A decade ago, an ultra-efficient heat pipe was making the rounds, and getting some funding. DoD was interested as was NASA and some money went into it. See: Preliminary Results of an Experimental Investigation of the Qu Superconducting Heat Pipe James Blackmon NASA/Huntsville
But AFAIK the Qu tube tech, if there was anything to it, did not make a commercial or military impact and Dr. Qu disappeared back to China. But not before the report above concluded that the Qu Tube showed high thermal conductivity, with lower bounds as determined by the fin equation on the order of 10,000 to perhaps 30,000 times that of copper. Not bad. Fast forward many years - the following appears on Revolution-Green and appears to offer a theoretical foundation for the earlier claims. Maybe DoD turned it into a black project but how do you weaponize a heat pipe? Scientists predict state of matter that can conduct both electricity and energy perfectly - Revolution-Green | | | | | | | | | | | Scientists predict state of matter that can conduct both electricity and... Black Phosphorous Tunnel Field-Effect Transistor as an Alternative Ultra-low Power Switch Researchers develop h... | | |