Thermo 6.1 - Second Law of Thermodynamics; Heat Engine; Kelvin-Planck Statement

In this segment, we start discussing the 2nd law of thermodynamics. We illustrate that processes have directions. Before covering the Kelvin-Planck Statement, we discuss thermal reservoirs (essentially heat source and heat sink) and introduce a heat engine. We go over the boiler, pump, turbine, and condenser components of a steam power plant and derive the thermal efficiency. At last, we introduce the Kelvin-Planck Statement of 2nd law, which states it is impossible for any device operating on a cycle to receive heat from a reservoir and produce a net amount of work. This material is based upon work supported by the National Science Foundation under Grant No. 2019664. Any opinions, findings, and conclusions, or recommendations expressed in this material are those of the author and do not necessarily reflect the views of the National Science Foundation.

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