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Problem 3. (40 pts) Shown in the figure is a piston/cylinder set up containing refrigerant R...
Problem 5 A piston-cylinder device, shown below, with a set of stops contains 5 kg of...
Problem 5 A piston-cylinder device, shown below, with a set of stops contains 5 kg of Refrigerant-22. Initially 4 kg of the refrigerant is in the liquid state, and the temperature is -10 C. Now heat is transferred slowly to the refrigerant until it hits the stops, at which point the volume is 200 liters. Determine a) The temperature when the piston first hits the stops b) The work done during this process c) Show this process on a P-v...
1-A piston-cylinder device with a set of stops contains 10 kg of refrigerant-134a. Initially, 8 kg...
1-A piston-cylinder device with a set of stops contains 10 kg of refrigerant-134a. Initially, 8 kg of the refrigerant is in the liquid form, and the temperature is 8°C. Now heat is transferred slowly to the refrigerant until the piston hits the stops, at which point the volume is 400 L. Determine (a) The temperature when the piston first hits the stops and (b) The work done during this expansion process. Also, show the process on a P-V diagram.
QUESTION 3 A 0.25m of saturated liquid refrigerant-134a at 80°C is contained in frictionless insulated piston-cylinder...
QUESTION 3 A 0.25m of saturated liquid refrigerant-134a at 80°C is contained in frictionless insulated piston-cylinder device as shown in Figure Q2(b). A paddle-wheel is placed inside the cylinder chamber to stir the refrigerant-134a and the paddle wheel transfer a total work of 245 kJ to the fluid. Moreover, a 440 V and 9 amp of resistor is also placed inside the cylinder chamber to heat the refrigerant-134a. With the aid of a P-V diagram, determine the time taken for...
(THERMODYNAMICS) A vertical cylinder fitted with a frictionless piston contains 1.5 kg of H2O initially at...
(THERMODYNAMICS) A vertical cylinder fitted with a frictionless piston contains 1.5 kg of H2O initially at 100 °C, 400 kPa. If the volume of the system reaches 0.5 m3, the piston hits a set of stops and is restrained from further upward travel. The system is heated to 200 °C. (Use saturated water tables, steam tables, and superheated tables as necessary) a) If the piston reaches the stops, determine the temperature and pressure when the piston first touches but exerts no force...
A cylinder fitted with a frictionless piston contains stops arranged as shown in the following figure....
A cylinder fitted with a frictionless piston contains stops
arranged as shown in the following figure. When the piston rests on
the lower stops the volume is 0.4m3 ; when it is in contact with
the upper stops the volume is 0.6m3 . If the piston is not in
contact with the stops, it maintains a constant pressure of 200kPa
in the cylinder. Initially, the cylinder contains air at P1=150kPa
with a temperature of T1=300K. The air is then heated...
Homework 2 Problem 1: A piston-cylinder device initially contains 0.35-kg steam at 3.5 MPa, superheated by...
Homework 2 Problem 1: A piston-cylinder device initially contains 0.35-kg steam at 3.5 MPa, superheated by 7.4 C. Now the stream 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 (a) the final pressure and the quality (if mixture), (b) the boundary work, (c) the amount of heat transfer when the piston first hits...
Problem 7.023 SI As shown in the figure below, 1.25 kg of refrigerant R-134a is contained...
Problem 7.023 SI As shown in the figure below, 1.25 kg of refrigerant R-134a is contained in a well-insulated piston-cylinder assembly fitted with an electrical resistor of negligible mass. The refrigerant is initially at 2 bar and a quality of 50%. The resistor is activated until the volume of the refrigerant doubles, while its pressure varies negligibly. Determine, in kJ (a) the amount of energy transfer by work to the piston and (b) the accompanying exergy transfer. (c) the amount...
2. A piston-cylinder device maintain a constant pressure of 800 kPa while containing 20 kg of...
2. A piston-cylinder device maintain a constant pressure of 800 kPa while containing 20 kg of saturated water vapor. The system is heated with a resistance heater for 10 min at a current of 8 A at the standard wall voltage of 120 V. In that time, 3.2 kJ of heat is lost through the walls. What is the temperature at the heated state? 3 5-18E Hydrogen is contained in a piston-cylinder device at 14.7 psia and 15 ft. At...
Problem 2. As shown in the figure, a gas contained within a piston-cylinder assembly, initially at...
