tag:blogger.com,1999:blog-7597656451205429515.post9202495729927063754..comments2024-02-16T17:52:44.944-06:00Comments on The Nuclear Green Revolution: EEStory, new chapter but no prototype.Charles Bartonhttp://www.blogger.com/profile/01125297013064527425noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-7597656451205429515.post-8523620538135740602009-04-23T09:25:00.000-05:002009-04-23T09:25:00.000-05:00My sceptical light is flashing. Relative permitivi...My sceptical light is flashing. Relative permitivity numbers don't mean much unless you also know at what voltage they were measured. Standard barium-titanate dielectric has a strong negative voltage coefficient, so effectively the capacitor becomes smaller as the applied voltage increases. This really kills the energy storage. Dielectric strength is also a big deal, as energy stored goes up by the square of the voltage (assuming constant capacitance).<br /><br />My guess is that practical versions of these capacitors are like practical fusion power -- only 10 years away (for the last 50 years).donbnoreply@blogger.com