Sorry to burst your bubble - but ALL energy conversion cycles ultimately end up ( terminate ) by releasing heat ! The energy food chain starts with nuclear fusion ( stars ) and billions of years from now the universe will "die" because there will no longer be any thermal ( potential energy ) differences. The matter is called "entropy" which process is irreversible. ALL sources of energy ( wind, solar, nuclear, fossil fuel, ..... mice in a squirrel cage ) will result in a perceived temperature rise ! Look up "entropy" in a science/thermodynamics text .....