All about EROI – Energy Return on Investment
Chris Nelder’s podcast – The Energy Transition Show probes particularly deeply into analysis and questioning of how the transition is progressing, and what are the accelerators and headwinds.
In Episode 7, Christ dialogues with his guest Dr. Dave Murphy, Assistant Professor, St. Lawrence University, on the subject of Energy ROI – how much energy does it take to harvest energy.
For example in the early days of Saudi oil fields the ration was 1:100, now it’s closer to 1:20. For every one unit of oil expended in extraction and delivery to cars, you get 20 units. Note the dropping trend.
On the other side with renewables, the trend is going in the other direction and accelerating.