31 Jul 2013
Can we produce “clean” energy to: (1) cost effectively enough to put into use, (2) reduce dependance on foreign oil and US coal; and (3) reduce carbon emissions?
Despite a recent piece in the Wall Street Journal discussing Europe’s experience with higher cost, less dependable solar and wind power, the creativity of academia never ceases to amaze me. I recently came across an article about this publication, Environmental Science & Technology Letters and a paper in it about utilizing CO2 emissions from power plants in fluids, where the CO2 was split into positive and negative ions. The ions were then used to create a flow of electrons that could be captured by an electrode, creating electricity. While this proof-of-concept is not yet efficient (i.e., it uses more energy than it generates), the researchers believe that they may be able to turn that around and make it cost-effective. While this wouldn’t reduce CO2 emissions, it could double the amount of energy associated with the same emissions, effectively cutting CO2 emissions in half per kilowatt generated. If this works (and there’s no guarantee that it will), it would also enable us to continue to use the current grid system.
Just as interesting, and farther along, are the University of Michigan’s experiments, described here, with capturing energy from low flow water bodies. The concept of hydroelectric energy is not new but UM apparently thinks that they may have found an efficiency that others may have missed allowing energy to be generated without dams and using natural flow rates.
Whether these technologies will turn out to be cost-effective remains to be seen but the ingenuity of mankind certainly gives me hope that we can protect the planet, be efficient and not have to become luddites.