- #1
Tony Hau
- 104
- 30
So my professor says that the implication of 2nd law of thermodynamics is that high quality energy will be degraded into low quality energy. By high quality energy he means something like coal or fuel. By low quality energy he means something like heat entering the cold resevoir in a heat engine. The logic is that u must need to pump some heat into the cold resevoir for a heat engine. But I am thinking why can't we recycle the heat entering the cold resevoir so that eventually all heat input can be used to give work done, for example by connecting a even cooler resevoir to it.