This lesson covers the concepts of throttling and turbine processes in thermodynamics. It delves into the specifics of refrigerant 134a being throttled at different pressures and temperatures, and the assumptions made during this process. The lesson also explains how to determine the specific reversible work and exergy destroyed during the throttling process. Furthermore, it discusses the adiabatic turbine process involving steam, where the power output of the turbine and the reversible power output are calculated. The lesson concludes with the calculation of the second law efficiency.

- Throttling is assumed to be adiabatic if the heat loss from the throttle valve is not given.
- The specific reversible work and exergy destroyed during the throttling process can be determined.
- The adiabatic turbine process involves calculating the power output of the turbine and the reversible power output.
- The second law efficiency can be calculated by dividing the actual work done by the reversible power.
- The kinetic energy change is included in the calculation of the reversible work.

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