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1 kg/s of steam with P = 1 MPa and x = 50% enters is expanded through a valve to 100 kPa. Find th...
S Q. Find the entropy and/or temperature of steam at the following states Region k/kg K) 5 MPa 1 ...
s Q. Find the entropy and/or temperature of steam at the following states Region k/kg K) 5 MPa 1 MPa 18 MPa 400°C 40 kPa 40 kPa 120°C 50°C Quality, x-09, Mixed 71794 (<7.6700) Q. Determine the entropy change of water contained in a closed system as it changes phase rom saturated liquid to saturated vapor when the pressure is 0.1MPa and constant Why is the entropy change positive for this process? 2. Steam at 1 MPa, 6000C expands in...
Steam Generator air (inlet) - 320°C P. = 100 kPa th =0.5 kg/s heat exchanger -...
Steam Generator air (inlet) - 320°C P. = 100 kPa th =0.5 kg/s heat exchanger - water (inlet) T = 20°C Pw = 100 kPa m = 0.025 kg/s Problem sketch Solve with EES. Document all necessary balances The problem sketch illustrates a heat exchanger in which hot air is used to generate steam. Air enters the heat exchanger at 1a, in = 320C, Pa = 100 kPa, and ma -0.5 kg/s. Model air as an ideal gas with constant...
Nitrogen is expanded from 2000 kPa and 500°C to 100 kPa and 50°C. Assuming constant specific...
Nitrogen is expanded from 2000 kPa and 500°C to 100 kPa and 50°C. Assuming constant specific heats, determine the change in the specific entropy of Nitrogen A. -0.0478 kJ/kgK B.-0.0175 kJ/kg C. 0.0175 kJ/kgK D. -1.503 kJ/kgK
a turbine enters steam through a 0.2 duct m in diameter The steam velocity is 100...
a turbine enters steam through a 0.2 duct m in diameter The steam velocity is 100 m / s, its pre Sion is 14 MPa, and its temperature is 600 ° C. The steam leaves the turbine through a 0.8 m diameter duct with a pressure of 500 kPa and a temperature of 180 ° C. For the operation in a stationary situation, determine: (a) The steam velocity at the outlet, in m / s. (b) The mass flow of...
Steam enters an adiabatic turbine steadily at 7 MPa, 500 °C, and 45 m/s
Steam enters an adiabatic turbine steadily at 7 MPa, 500 °C, and 45 m/s, and leaves at 100 kPa and 75 m/s. If the power output of the turbine is 5 MW and the isentropic efficiency is 77 percent, determine: A. the mass flow rate of steam through the turbine, B. the temperature at the turbine exit, and C. the rate of entropy generation during this process.
Cv Btu/lbm PR 400 8. Steam enters a turbine at 500 ' reversibly to 100 kPa....
Cv Btu/lbm PR 400 8. Steam enters a turbine at 500 ' reversibly to 100 kPa. What is the power output of the turbine? (11 pts) C and 5 MPa at 1 kg/s. The water is expanded adiabatically and
1. (20 points) Consider a cogeneration system operating at steady state. Superheated steam enters the first...
1. (20 points) Consider a cogeneration system operating at steady state. Superheated steam enters the first turbine stage at 6 MPa, 540 °C. Between the first and second stages, 45% of the steam is extracted at 500 kPa and diverted to a process heating load of 5 x 108 kl/h. Condensate exits the process heat exchanger at 450 kPa with specific enthalpy of 589.13 kl/kg and is mixed with liquid exiting the lower pressure pump at 450 kPa. The entire...
1. (20 points) Consider a cogeneration system operating at steady state. Superheated steam enters the first...
1. (20 points) Consider a cogeneration system operating at steady state. Superheated steam enters the first turbine stage at 6 MPa, 540 °C. Between the first and second stages, 45% of the steam is extracted at 500 kPa and diverted to a process heating load of 5 x 108 kl/h. Condensate exits the process heat exchanger at 450 kPa with specific enthalpy of 589.13 kl/kg and is mixed with liquid exiting the lower pressure pump at 450 kPa. The entire...
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...
2. Hot air at 1.0 MPa and o0o "C enters to a circular cross section nozzle and is expanded to to ...
2. Hot air at 1.0 MPa and o0o "C enters to a circular cross section nozzle and is expanded to to a circul 6 MPa isentropically. For a throat diameter of 10 mm, find: a. The type of nozzle required b. The velocity of flow at the exit c. Temperature of flow at the exit d. Velocity of flow at the throat e. Mass flow rate through the nozzle Assume k 1.40, cp 1.004 kJ/kgK, c0.717 kJ/kgK, R-287 J/kgK for...
s Q. Find the entropy and/or temperature of steam at the following states Region k/kg K) 5 MPa 1 MPa 18 MPa 400°C 40 kPa 40 kPa 120°C 50°C Quality, x-09, Mixed 71794 (<7.6700) Q. Determine the entropy change of water contained in a closed system as it changes phase rom saturated liquid to saturated vapor when the pressure is 0.1MPa and constant Why is the entropy change positive for this process? 2. Steam at 1 MPa, 6000C expands in...
Steam Generator air (inlet) - 320°C P. = 100 kPa th =0.5 kg/s heat exchanger - water (inlet) T = 20°C Pw = 100 kPa m = 0.025 kg/s Problem sketch Solve with EES. Document all necessary balances The problem sketch illustrates a heat exchanger in which hot air is used to generate steam. Air enters the heat exchanger at 1a, in = 320C, Pa = 100 kPa, and ma -0.5 kg/s. Model air as an ideal gas with constant...
Nitrogen is expanded from 2000 kPa and 500°C to 100 kPa and 50°C. Assuming constant specific heats, determine the change in the specific entropy of Nitrogen A. -0.0478 kJ/kgK B.-0.0175 kJ/kg C. 0.0175 kJ/kgK D. -1.503 kJ/kgK
Cv Btu/lbm PR 400 8. Steam enters a turbine at 500 ' reversibly to 100 kPa. What is the power output of the turbine? (11 pts) C and 5 MPa at 1 kg/s. The water is expanded adiabatically and
1. (20 points) Consider a cogeneration system operating at steady state. Superheated steam enters the first turbine stage at 6 MPa, 540 °C. Between the first and second stages, 45% of the steam is extracted at 500 kPa and diverted to a process heating load of 5 x 108 kl/h. Condensate exits the process heat exchanger at 450 kPa with specific enthalpy of 589.13 kl/kg and is mixed with liquid exiting the lower pressure pump at 450 kPa. The entire...
1. (20 points) Consider a cogeneration system operating at steady state. Superheated steam enters the first turbine stage at 6 MPa, 540 °C. Between the first and second stages, 45% of the steam is extracted at 500 kPa and diverted to a process heating load of 5 x 108 kl/h. Condensate exits the process heat exchanger at 450 kPa with specific enthalpy of 589.13 kl/kg and is mixed with liquid exiting the lower pressure pump at 450 kPa. The entire...
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...
2. Hot air at 1.0 MPa and o0o "C enters to a circular cross section nozzle and is expanded to to a circul 6 MPa isentropically. For a throat diameter of 10 mm, find: a. The type of nozzle required b. The velocity of flow at the exit c. Temperature of flow at the exit d. Velocity of flow at the throat e. Mass flow rate through the nozzle Assume k 1.40, cp 1.004 kJ/kgK, c0.717 kJ/kgK, R-287 J/kgK for...
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