Sunday, May 18, 2008

Sterling Denmark - but why the biofules?

One of the machines with greatest potential for supplying electrical power is the 200 year old invention of the Sterling Engine. It is basically a closed bicycle pump that moves a piston, turning a wheel or generator, when being heated or cooled. The clever part is that it is one of the engines that can work at moderate temperatures and make it into power. And another attempt of putting it to use is made in Denmark.

Stirling Denmark has announced the launch of their working Sterling Engine for biofuel producing an impressive 9 kW and 35 kW of power. The 9 kW model is however not for purchase before 2009. Cogratulations to the inventors who spent 15 years on making a commercial model! I sincerely hope you will succeed in selling it!

At first I was wondering why someone would use biofuels to power a Sterling engine when other cheaper options were available (sun, ground heat, composting, and potentially cooling sources as well...). There are no doubt technical reasons to the choice, but putting things in to context, biofuels do make sense. Biofuel is a hot new buzz-word that politicians love, and love to throw funding at. And scientists must adapt the science to what a handful of people with the money think are important. Biofuels currently seems to be the transition phase from fossil fuels to the better existing technologies (at continental pace), allowing a dilution of the fossil fuels into something renewable.

I also noticed in the product synopsis on Sterling Denmark’s website that the product description had a clever "Designed for biofuels etc." It is probably clever not to state too much of the actual potential of a working Sterling Engine in producing electricity from various sources to avoid too hard opposition. Clever, very clever Sterling Denmark! Keep going.

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