Category Archives: Hydropower

Hydropower dams and the ways they destroy the environment

Preface. Hydropower comprises 71% of renewable energy worldwide.  Nations like the U.S. and Europe have dams that have reached the end of their lifespan, so more are being torn down than built. In the U.S. 546 dams were removed between … Continue reading

Posted in Dams, Hydropower | Tagged , , , | 1 Comment

Power density of biomass, wind, & solar take too much land to replace fossil fuels

Preface. Vaclav Smil writes “The fact that wind, solar, and biomass have incredibly low energy density per square meter means that a fully renewable system to replace the 320 GW of fossil fueled electricity generation and 1.8 TW of coal, … Continue reading

Posted in Alternative Energy, Biomass, Coal, Hydropower, Natural Gas, Oil | Tagged , , , , , , , | 2 Comments

Underground pumped hydro storage is the only technology capable of massive storage for renewable electricity

[ Picard concludes that “None of the candidate technologies for massive-scale renewable and sustainable generation of ‘‘green’’ electricity deliver it in a form suitable for high-efficiency storage. None of the prospectively-massive storage modes for transformed electricity is at present well … Continue reading

Posted in Electric Grid, Energy Storage, Grid instability, Hydropower, Renewable Integration | Tagged , | 4 Comments

Electric Cars and Biofuels switch dependence from foreign oil to domestic water and weather risks

  Figure 1. Energy/Water Nexus Amy Hardberger, Matthew E. Mantell, Michael Webber, Carey W. King, Karl Fennessey [ This Senate hearing covers a lot of ground. I found the most interesting testimony to be the intersection of water and energy, … Continue reading

Posted in Drought, Energy Production, Hydropower, Transportation, Water | Tagged , , , | 1 Comment

How climate change will affect energy production and transportation

[ Climate change and extreme weather will harm oil and gas exploration and production, fuel transport, thermoelectric power generation (coal, natural gas, nuclear, geothermal, solar concentrated power), hydropower, biofuels, wind, solar PV, the electric grid, and increase energy demand from … Continue reading

Posted in Blackouts, Cascading Failure, Climate Change, Electric Grid, Electric Grid, Energy Production, Hydropower, Ships and Barges, Water | Tagged , , , , , , , | Comments Off on How climate change will affect energy production and transportation

Hydropower has a very low energy density

To store the energy contained in 1 gallon of gasoline requires over 55,000 gallons to be pumped up 726 feet (CCST 2012). As a thought experiment look at what it would take generate all of America’s 4,058 TWh electricity, where … Continue reading

Posted in Energy Storage, Hydropower, Pumped Hydro Storage (PHS) | Tagged , , , , | 1 Comment