Let’s take a quick break from earthbag building and look at an interesting source of clean, renewable energy that advocates say is virtually unlimited and available all over the world. Most readers are probably aware of geothermal power stations (industrial systems located at geothermal hot spots) and geothermal heat pumps that capture heat from the earth for buildings. Hot dry rock geothermal energy is a community-scale, mid-sized system between these two extremes that doesn’t have to be located on geothermal hot spots (although this would increase the efficiency). What do you think? Should this receive more funding and research than “clean and renewable nuclear energy”?
From the video: “Yes, Hot Rock Geothermal Energy can supply all the energy we’ll ever need, say scientists and environmentalists familiar with the technology. It taps the heat in the rock just below the ground. There is no environmental cost, no safety problems, no waste. And it works! This program explains how Hot Dry Rock Geothermal Energy functions – and why it’s not being fully developed.”
A Geodynamics project in a 1,000 square kilometer area of central Australia could produce enough steam generated electricity for all of Australia for 70 years. The electricity from this field is expected to cost the same as from coal-fired power plants but with no pollution. http://www.youtube.com/watch?v=CdYMXGtXbEA&feature=related