200 kPa pressure and 3 kg of saturated liquid and saturated steam mixture water at 50% degree are in a vertical piston cylinder arrangement. As a result of the heat transfer from the environment to the cylinder, the piston moves by increasing slowly at constant pressure and heat is transferred to the piston-cylinder arrangement until the volume reaches 3 times. Note: Take T (K) = 273.15 + ◦C and ambient temperature 25◦C. a) Draw the T-s diagram of the state change, show the temperature and entropies in the initial and final states on the diagram. b) Find the heat transfer, kj, to the system during the process. c) Find the total amount of entropy, kj / K, produced during this process. d) Consider whether a change of state is possible.
200 kPa pressure and 3 kg of saturated liquid and saturated steam mixture water at 50% degree are in a vertical piston cylinder arrangement. As a result of the heat transfer from the environment to the cylinder, the piston moves by increasing slowly at constant pressure and heat is transferred to the piston-cylinder arrangement until the volume reaches 3 times.
Note: Take T (K) = 273.15 + ◦C and ambient temperature 25◦C.
a) Draw the T-s diagram of the state change, show the temperature and entropies in the initial and final states on the diagram.
b) Find the heat transfer, kj, to the system during the process.
c) Find the total amount of entropy, kj / K, produced during this process.
d) Consider whether a change of state is possible.
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