That sounds like a good material for Rossi to experiment with for active cooling. He might be able to reverse the thermal run away process while operating much closer to the limit of his ECAT thermal capacity. Do you know the temperature at which that these devices typically operate?
Dave -----Original Message----- From: Axil Axil <janap...@gmail.com> To: vortex-l <vortex-l@eskimo.com> Sent: Fri, Jun 21, 2013 9:03 pm Subject: Re: [Vo]:Passive High Temperature Convective Thermal Control A lithiumheat pipe providesenough thermal capacity and power transfer density than you could ever want or need. Gravityis not a factor. The heat transfercan be controlled by a temperature regulation of the liquid lithium returnflow. More flow results in more cooling through heat transfer through phasechange from liquid to vapor. This phase change mechanism is 1000 more powerful than convection cooling. On Fri, Jun 21, 2013 at 8:42 PM, James Bowery <jabow...@gmail.com> wrote: Systems like the LFTR have passive high temperature thermal control based on thermal expansion of a near-critical mass density. As the temperature increases, thermal expansion produces a rapid drop in power production thereby stabilizing the reactor core. Systems like the E-Cat HT are solid state and, in any event, are not dependent on critical mass density, but another approach to utilization of thermal expansion might work: Thermal Convection To make thermal convection work, passive (free) convective forces must be large enough to move enough thermal capacity past the power source and must be in a regime where the rate of cooling exceeds the power production at the target temperature. The 3 variables one has to play with to reach the target temperature are material thermal properties, power density of the E-Cat and g forces. Of these three, only g forces and power density are amenable to continuous alteration via centrifugation and reactor fabrication respectively. In my ultracentrifugal rocket engine patent, the g-forces are so enormous that enormous fluid flow, hence enormous thermal capacity flow enables relatively small heat exchange surfaces to cool the engine. A material that might be worthwhile analyzing in this regard is NaCl (sodium chloride) with a melting point near the high end of the E-Cat HT, and a heat capacity comparable to that of H2O. It is problematic to run molten NaCl in an ultracentrifuge due to material strength limits as they detemper at high temperature. On the other hand, power density might be reduced to the point that the heat capacity flow rate, even under only 1-g, might be sufficient. Clearly some arithmetic needs to be done here.
