Wood gas: energy efficiency and financial economy

The previous post on wood-burning motorcycles may seem jokey, though there were some 200,000 woodgas-burning vehicles operating in Northern Europe in WWII (see History section).

In terms of energy returned on energy invested (EROEI, or EROI), biofuels generally seem very poor:

(source: Wikipedia)

But as this site points out, wood gas has some advantages: "Converting biomass to a liquid fuel like ethanol or biodiesel can consume more energy (and CO2) than the fuel delivers. In the case of a wood gas car, no further energy is used in producing or refining the fuel, except for the felling and cutting of the wood. This means that a woodmobile is practically carbon neutral, especially when the felling and cutting is done by hand."

It can even make sense in the more elastic terms of money: the UN Forestry Department did a study in 1986 and looked at power generation for a sawmill, using wood waste generated on site so that there was no purchase cost. The savings were significant:

As the sawmill example shows, there is plenty of mileage in intelligent problem-solving at the local level, and there is no one-size-fits-all solution. Long-term and big-picture planning are needed, but subsidies and other kinds of central government interference can skew cost-benefit analyses and result in misallocation of resources.

Of course, one could wonder why we zoom about so much in the first place:

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Peak bog rolls

As concern continues over future energy shortages, let's go back down Memory Lane to 1974...

January: bread and toilet rolls

September: sugar

... and, although we had about 1,000 years' supply in the UK, salt.

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London in the 1960s

See this Flickr collection - and contribute if you like. (htp: Dark Roasted Blend)

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Wood-burning motorcycle

htp: Dark Roasted Blend

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Update on bee deaths

According to Michael Snyder, about a third of US bees were wiped out this year. He goes on to discuss suspected causes and give a long list of important crops that require insect pollination.

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Peak Oil, EROEI and the Muffled Drum

An interesting thing happened last month. The Oil Drum, a well-regarded website + blog, announced it was ceasing operations and archiving itself for posterity. Well, everything has its day - we can all list blogs that were thriving a few years back but are no longer with us.

Some have suggested it was the extraordinary shale-based renaissance of US gas and oil production that did for the Drum. Probably not. But, fairly or unfairly, the Drum was associated with 'peak oil', which at its simplest is a view (or theory or doctrine or whatever) that global oil production - as a function of oil-in-the-ground - is doomed to peak, after which we start 'running out of oil'.

At its simplest, it is Malthusian hogwash. Of course, there are more nuanced versions than that, and the Drum shouldn't be tarred with the brush one would use for countering hogwash. Much more important is the concept of EROEI - energy return on energy invested, which has been another Drum favourite. And this concept really does bear careful consideration. Declining EROEI could be the end of civilisation as we know it for, in the immortal words of James Lovelock - "civilisation is energy-intensive". Better believe it.

So - no more drum-beat. But you'll not stop hearing about EROEI.


This post appeared first on the Capitalists@Work blog


All original material is copyright of its author. Fair use permitted. Contact via comment. Nothing here should be taken as personal advice, financial or otherwise. No liability is accepted for third-party content, whether incorporated in or linked to this blog; or for unintentional error and inaccuracy. The blog author may have, or intend to change, a personal position in any stock or other kind of investment mentioned.

Are homicide and inequality inversely related?

http://www.libertarianprepper.com/the-sinister-roots-of-socialism/gini-index-usa/

 

 http://www.bjs.gov/content/pub/pdf/htus8008.pdf

 

All original material is copyright of its author. Fair use permitted. Contact via comment. Nothing here should be taken as personal advice, financial or otherwise. No liability is accepted for third-party content, whether incorporated in or linked to this blog; or for unintentional error and inaccuracy. The blog author may have, or intend to change, a personal position in any stock or other kind of investment mentioned.