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1. A rigid vessel contains 7 kg of steam at 0.5 Mpa. After the addition of...
Steam in a 2 m rigid sealed vessel is initially at P,=1 MPa, T.-500 °C. The...
Steam in a 2 m rigid sealed vessel is initially at P,=1 MPa, T.-500 °C. The steam undergoes an isochorie process until the final pressure P2-200 kPa. The specific internal energy and the specific entropy at state 2 are respectively u21092.5 kJ/kg and s2- 3.198 kJ/kg-K. 1 Tsing your stram tahle read the values of the following properties: 4. Compute the mass of steam in the vessel in kg 5. For the system, compute the specific exergy change as, A0-01-02...
A vessel initially contains 5.0 m3 of steam at T = 573.15 K and P =...
A vessel initially contains 5.0 m3 of steam at T = 573.15 K and P = 0.1 MPa. The vessel is sealed but equipped with a piston-cylinder arrangement so that the volume can be changed. If the steam is compressed to 0.5 MPa where the steam quality equals 0.90, determine: a. the final temperature and volume of the system; b. the change in the internal energy of the system. c. Suppose the process is said to happen in adiabatic condition,...
A rigid tank of 0.5 m^3 volume contains wet steam at 80 C and 1% quality....
A rigid tank of 0.5 m^3 volume contains wet steam at 80 C and 1% quality. The tank is then heated until the water inside becomes saturated vapor. Determine the final temperature and pressure within the tank. Answer: 271 C, 5.588MPa.
A piston–cylinder device contains steam initially at 1 MPa, 450°C. Steam is allowed to cool at...
A piston–cylinder device contains steam initially at 1 MPa, 450°C. Steam is allowed to cool at constant pressure until it becomes saturated vapor. Find the internal energy (u) on the initial and final states. Find the specific volume (v) on the initial and final states. Find the boundary work associated with the transformation. Write the conservation of energy equation, and simplify it. Deduce the amount of heat transferred per unit mass. Represent the process on P-v diagram, showing the saturation...
A 3 m^3 container is filled with 6 kg of steam at 0.5 MPa. Describe its...
A 3 m^3 container is filled with 6 kg of steam at 0.5 MPa. Describe its phase and find the temperature, specific and total volume, specific and total internal energy, specific and total enthalpy, and specific and total entropy.
Thermodynamics 1. (correct answer: 0.080595 ) Initially, an insulated rigid tank contains 20 kg of water...
Thermodynamics 1. (correct answer: 0.080595 ) Initially, an insulated rigid tank contains 20 kg of water at 29.5oC and 101 kPa. The tank also contains a 4.86 kg aluminum block at 93.2oC. Using constant specific heats evaluated at 300 K, determine the total entropy production (kJ/K) after an hour assuming thermal equilibrium is achieved. 2. Correct Answer: 8.0087 ± 0.1% Steam at 1 MPa, 593.2oC, expands in a turbine to 0.01 MPa. If the process is isentropic, find the specific...
Problem 5- A piston-cylinder device initially contains steam at 3.5 MPa, superheated by .10°C. Now, steam loses hea...
Problem 5- A piston-cylinder device initially contains steam at 3.5 MPa, superheated by .10°C. Now, steam loses heat to the surroundings and the piston moves down, hitting a set of stops, at which point the cylinder contains saturated liquid water. The cooling continues until the cylinder contains water at .200C. Determine the initial temperature of the steam a. b. Sketch the process on a P-v an T-v diagram Determine the initial specific enthalpy, in kJ/kg d. Determine the enthalpy change...
10 kg of steam is contained at 10 bar in a rigid vessel of volume 2.275...
10 kg of steam is contained at 10 bar in a rigid vessel of volume 2.275 m3. The vessel is cooled until the pressure in the vessel is 7 bar. Calculate the amount of heat removed from the steam.
Question Number 1 (25 Marks) A mass of 0.5 kg of ammonia is contained in a...
Question Number 1 (25 Marks) A mass of 0.5 kg of ammonia is contained in a piston-cylinder assembly, initially at T1 = -20°C and U1 = 391.11 kJ/kg. The ammonia is slowly heated to state 2, where T2 = 20°C and P2 = 0.6 MPa, and the pressure varies linearly with specific volume during this process. From state 2, the system isºcompressed at constant pressure until the ammonia becomes a fully saturated vapor. Assume that there are no significant change...
TURBO MACHINES SUBJECT QUESTION 10 A multi-stage high -pressure steam turbine is supplied with steam at a stagnation pressure of 7 MPa and a stagnation temperature of 500°C. The corresponding specifi...
TURBO MACHINES SUBJECT
QUESTION 10 A multi-stage high -pressure steam turbine is supplied with steam at a stagnation pressure of 7 MPa and a stagnation temperature of 500°C. The corresponding specific enthalpy is 3410kJ.kg. The steam exhaust from the turbine at a stagnation pressure of 0.7 MPa abs., the steam having been in a super-heated condition throughout the expansion. It can be assumed that the steam behaves like a perfect gas over the range of the expansion and that v...
Steam in a 2 m rigid sealed vessel is initially at P,=1 MPa, T.-500 °C. The steam undergoes an isochorie process until the final pressure P2-200 kPa. The specific internal energy and the specific entropy at state 2 are respectively u21092.5 kJ/kg and s2- 3.198 kJ/kg-K. 1 Tsing your stram tahle read the values of the following properties: 4. Compute the mass of steam in the vessel in kg 5. For the system, compute the specific exergy change as, A0-01-02...
A vessel initially contains 5.0 m3 of steam at T = 573.15 K and P = 0.1 MPa. The vessel is sealed but equipped with a piston-cylinder arrangement so that the volume can be changed. If the steam is compressed to 0.5 MPa where the steam quality equals 0.90, determine: a. the final temperature and volume of the system; b. the change in the internal energy of the system. c. Suppose the process is said to happen in adiabatic condition,...
Problem 5- A piston-cylinder device initially contains steam at 3.5 MPa, superheated by .10°C. Now, steam loses heat to the surroundings and the piston moves down, hitting a set of stops, at which point the cylinder contains saturated liquid water. The cooling continues until the cylinder contains water at .200C. Determine the initial temperature of the steam a. b. Sketch the process on a P-v an T-v diagram Determine the initial specific enthalpy, in kJ/kg d. Determine the enthalpy change...
Question Number 1 (25 Marks) A mass of 0.5 kg of ammonia is contained in a piston-cylinder assembly, initially at T1 = -20°C and U1 = 391.11 kJ/kg. The ammonia is slowly heated to state 2, where T2 = 20°C and P2 = 0.6 MPa, and the pressure varies linearly with specific volume during this process. From state 2, the system isºcompressed at constant pressure until the ammonia becomes a fully saturated vapor. Assume that there are no significant change...
TURBO MACHINES SUBJECT
QUESTION 10 A multi-stage high -pressure steam turbine is supplied with steam at a stagnation pressure of 7 MPa and a stagnation temperature of 500°C. The corresponding specific enthalpy is 3410kJ.kg. The steam exhaust from the turbine at a stagnation pressure of 0.7 MPa abs., the steam having been in a super-heated condition throughout the expansion. It can be assumed that the steam behaves like a perfect gas over the range of the expansion and that v...
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