Problem 2. As shown in the figure, a gas contained within a piston-cylinder assembly, initially at a volume of 0.1 m3, undergoes a constant-pressure expansion at 2 bar to a final volume of 0.12 m3, while being slowly heated through the base. The change in internal energy of the gas is 0.25 kJ. The piston and cylinder walls are fabricated fronm heat-resistant material, and the piston moves smoothly in the cylinder. The local atmospheric pressure is 1 bar. (a) For...
3. (40 pts.) A vertical cylinder fitted with a frictionless piston contains 10 kg of Water...
3. (40 pts.) A vertical cylinder fitted with a frictionless piston contains 10 kg of Water at 0.1 MPa and x = 40%. The system is heated by an external source at 227°C until the specific volume reaches 2.24 m3/kg. The weight of the piston is such that it takes a water pressure of 0.2 MPa for it to start rising 4 (a) Identify the system and draw its boundary (b) Sketch and annotate the overall process on a P-v...
Problem 5 A piston-cylinder device, shown below, with a set of stops contains 5 kg of Refrigerant-22. Initially 4 kg of the refrigerant is in the liquid state, and the temperature is -10 C. Now heat is transferred slowly to the refrigerant until it hits the stops, at which point the volume is 200 liters. Determine a) The temperature when the piston first hits the stops b) The work done during this process c) Show this process on a P-v...
1-A piston-cylinder device with a set of stops contains 10 kg of refrigerant-134a. Initially, 8 kg of the refrigerant is in the liquid form, and the temperature is 8°C. Now heat is transferred slowly to the refrigerant until the piston hits the stops, at which point the volume is 400 L. Determine (a) The temperature when the piston first hits the stops and (b) The work done during this expansion process. Also, show the process on a P-V diagram.
QUESTION 3 A 0.25m of saturated liquid refrigerant-134a at 80°C is contained in frictionless insulated piston-cylinder device as shown in Figure Q2(b). A paddle-wheel is placed inside the cylinder chamber to stir the refrigerant-134a and the paddle wheel transfer a total work of 245 kJ to the fluid. Moreover, a 440 V and 9 amp of resistor is also placed inside the cylinder chamber to heat the refrigerant-134a. With the aid of a P-V diagram, determine the time taken for...
A cylinder fitted with a frictionless piston contains stops
arranged as shown in the following figure. When the piston rests on
the lower stops the volume is 0.4m3 ; when it is in contact with
the upper stops the volume is 0.6m3 . If the piston is not in
contact with the stops, it maintains a constant pressure of 200kPa
in the cylinder. Initially, the cylinder contains air at P1=150kPa
with a temperature of T1=300K. The air is then heated...
Homework 2 Problem 1: A piston-cylinder device initially contains 0.35-kg steam at 3.5 MPa, superheated by 7.4 C. Now the stream 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 (a) the final pressure and the quality (if mixture), (b) the boundary work, (c) the amount of heat transfer when the piston first hits...
Problem 7.023 SI As shown in the figure below, 1.25 kg of refrigerant R-134a is contained in a well-insulated piston-cylinder assembly fitted with an electrical resistor of negligible mass. The refrigerant is initially at 2 bar and a quality of 50%. The resistor is activated until the volume of the refrigerant doubles, while its pressure varies negligibly. Determine, in kJ (a) the amount of energy transfer by work to the piston and (b) the accompanying exergy transfer. (c) the amount...
2. A piston-cylinder device maintain a constant pressure of 800 kPa while containing 20 kg of saturated water vapor. The system is heated with a resistance heater for 10 min at a current of 8 A at the standard wall voltage of 120 V. In that time, 3.2 kJ of heat is lost through the walls. What is the temperature at the heated state? 3 5-18E Hydrogen is contained in a piston-cylinder device at 14.7 psia and 15 ft. At...
Problem 2. As shown in the figure, a gas contained within a piston-cylinder assembly, initially at a volume of 0.1 m3, undergoes a constant-pressure expansion at 2 bar to a final volume of 0.12 m3, while being slowly heated through the base. The change in internal energy of the gas is 0.25 kJ. The piston and cylinder walls are fabricated fronm heat-resistant material, and the piston moves smoothly in the cylinder. The local atmospheric pressure is 1 bar. (a) For...
3. (40 pts.) A vertical cylinder fitted with a frictionless piston contains 10 kg of Water at 0.1 MPa and x = 40%. The system is heated by an external source at 227°C until the specific volume reaches 2.24 m3/kg. The weight of the piston is such that it takes a water pressure of 0.2 MPa for it to start rising 4 (a) Identify the system and draw its boundary (b) Sketch and annotate the overall process on a P-v...
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