experience with fuels—including our own fuels, the food that we eat!] Just to recap on the previous post, establishing a characteristic energy density for a given source requires that we first nominate an appropriate spatial dimension associated with that source. This is straightforward for stock-based sources involving a given quantity of material such as coal, oil or gas, and we can readily compare the energy densities between different sources. The characteristic spatial dimension is the volume occupied by the source material. Continue reading