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MECHANICAL ENGINEERING DEPARTMENT ?? 203: THERMODYNAMICS I HW # 9 PROBLEMS Material to cover: Ch. 7B 1. Steam is condensed in a steam power plant at a pressure of 10 kPa and boiled at a pressure of 5 MPa. Assuming that the complete cycle is reversible, steam leaves the turbine as saturated vapor, the working fluid enters the pump as saturated liquid and the heat losses from the pump and the turbine are negligible, determine: a. the turbine work per unit mass, in kJ/kg. b. the pump work per unit mass, in kJ/kg. c. the ratio of turbine to pump work.

          MECHANICAL ENGINEERING DEPARTMENT
?? 203: THERMODYNAMICS I
HW # 9 PROBLEMS
Material to cover: Ch. 7B
1. Steam is condensed in a steam power plant at a pressure of 10 kPa and boiled at a pressure
of 5 MPa. Assuming that the complete cycle is reversible, steam leaves the turbine as
saturated vapor, the working fluid enters the pump as saturated liquid and the heat losses
from the pump and the turbine are negligible, determine:
a. the turbine work per unit mass, in kJ/kg.
b. the pump work per unit mass, in kJ/kg.
c. the ratio of turbine to pump work.

Show more…

MECHANICAL ENGINEERING DEPARTMENT
?? 203: THERMODYNAMICS I
HW # 9 PROBLEMS
Material to cover: Ch. 7B
1. Steam is condensed in a steam power plant at a pressure of 10 kPa and boiled at a pressure
of 5 MPa. Assuming that the complete cycle is reversible, steam leaves the turbine as
saturated vapor, the working fluid enters the pump as saturated liquid and the heat losses
from the pump and the turbine are negligible, determine:
a. the turbine work per unit mass, in kJ/kg.
b. the pump work per unit mass, in kJ/kg.
c. the ratio of turbine to pump work.

Added by Benjamin P.

University Physics with Modern Physics

Hugh D. Young 14th Edition

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Solved by Expert Prabhu Ramji

Step 1

- At Pcond = 10 kPa (0.01 MPa): hf = 191.81 kJ/kg, vg (not needed), vg?; saturated-vapor enthalpy hg(0.01 MPa) = 2583.9 kJ/kg, vf = 0.00101 m^3/kg. - At Pboil = 5 MPa: saturated-vapor enthalpy hg(5 MPa) = 2799.5 kJ/kg. (Values taken from standard steam tables.) Show more…

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MECHANICAL ENGINEERING DEPARTMENT ME 203: THERMODYNAMICS HW #9 PROBLEMS Material to cover: Ch.7B 1. Steam is condensed in a steam power plant at a pressure of 10 kPa and boiled at a pressure of 5 MPa. Assuming that the complete cycle is reversible, steam leaves the turbine as saturated vapor, the working fluid enters the pump as saturated liquid, and the heat losses from the pump and the turbine are negligible. Determine: a. The turbine work per unit mass, in kJ/kg. b. The pump work per unit mass, in kJ/kg. c. The ratio of turbine to pump work.

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