Strategies for measuring EROEI

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plato1965's picture
plato1965
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Joined: Feb 18 2009
Posts: 615
Strategies for measuring EROEI

 Just been thinking about something Chris mentioned in the house of commons lecture.

 

  We know that it's often very complicated to calculate the EROEI of a specific technology or strategy..

 what gets counted ?

 what fraction of the energy cost to build the road used to ship components should be taken into account.. ?

 

 I have a simple idea... let the price mechanism deal with all that complexity...

 In other words the PROFITABILITY of a choice should function as a rough analogue to its EROEI.. the price mechanism will take care of all the factors involved..

 

 As milton friedman explained even a simple pencil demands an incalculable number of people to produce, such that a planned economy is hopeless at allocating resources.. or setting prices.

 If you try to figure out theoretically what the pencil "should" cost, you'll need an army of economists working for years... but theres a far cheaper method, go into a marketplace, and look at the price label.

 If you want to know whether insulation or a solar panel has the better relative energy return, estimate the cost of purchase, and the value of energy produced/ or saved .. see what the ROI is..

 

plato1965's picture
plato1965
Status: Platinum Member (Offline)
Joined: Feb 18 2009
Posts: 615
Re: Strategies for measuring EROEI

 

 Here's the pencil speech..

 How much oil went into the pencil  ? The upper bound ...  price of pencil / price of oil.

 

plato1965's picture
plato1965
Status: Platinum Member (Offline)
Joined: Feb 18 2009
Posts: 615
Re: Strategies for measuring EROEI

 

 Short Catherine Mohr TED talk, about embodied + consumed energy. I'd have preferred a much deeper analysis, but... 10 minutes makes it hard..

 http://www.youtube.com/watch?v=xP4w2DMscGw

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