- #1
Gear300
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A heat engine is combined with a heat pump so that the entire system is an isolated system. In the heat engine, energy shifts from the hot reservoir so that some of it is used for work and the rest is sent to the cold reservoir. The work, however, is used entirely for the heat pump, in which the heat pump reverts the energy from the work and the energy exhausted to the cold reservoir back to the hot reservoir. Technically, a machine like this is useless (its performing work on itself)...but, while ignoring friction, conduction, or any other unnecessary dissipation of energy, wouldn't this be a perpetual motion machine?