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0.1 kg/s of saturated liquid water enters an adiabatic reversible pump at 10 kPa and exits...
Water is the working fluid in a Rankine cycle. Superheated vapor enters the turbine at 10...
Water is the working fluid in a Rankine cycle. Superheated vapor enters the turbine at 10 Mpa, 560 C with a mass flow rate of 7.8kg/s and exits at 8 kPa. Saturated liquid enters the pump at 8 kPa. The isentropic turbine efficiency is 85%, and the isentropic pump efficiency is 85%. Cooling water enters the adiabatic condenser at 18 C and exits at 36 C with no significant change in pressure and assuming the specific heat of the cooling...
0.1 kg/s of R-134 enters a throttle valve as a saturated liquid at 60◦C, and exits...
0.1 kg/s of R-134 enters a throttle valve as a saturated liquid at 60◦C, and exits at 90 kPa. Calculate the rate of entropy generation.
6. Refrigerant-134a enters an adiabatic compressor as saturated vapor at 100 kPa at a rate of...
6. Refrigerant-134a enters an adiabatic compressor as saturated vapor at 100 kPa at a rate of 0.7 m3/min and exits at 1 MPa pressure. If the isentropic efficiency of the compressor is 87%, determine (a) the temperature of the refrigerant at the exit of the compressor, (b) the power input (in kW), and (c) the rate of entropy generation during this process.
In a steam power plant, water is pressurized in an adiabatic pump from 100kPa as a saturated liqu...
In a steam power plant, water is pressurized in an adiabatic pump from 100kPa as a saturated liquid to 5 MPa at 150C. The pump is directly driven by an adiabatic steam turbine, which also powers a generator. Steam enters the steam turbine at 5 MPa and 450C and leaves as saturated vapor at 100kPa. Determine the net-work output of the pump-turbine-generator combination if the generator operates at 85% efficiency. (in kJ/kg) ) b) Determine the entropy generation for both...
Liquid water at 120 kPa enters a 7 kW pump where its pressure is raised to...
Liquid water at 120 kPa enters a 7 kW pump where its pressure is raised to 4.7 MPa. If the elevation difference between the exit and the inlet levels is 10 m, determine the highest mass flow rate of liquid water this pump can handle. Neglect the kinetic energy change of water, and take the specific volume of water to be 0.001 m3/kg The highest mass flow rate of liquid water is kg/s
5-30 Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 30 m/s and leaves...
5-30 Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 30 m/s and leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm². Determine (a) the mass flow rate through the nozzle, (b) the exit temperature of the air, and (c) the exit area of the nozzle. Answers: (a) 0.5304 kg/s, (b) 184.6°C, (c) 38.7 cm P = 300 kPa T, = 200°C Vi = 30 m/s A = 80 cm AIR...
Water at 600ºC, 10 MPa enters the “hot” side of a well-insulated heat exchanger with a...
Water at 600ºC, 10 MPa enters the “hot” side of a well-insulated heat exchanger with a flowrate of 0.1 kg/s and exits as saturated liquid. Water enters the “cold” side of the heat exchanger at 10ºC, 100 kPa with a flowrate of 0.5 kg/s. Find (a) the rate of heat transfer (in kW) between the two fluids and (b) the exit temperature of the cold water (in ºC).
4. Water is the working fluid in a Carnot vapor power cycle. Saturated liquid enters the...
4. Water is the working fluid in a Carnot vapor power cycle. Saturated liquid enters the boiler at 16 MPa, and saturated vapor enters the turbine. The condenser pressure is 8 kPa. The mass flow rate of steam entering the turbine is 120 kg/s. Determine (a) the thermal efficiency. (b) the back work ratio. (c) the net power developed, in kW. (d) the rate of heat transfer from the working fluid passing through the condenser, in kW.
Saturated liquid water at 10 kPa leaves the condenser of a steam power plant and is...
Saturated liquid water at 10 kPa leaves the condenser of a steam power plant and is pumped to the boiler pressure of 5 MPa. Calculate the work for an isentropic pumping process in kJ/kg.
2. STEAM enters a reversible, adiabatic turbine at 6.0 MPa and 500 C. It leaves at...
2. STEAM enters a reversible, adiabatic turbine at 6.0 MPa and 500 C. It leaves at 10 kPa. The mass flow rate is 40 kg/s. What is the power output of the turbine in kW? (Hints: W_dot = m_dot (h_2-h _1) and s_1=s_2). a) 1243 kW b) 2663 kW c) 33,570 kW d) 41,000 kW e) 49.725 kW
6. Refrigerant-134a enters an adiabatic compressor as saturated vapor at 100 kPa at a rate of 0.7 m3/min and exits at 1 MPa pressure. If the isentropic efficiency of the compressor is 87%, determine (a) the temperature of the refrigerant at the exit of the compressor, (b) the power input (in kW), and (c) the rate of entropy generation during this process.
In a steam power plant, water is pressurized in an adiabatic pump from 100kPa as a saturated liquid to 5 MPa at 150C. The pump is directly driven by an adiabatic steam turbine, which also powers a generator. Steam enters the steam turbine at 5 MPa and 450C and leaves as saturated vapor at 100kPa. Determine the net-work output of the pump-turbine-generator combination if the generator operates at 85% efficiency. (in kJ/kg) ) b) Determine the entropy generation for both...
Liquid water at 120 kPa enters a 7 kW pump where its pressure is raised to 4.7 MPa. If the elevation difference between the exit and the inlet levels is 10 m, determine the highest mass flow rate of liquid water this pump can handle. Neglect the kinetic energy change of water, and take the specific volume of water to be 0.001 m3/kg The highest mass flow rate of liquid water is kg/s
5-30 Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 30 m/s and leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm². Determine (a) the mass flow rate through the nozzle, (b) the exit temperature of the air, and (c) the exit area of the nozzle. Answers: (a) 0.5304 kg/s, (b) 184.6°C, (c) 38.7 cm P = 300 kPa T, = 200°C Vi = 30 m/s A = 80 cm AIR...
4. Water is the working fluid in a Carnot vapor power cycle. Saturated liquid enters the boiler at 16 MPa, and saturated vapor enters the turbine. The condenser pressure is 8 kPa. The mass flow rate of steam entering the turbine is 120 kg/s. Determine (a) the thermal efficiency. (b) the back work ratio. (c) the net power developed, in kW. (d) the rate of heat transfer from the working fluid passing through the condenser, in kW.
2. STEAM enters a reversible, adiabatic turbine at 6.0 MPa and 500 C. It leaves at 10 kPa. The mass flow rate is 40 kg/s. What is the power output of the turbine in kW? (Hints: W_dot = m_dot (h_2-h _1) and s_1=s_2). a) 1243 kW b) 2663 kW c) 33,570 kW d) 41,000 kW e) 49.725 kW
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