Kevin-Planck Statement
- It is impossible for any device that operates on a cycle to receive heat from a single reservoir and produces a net amount of work.
- This is a statement without proof, but has not been disproved yet.
- Therefore, the question from previous slide is “NO”. It is not possible to built a heat engine that is 100%.
- A heat engine has to reject some energy into a lower temperature sink in order to complete the cycle.
- TH>TL in order to operate the engine. Therefore, the higher the temperature, the higher the quality of the energy source since it can produce useable work to more lower-temperature energy sinks.