Question

Problem 1 (34 pts) A piston-cylinder contains water at an intilal tempera- ture of 200°C and a quality of 0.5. The piston is free to move and is initially at rest. Heat is added slowly until the quality reaches 0.9. Determine $v_2$ and $w_2$. Note that $g$ and $w$ are lower case characters. Problem 2 (33 pts) An insulated steam turbine receives steam from two boilers. Steam flow no. 1 is 5 kg/s at 3 MPa and 700°C. Steam flow no. 2 is 10 kg/s at 1 MPa and 400°C. Exit state no. 3 is at 10 kPa. The turbine produces 20 MW power. Find the quality of the exit flow. Neglect changes in elevation and kinetic energy. Problem 3 (33 pts) A rigid container holds 1 kg of water at 20 C with a volume of 0.1 m³. The container is heated until all water becomes saturated vapor. Calculate the final temperature.

          Problem 1 (34 pts)
A piston-cylinder contains water at an intilal tempera-
ture of 200°C and a quality of 0.5. The piston is free to
move and is initially at rest. Heat is added slowly until
the quality reaches 0.9. Determine $v_2$ and $w_2$. Note
that $g$ and $w$ are lower case characters.
Problem 2 (33 pts)
An insulated steam turbine receives steam from two
boilers. Steam flow no. 1 is 5 kg/s at 3 MPa and 700°C.
Steam flow no. 2 is 10 kg/s at 1 MPa and 400°C. Exit
state no. 3 is at 10 kPa. The turbine produces 20 MW
power. Find the quality of the exit flow. Neglect changes
in elevation and kinetic energy.
Problem 3 (33 pts)
A rigid container holds 1 kg of water at 20 C with a volume of 0.1 m³. The container is heated until all water
becomes saturated vapor. Calculate the final temperature.

Problem 1 (34 pts)
A piston-cylinder contains water at an intilal tempera-
ture of 200°C and a quality of 0.5. The piston is free to
move and is initially at rest. Heat is added slowly until
the quality reaches 0.9. Determine v2 and w2. Note
that g and w are lower case characters.
Problem 2 (33 pts)
An insulated steam turbine receives steam from two
boilers. Steam flow no. 1 is 5 kg/s at 3 MPa and 700°C.
Steam flow no. 2 is 10 kg/s at 1 MPa and 400°C. Exit
state no. 3 is at 10 kPa. The turbine produces 20 MW
power. Find the quality of the exit flow. Neglect changes
in elevation and kinetic energy.
Problem 3 (33 pts)
A rigid container holds 1 kg of water at 20 C with a volume of 0.1 m³. The container is heated until all water
becomes saturated vapor. Calculate the final temperature.

Added by Lisa R.

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