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Category Archives: Hydropower
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 alternative energy, biodiesel, biomass, coal, ethanol, natural gas, oil, renewable energy
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 energy storage, intermittency
4 Comments
Climate change effects on hydropower in California
[ The main impact is on hydropower, the largest source of renewable electric power in California, and besides natural gas, the only other way to balance wind and solar power, (unless utility-scale energy storage batteries become available). But hydropower is often … Continue reading
Posted in Energy, Hydropower
Tagged california, climate change, hydropower
Comments Off on Climate change effects on hydropower in California
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 hydropower, peak oil, peak water, water dependence
1 Comment
Hydropower dams and the ways they destroy the environment
[ This contains excerpts and paraphrasing of a 19 November 2014 NewScientist article by Peter Hadfield “River of the dammed“, followed by an excerpt from the paper the IPCC used to decide there were no limits to fossil fuel production … Continue reading
Posted in Dams, Hydropower
Tagged china, hydropower, Three Gorges dam
Comments Off on Hydropower dams and the ways they destroy the environment
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 electric, energy density, hydropower, PHS, pumped hydro
1 Comment
Hydropower is temporary. Dams silt up, limited rivers, long permitting process
1) Ultimately dams silt up, usually within 25 to 200 years, so hydro-power is not a renewable source of power. 2) We’ve already dammed up the best rivers. There are now more than 45,000 dams around the world, affecting more … Continue reading
Posted in Alternative Energy, Energy, Hydropower
Tagged bureaucracy, dams, permits
Comments Off on Hydropower is temporary. Dams silt up, limited rivers, long permitting process
