Answered: a) W and W p , b) Q A and Q R , c)…

Engineering

Mechanical Engineering

a) W and W p , b) Q A and Q R , c) thermal efficiency of the cycle and engine,

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter3: Refrigeration And Refrigerants

Section: Chapter Questions

Problem 2RQ: What are the approximate temperature ranges tor low-, medium-, and high-temperature refrigeration...

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What are the approximate temperature ranges tor low-, medium-, and high-temperature refrigeration applications?
Solve neatly and write legibly. show diagrams Indicate reference used to determine the properties of water Steam enters a reheat-regenerative turbine at 6 MPa and 400 o C. After partial expansion to 1.24 MPa the steam is withdrawn and passed through a reheater until temperature is 350 o C. Steam then re-enters the turbine at 0.22 MPa where m 1 is extracted for feedwater heating. Remaining steam expands to a condenser pressure of 0.015 MPa. On the basis of 1 kg throttled steam, find: a) steam rate of the cycle and engine, b.) heat rate
Provide a complete given and computation. Include all the decimals. Consider a water-ammonia binary vapor cycle consisting. In the steam cycle, superheated vapor enters the turbine at 7 MPa, 450oC, and saturated liquid exits the condenser at 55oC. The heat rejected from the steam cycle is provided to the ammonia cycle, producing saturated vapor at 45oC, which enters the ammonia turbine. Saturated liquid leaves the ammonia condenser at 1 MPa. For a net power output of 24 MW from the binary cycle, determine (a) the mass flow rates for the steam and ammonia cycles, respectively, in kg/s, (b) the power output of the steam and ammonia turbines, respectively, in MW. (c) the rate of heat input to the ammonia cycle, in MW,
Provide a complete given and computation. Include all the decimals. Consider a water-ammonia binary vapor cycle consisting. In the steam cycle, superheated vapor enters the turbine at 7 MPa, 450oC, and saturated liquid exits the condenser at 55oC. The heat rejected from the steam cycle is provided to the ammonia cycle, producing saturated vapor at 45oC, which enters the ammonia turbine. Saturated liquid leaves the ammonia condenser at 1 MPa. For a net power output of 24 MW from the binary cycle, determine (a) the rate of heat addition to the binary cycle, in MW, and (b) the thermal efficiency of the binary vapor cycle.
Problem 2 – Heat Pump Thermodynamic Analysis Refrigerant-134a enters the condenser of a residential heat pump at 800 kPa and 50°C at a rate of 35 L/min and leaves at 750 kPa subcooled by 3°C. The refrigerant enters the compressor at 200 kPa superheated by 3°C. Neglecting changes in kinetic and potential energy and any stray heat transfer, please answer the following. a. Create a schematic of the cycle, use the same numbers used in your textbook for the inlet and exit states of each device, and include the energy exchanges between the cycle devices and the surroundings. b. Sketch the cycle processes on a T-s diagram. c. Determine the isentropic efficiency of the compressor. d. Compute the rate of heat supplied to the heated room. e. Determine the COP of the heat pump.
Q2) The following data relate to a regenerative steam power plant generating 22500 kW energy, the alternator directly coupled to steam turbine : Condition of steam supplied to the steam turbine 60 bar, 450 degrees * C Condenser vacuum ... 707.5 mm Pressure at which steam is bled from the steam turbine ... 3 bar Turbine efficiency of each portion of expansion ... 87 per cent Boiler efficiencyper cent Alternator efficiency ... 94 per cent Mechanical efficiency from turbine to generator ... 97 per cent Neglecting the pump work in calculating the input to the boiler, determine (i) The steam bled per kg of steam supplied to the turbine. (ii) The steam generated per hour if the 9 percent of the generator output is used to run the pumps. (iiiThe overall efficiency of the plant.
