Category scope includes "free energy" concepts and inventions, descriptions of energy inventions that have not yet been successfully demonstrated, concept papers describing potential futuristic technologies that are unrelated to energy technologies now used, articles about energy inventions and R&D efforts that never lived up to the claims that were made for them, and energy technology ideas that are currently considered unorthodox. Many of the concepts described by sites in this category are generally considered to violate the second law of thermodynamics or other laws of physics. Other concepts described here may have merit, but have yet to be successfully demonstrated. Note that symlinks are provided to categories for Cold Fusion and Orgone Energy.
Submit here only sites that produce energy "for free". Sites that describe energy production from unproven sources or extract it by unproven methods should go to the Science/Technology/Energy/Unproven_Concepts category.
Perpetual motion machines either produce more energy than is put into them or convert heat into other forms of energy without warming something cooler than the source of the heat. See http://en.wikipedia.org/wiki/Perpetual_motion_machine for a more detailed explanation.
Submit here only sites that produce energy "for free". Sites that describe energy production from unproven sources or extract it by unproven methods should go to the Science/Technology/Energy/Unproven_Concepts category.