The paper claims to generate energy "without a temperature gradient." If there's a hidden temperature gradient somewhere, then the paper is still incorrect. Gi

The paper claims to generate energy "without a temperature gradient." If there's a hidden temperature gradient somewhere, then the paper is still incorrect. Given the extremely small power levels, I expect that if it's not a hidden temperature gradient (eg between local air temperature and local radiant temperature, similar to PV) then they're actually seeing some sort of static electricity or air movement effect.