T S Diagram Homework Clipart

Homework Problems

8B-1 :

Shaft Work and Area on a PV Diagram

3 pts

Calculate the specific shaft work for the process path shown in the PV Diagram, below.

The SISO process is made up of two internally reversible, steady-flow steps in which changes in kinetic and potential energies are negligible. Shaft work and flow work (or PV work) are the only forms of work that cross the system boundary.

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8B-2 :

Shaft Work and Area on a PV Diagram (AE)

3 pts

Calculate the specific shaft work for the process path shown in the PV Diagram, below.

The SISO process is made up of two internally reversible, steady-flow steps in which changes in kinetic and potential energies are negligible. Shaft work and flow work (or PV work) are the only forms of work that cross the system boundary.

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8B-3 :

Shaft Work and Area in the Two-Phase Region of a PV Diagram

3 pts

Calculate the specific shaft work for the process path shown in the PV Diagram, below.

The SISO process is made up of two internally reversible, steady-flow steps in which changes in kinetic and potential energies are negligible. Shaft work and flow work (or PV work) are the only forms of work that cross the system boundary.

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8B-4 :

Shaft Work and Area in the Two-Phase Region of a PV Diagram (AE)

3 pts

Calculate the specific shaft work for the process path shown in the PV Diagram, below.

The SISO process is made up of two internally reversible, steady-flow steps in which changes in kinetic and potential energies are negligible. Shaft work and flow work (or PV work) are the only forms of work that cross the system boundary.

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8B-5 :

Heat Transfer and Area on a PV Diagram

2 pts

The process path for an internally reversible, steady-state, SISO process is shown in the TS Diagram, below.

Determine the specific heat transfer rate in kJ/kg.

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8B-6 :

Heat Transfer and Area on a PV Diagram (AE)

2 pts

The process path for an internally reversible, steady-state, SISO process is shown in the TS Diagram, below.

Determine the specific heat transfer rate in kJ/kg.

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8B-7 :

Heat Transfer and Area on a PV Diagram

2 pts

The process path for an internally reversible, steady-state, SISO process is shown in the TS Diagram, below.

Determine the specific heat transfer rate in kJ/kg.

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8B-8 :

Heat Transfer and Area on a PV Diagram (AE)

2 pts

The process path for an internally reversible, steady-state, SISO process is shown in the TS Diagram, below.

Determine the specific heat transfer rate in kJ/kg.

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8B-9 :

Heat Transfer and Reversibility

3 pts

The process path for a steady-state, SISO process is linear on a TS Diagram. T1, S1} = 324°C, 6.64 kJ/kg-K} and T2, S2} = 107°C,4.33 kJ/kg-K}.During this process, the specific heat transfer is -1100 kJ/kg. Is this process internally reversible, internally irreversible or impossible? Explain your answer.

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8B-10 :

Heat Transfer and Reversibility

3 pts

The process path for a steady-state, SISO process is linear on a TS Diagram. T1, S1} = 345°F, 1.64 Btu/lbm°R} and T2, S2} = 587°F,0.962 Btu/lbm~oR}.During this process, the specific heat transfer is -500 kJ/kg. Is this process internally reversible, internally irreversible or impossible? Explain your answer.

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8B-11 :

Entropy Generation in an Adiabatic Pump

4 pts

Saturated liquidwater enters an adiabatic pump at 100°C and leaves at 5000 kPa and 101°C. The volumetric flow rate is 125 L/min. Determine the rate of entropy generation in kW/K.

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8B-12 :

Entropy Generation in a Real Boiler

3 pts

Water is converted from a saturated liquid to a saturated vapor in a realboiler. In this boiler, friction losses cause the pressure to drop from 800 kPa to 790 kPa. Determine the specific entropy generation for this process.For purposes of the 2nd Law, assume the temperature of the system is constant and uniform and has a value equal to the average of the inlet and outlettemperatures.

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8B-13 :

Entropy Generation in an Adiabatic Compressor (AE)

3 pts

Carbon dioxide enters an adiabatic compressor at 90°F and 20 psia. The CO2 leaves the compressor at 300 psia and 500°F. Determine the molar entropy generation in Btu/lbmol-°R. Is this compressorreversible, irreversible or impossible?

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8B-14 :

Maximum Power Output from a Steam Turbine (AE)

4 pts

High-pressure steam at 600 psia enters an adiabatic turbine at 550°F and leaves at 35 psia. Determine the maximum achievable power output for the turbine in hP if the mass flow rate of steam is 4.2 lbm/s.

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8B-15 :

Water Pump Power Requirement (AE)

4 pts

Water at 70°F is pumped from a reservoir to a water cannon used for fire fighting. The water cannon nozzle is located 200 ftabove the surface of the water in the reservoir. The nozzle outlet has an insidediameter of 2 in.Determine the minimumpumphorsepower required to produce a watervelocity of 125 ft/s at the nozzle outlet.

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8B-16 :

Polytropic Ammonia Compressor

4 pts

Ammoniagas is compressed from 125 kPa and 5°C to 750 kPa in a polytropic process in which δ = 1. Determine the specific power requirment for this compressor and the temperature of the ammonia effluent. Why is this process notisothermal?

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8B-17 :

Polytropic Steam Turbine (AE)

4 pts

Steam expands in a turbine from 700 psia and 1000°F to 40 psia. The expansion is polytropic with δ = 1.32. Determine the specific power and the specific heat transfer of the turbine, in Btu/lbm.

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8B-18 :

Isentropic Compression of Argon Gas

4 pts

Argon gas is compressed isentropically from 125 kPa and 30°C to 1200 kPa. Determine the required power input and heat transfer rate for the compressor if the mass flow rate of argon is 2.7 kg/s.

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8B-19 :

Work and Heat Transfer in a Polytropic Air Compressor

5 pts

Air is compressed continuously from 145 kPa and 45°C to 850 kPa. The process is an internally reversible, polytropic compression with δ = 1.35. The mass flow rate of air is 2.4 kg/s.
a.) Determine the power required for the compressor and the heat transfer rate, both in kW.
b.) Determine the rate of entropy generation in kW/K for the compressor if the surfacetemperature is 105°C.

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8B-20 :

Shaft Work in a Polytropic Ideal Gas Compressor

3 pts

An ideal gas with CP = 21.4 J/mol-K expands from 500 kPa and 300°C to 100 kPa in an internally reversible, adiabatic turbine. Determine the molar shaft work for the turbine.

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T-S DIAGRAM HOMEWORK NAME Geisselle Lopez(20 pts total)The graph on page 2 comes from a field program I was involved with in the EasternPacific. Ocean probes descended into the ocean measuring both temperature and salinity.The left panel shows temperature versus depth while the right panel shows salinity versusdepth. These readings were taken at a latitude of 8 ½ degrees North and 97 degrees Weston September 13, 2001. By reading off the charts and using the T-S diagram on Page 3,fill in the following information (15 pts):Depth (meters)Temperature(degrees Celsius)Salinity (parts perthousand)Density (kg/m3)2027°C33.81.034018°C34.81.046014.1°C34.91.038013°C34.91.0110012.1°C34.91.05From what you know about thermoclines and haloclines, give an approximate depth for the following (5 pts). Note: Don’t forget UNITS!!Start of the thermocline: 20mStart of the halocline: 20m Approximate depth of the mixed layer: 20mExtra Credit (2 pts): Is this arrangement of water stable or unstable? Explain why.This arrangement of water is stable. The density of said-water has a greater intensity at the bottom, whereas the density of the water does not have the same intensity at the top, therefore it is less at the top. 1

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