What is the heat of vaporization of water at 1 mpa

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Reference no: EM13249375

1) 70 lbs/hr of steam at 300 psia, 500oF passes through a turbine which expands it to a pressure of 30 psia. If the turbine operates with an efficiency of 70%:

a) What is the temperature of the steam leaving the turbine?

b) What is the quality (% vapor) of the steam leaving the turbine?

c) How much work (Btu/hr) is produced by the steam passing through the turbine?

2) Saturated liquid at 60 psia passes through an insulated vale which reduces its pressure to 25 psia.

a) What is the final temperature?

b) What percentage liquid is in the final mixture?

Use the charts in the skeleton notes for the remaining problems.

3) What is the heat of vaporization of water at 1 MPa?

4) Steam is reversibly and isothermally compressed from 900oC, 0.6 MPa to 400 MPa.

a) How much heat must be removed?

b) What is the concentration of vapor?

5) Air flows into a unit operation at a rate of 1 kg/s at 50 atm, 275oK, and leaves at 1 atm, 150oK.

a) Is this unit operation a compressor or a turbine?

b) What is the rate of electricity produced of consumed by the unit operation?

c) What is its efficiency?

Reference no: EM13249375

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