Problem # 2: In a steam thermal plant, it operates with a condenser outlet temperature of 180 ° F, and a boiler outlet temperature of 1000 ° F. If the pressure at the pump outlet is 300 psia. If the efficiencies of the turbine and pump are 85%. Determine: a.) The real work of the turbine, in Btu / Ibm. b.) The actual work of the pump, in Btu / Ibm. c.) The thermal efficiency of the real cycle. d.) The thermal efficiencies of the ideal cycle and Carnot. e.) Diagram T vs s, with all possible values and indicating the real and ideal cycles.
1. A steam power plant operates on Rankine cycle. The steam enters the turbine at 7MpA and 550 degrees celsius with a velocity of 30m/s. It discharges to the condenser at 20kpa with a velocity of 90m/s. For a flow of 37.8 kg/s. Determine: a. The schematic and T-S diagram of the cycle. b. The enthalpies on each state. c. Total Heat added d. Heat rejected in the condenser e. Net work f. Cycle EfficiencyP.S. Please help me with this question. Im having a hard time with this. Thank you very much and please show your solution.
In a steam power plant, the condenser pressure is 10 kPa. The turbine and pump isentropic efficiencies are both 85 %. Draw the schematic and T-S diagrams. Label the points by setting point 1 at the condenser outlet, point 2 at the pump outlet, point 3 at the boiler outlet, and point 4 at the turbine outlet. Use the label 2a and 4a for the points due to the isentropic efficiency of the pump and turbine, respectively. Use 2 decimal places for the enthalpy and other energies in solving and for the final answers. For the steam quality (x) and entropy (s), use 4 decimal places in solving. For the specific volume, use 6 decimal places. The pressure and the temperature of steam that enters the turbine are 4.5 MPa and 800 oC Determine the following: (INPUT YOUR ANSWERS ON THE BLANK SPACES PROVIDED.) Enthalpy at point 1 in kJ/kg = Enthalpy at point 2 in kJ/kg = Enthalpy at point 3 in kJ/kg = Enthalpy at point 4 in kJ/kg = Actual Enthalpy at point 2a in kJ/kg = Actual Enthalpy at point…
In a steam power plant, the condenser pressure is 10 kPa. The turbine and pump isentropic efficiencies are both 85 %. Draw the schematic and T-S diagrams. Label the points by setting point 1 at the condenser outlet, point 2 at the pump outlet, point 3 at the boiler outlet, and point 4 at the turbine outlet. Use the label 2a and 4a for the points due to the isentropic efficiency of the pump and turbine, respectively. Use 2 decimal places for the enthalpy and other energies in solving and for the final answers. For the steam quality (x) and entropy (s), use 4 decimal places in solving. For the specific volume, use 6 decimal places. The pressure and the temperature of steam that enters the turbine are 4 MPa and 700 oC (use the given values assigned on your name in the table below) Determine the following: Enthalpy at point 1 in kJ/kg= Enthalpy at point 2 in kJ/kg = Enthalpy at point 3 in kJ/kg = Enthalpy at point 4 in kJ/kg = Actual Enthalpy at point 2a in kJ/kg= Actual Enthalpy at…
Provide an expert insight about the methods used to increase thermal efficiency of a steam power plant.
Only solve last 2 parts ok Problem 2 – Heat Pump Thermodynamic Analysis Refrigerant-134a enters the condenser of a residential heat pump at 800 kPa and 50°C at a rate of 35 L/min and leaves at 750 kPa subcooled by 3°C. The refrigerant enters the compressor at 200 kPa superheated by 3°C. Neglecting changes in kinetic and potential energy and any stray heat transfer, please answer the following.a. Create a schematic of the cycle, use the same numbers used in your textbook for the inlet and exit states of each device, and include the energy exchanges between the cycle devices and the surroundings.b. Sketch the cycle processes on a T-s diagram.c. Determine the isentropic efficiency of the compressor.d. Compute the rate of heat supplied to the heated room.e. Determine the COP of the heat pump.