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Thermodynamics: 1.1kg/s of steam at 60 MPa and 800°C is to undergo a Joule-Thomson expansion to...

Thermodynamics:

1.1kg/s of steam at 60 MPa and 800°C is to undergo a Joule-Thomson expansion to 1 MPa. The steam coming out of the Joule-Thomson expansion process is fed to the turbine to produce shaft work. Steam exits the turbine at 0.1 MPa and 155°C. Assume that the turbine is steady-state and adiabatic.

a) Does this process violate the second law of thermodynamics?

2.

0.1 m3/s of superheated steam at 1000 kPa and 250oC is travelling through a 10 cm diameter pipe. It expands through a nozzle to 200 kPa. Assuming the process is reversible and adiabatic, determine:

a)The downstream temperature of the steam (Hint: use SB)

b) The downstream quality of the steam

c) The downstream velocity of the steam (Hint: use EB)

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