Categories
-
Recent Posts
- Electrifying freight trains in the U.S. is a bad idea
- Why Nuclear Power can’t replace fossil fuels
- Energy, Water, & Climate Change are interdependent
- Why fusion power is Forever Away
- Climate Change dominates news coverage at expense of other existential planetary boundaries
- Excerpt from “The Geopolitics of Resource Wars”
- Homes & Buildings
- Book Review “The Outlawed Ocean” by Ian Urbina
- Underestimating the Challenges of Avoiding a Ghastly Future
- Motherboards: too complicated to make after oil
- “More and More and More” one of the best books on energy ever written
- The staggering destruction of knowledge by Christians in the Roman Empire
- Why the R/P Reserves to Production ratio does not show when oil will run out
- Catton on Collapse “Bottleneck: Humanity’s Impending Impasse”
- Book Review of Grain Brain: Extraordinary claim not backed up by evidence
Category Archives: EROEI Energy Returned on Energy Invested
Net Energy Cliff & the Collapse of Civilization
figure 1. The remaining oil is poor quality, and the energy to get this often remote oil so great that more and more energy (blue) goes into oil production itself, leaving far less — the grey area — available to … Continue reading
Do you want to eat, drink, or fly?
Preface. In this post the New York Times writes about renewable airplane fuel from corn ethanol, and questions whether there is enough water and a few other problems. First I’m going to summarize their issues with this, and then follow … Continue reading
Posted in Airplanes, Biofuels, Biomass EROI, Groundwater, Peak Water
Tagged aquifer, aviation fuel, corn, EROI, ethanol
Comments Off on Do you want to eat, drink, or fly?
Concentrated Solar Power is unreliable, full of glitches, & has a low energy return
Preface. Concentrating solar power (CSP) projects usually sprawl in a circle over several square miles and can cost over a billion dollars. They use mirrors and lenses to capture the high temperatures needed to efficiently produce or store electricity. Almost … Continue reading
Posted in Concentrated Solar Power, Solar EROI
Tagged capacity factor, concentrated solar power, CSP, EROI
2 Comments
Biogas from cow manure is not a solution for the energy crisis
Preface. Smil’s article about biogas sums up why it won’t contribute to energy shortages as fossils decline. Biogass doesn’t scale and is easy to muck up. Hayes (2015) also makes this case, pointing out that even if every ounce of … Continue reading
Posted in Biofuels, Biomass EROI, Peak Biofuels, Pollution
Tagged bacteria, biofuel, biogas, cow manure, EROI, pollution
2 Comments
Negative energy return of solar PV in Northern Europe
Preface. I once yanked this paper after huge blow back, almost as bad as nuclear proponents, but in the past few years, I have no reason to doubt Ferroni and Hopkirks methods, boundaries, or conclusions, so I’m putting this post … Continue reading
Posted in Photovoltaic Solar, Solar EROI
Tagged energy return, EROEI, photovoltaic, solar
Comments Off on Negative energy return of solar PV in Northern Europe
Even Pencils will be hard to make
Preface. Most of us are unaware of how complex our society is, how things are made, how food is grown, how stuff is delivered, and the people, energy, transportation, and kinds and sources of materials in every day objects. This … Continue reading
Posted in EROEI Energy Returned on Energy Invested, Localization, Supply Chains
Tagged collapse, EROEI, manufacturing, peak oil, pencil
2 Comments
Many steps using fossil fuels to make cans & potato chips
Preface. I am gobsmacked by how much energy goes into making beverage cans and potato chips, look at all the steps, each one using energy! Why haven’t we run of oil yet? Especially when you look at everything else out … Continue reading
Renewable costs don’t include transmission & energy storage backup from Nat Gas & Coal plants
Preface. Wind and solar advocates don’t include transmission and backup costs in their net energy and cost calculations. But without fossil backup, the electric grid will come down due to lack of storage. There is almost nowhere left to put … Continue reading
Posted in Electric Grid & EMP Electromagnetic Pulse, Energy Storage, Solar, Solar EROI, Wind, Wind EROI
Tagged energy storage, fossil fuel backup, renewable, solar, wind
2 Comments
The Invisible oiliness of everything
Preface. Even a simple object like a pencil takes hundreds of actions and objects requiring fossil energy to do and make. Not electricity. This is on of many reasons why wind, solar, or other contraption that make electricity can’t replace … Continue reading
What on earth is exergy?
Preface. This is one of the best explanations of exergy I’ve been able to find. This paper makes the case that exergy ought to be considered by just about every industry and government to achieve greater energy efficiency, and makes … Continue reading
Posted in Exergy
2 Comments