FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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There are required 2000 kW of compressor power to handle air adiabaticallyfrom 1 atmosphere, 27 oC, to 305 kPaa. The initial air velocity is 20 m/s and the finalvelocity is 85 m/s.
a) If the compression is isentropic, find the compressor capacity, inm3/s.
b) If the compression process is irreversible adiabatic to a temperature of 160 oC,with the capacity found in
c), determine the compressor power input, in Hp.
A one-stage compressor takes air at 100kpa and 25C with volume flow of 0.123m3/s and discharges to 800kpa. What is the heat rejected(kw) by the intercooler?
A single-stage single acting air compressor takes air in at 1 bar & delivers at 6.5 bar. Work done by the compressor is 36 kJ and the compressor runs at 150 rpm. Calculate the power required in kW.
the power required in kW.
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- an air flow is brought from 20 degree celsius, 100 kPa to 1000 kPa, 330 degree celsius by an adiabatic compressor driven by 50 kW motor. what are the mass flow rate and the exit volume flow rate of air?arrow_forwardIf the mass flow rate for air is 5 Kg/s .and air compressor takes in air at 200 kPa, 290 K and delivers it at 1.2 MPa, 600 K to a constant-pressure cooler, which it exits at 300 K. Take cp= 1.005 find 1- temperature exit for compressor is A- 290 K B- 600 K C - 300 K 2- work specific compressor is A- ( -211.55) B- ( -311.55) C- ( -411.55) 3- Specific heat transfer in the cooler is A- 301.5 B- 310.5 C- 320.5 4- Power the compressor is A- 1575.75 B- 1585.75 C- 1895.75arrow_forwardWater Vapor pressure 8 MPa and 350 in an adiabatic turbineIt enters at a temperature of oC and at a pressure of 750 kPacomes out. Reversible The amount of work done by the unit mass of steam for the processcalculate.arrow_forward
- A turbine operating in a continuous flow works adiabatically. The water vapor enters the turbine at a temperature of 650 C and comes out with 20 kPa pressure and 85% dryness. Find the mass flow rate (kg / sec) required to generate 10 MW of power from the system (ignore KE and PE changes)arrow_forwardAir enters an insulated compressor at ambient conditions, 100 kPa, 20oC at the rate of0.2 kg/s and exits at 500 K. The isentropic efficiency of the compressor is 70%. Whatis the exit pressure? How much power is required to drive the compressor? Assumespecific heats at room temperatures.arrow_forwardA-A nozzle should produce a flow of air with 200 m/s at 20°C, 100 kPa (exit condition). It is estimated that the nozzle has an isentropic efficiency of 92%. Calculate the inlet air conditions, assuming that the inlet kinetic energy is negligible. B- 1kg of air at 10bar and 125°C receives heat at constant pressure until its temperature become 650°C, its then expands adiabatically to pressure of 1bar. Determine the change of entropy during each process and the final air temperature.arrow_forward
- A 5 m3rigid tank has propane at 500 kPa, 700 K and connected by a valve to another tank of 0.7 m3with propane at 350 kPa, 600 K. The valve is opened and the two tanks come to a uniform state at 350 K. What is the final pressure?For propane R = 0.1886 kJ/kgKarrow_forwardThe power required for the compressor, to handle air adiabatically from 101.325kPaa and 300 °K to 305 kPaa, 2550 Hp. The inlet velocity is 21 m/s and the dischargevelocity of air is 85 m/s. a) If the process is isentropic, find the volume of air handles,in lps, measured at inlet conditions. b) If the compression is irreversible adiabatic totemperature 157.5 °C, with the capacity obtained in a), find the power input.arrow_forwardTwo-stage compressor that has an intercooler takes in air at 300 K, 100 kPa, and compresses it at 2.2 MPa. The cooler then reduces the air temperature to 340 K, after which it enters the second stage, where it has an outlet pressure of 15.0 MPa. Both stages are adiabatic and reversible. Determine a) Find the heat q in the cooler b) The total specific workarrow_forward
- During an isentropic process of 3 lb/sec of air, the temperature increases from 50 deg F to 290 deg F. Find the work for a nonflow process. -96012 BTU/s -69012 BTU/s O -123.38 BTU/s O -132.38 BTU/sarrow_forwardThermodynamics sketch and label the turbine. Sketch and label the process on a T-s diagram also mentions all numbers on the process please. Thanks 7.56 A steam turbine has an inlet of 2 kg/s water at 1000 kPa, 400°C with velocity of 15 m/s. The exit is at 100 kPa, 150°C and very low velocity. Find the power produced and the rate of entropy generation.arrow_forward4. An evaporator has R-410A at -20°C and quality 80% flowing in. The exit flow is saturated vapor at -20°C. a. Consider the heating to be a reversible process and find the specific heat transfer from the entropy balance. (Answer: 48.7 kJ/kg) b. If the heat source was at -10°C and the inlet and outlet streams still have the same properties as in a), calculate the specific entropy generation? (Answer: 7.33 J/(kg K))arrow_forward
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