Application of Thermodynamics on Insulator Vertical Piston Cylinder — Lesson 3

This lesson covers the concept of thermodynamics, specifically focusing on the insulator vertical piston cylinder device. It explains how the device initially contains 15 kg of water, with 9 kg in vapor form, and maintains a constant pressure of 200 kilopascals. The lesson further discusses the process of steam entering the cylinder, leading to vaporization until all the liquid in the cylinder is vaporized. It also explains how the piston moves up due to the steam coming in, maintaining the pressure. The lesson concludes by calculating the entropy generated due to the irreversible process. For instance, it uses a real-world example of a piston cylinder arrangement to illustrate the concepts.

Video Highlights

00:38 - Drawing and explanation of the pressure and mass in the device
06:28 - Explanation of the energy equation and the displacement work
10:18 - Explanation of the entropy balance and the rate of entropy generation
17:12 - Solution to the problem using the control volume first law
25:16 - Calculation of the exergy destruction

Key Takeaways

- The piston in an insulator vertical piston cylinder maintains a constant pressure of 200 kilopascals.
- The steam enters the cylinder, leading to the vaporization of all the liquid in the cylinder.
- The properties like enthalpy, internal energy, and entropy can be calculated using steam tables.
- The energy equation and entropy balance play a crucial role in understanding the system's behavior.