Air initially at 120 psia and 500*F is expanded by an adiabatic turbine to 15 psia...
Air initially at 120 psia and 500*F is expanded by an adiabatic turbine to 15 psia and 200* F. Assuming air can be treated as an ideal gas and has variable specific heat.
a) Determine the specific work output of the actual turbine (Btu/lbm).
b) Determine the amount of specific entropy generation during the irreversible process (Btu/lbm R).
c) Determine the isentropic efficiency of this turbine (%).
d) Suppose the turbine now operates as an ideal compressor (reversible and adiabatic) where the initial pressure is 15 psia, the initial temperature is 200 * F, and the ideal exit state is 120 psia. What is the minimum specific work the compressor will be required to operate (Btu/lbm)?
Homework Answers
Add Answer to:
Air initially at 120 psia and 500*F is expanded by an adiabatic
turbine to 15 psia...
Combustion gases enter an adiabatic gas turbine at 1540 F degrees and 120 psia and leave...
Combustion gases enter an adiabatic gas turbine at 1540 F degrees and 120 psia and leave at 60 psia with a low velocity. Treating the combustion gases as air and assumming an isentropic efficiency of 82 percent, determine the work output of the turbine. Assume that combustion gases can be treated as an ideal gas with variable specific heats.
ANSWER PLEASE PROBLEM #2 (68 pts.) Steam at 200 psia, 600°F (State 1) enters an adiabatic...
ANSWER PLEASE
PROBLEM #2 (68 pts.) Steam at 200 psia, 600°F (State 1) enters an adiabatic turbine cperating at steady state with a mass flow rate of 16.5 lbm/min and exits at 15 psia, 240°F (State 2), Neglecting the changes in kinetic and potential energies and assuming the surroundings to be at T.- 537 R. Determine: a) the actual power output, in Btu/min. b) the reversible (or maximum) power output, in Btu/min. c) the rate of exergy destruction, in Btu/min....
1) Steam at 200 psia and 600 F is supplied to a turbine and exhausted at...
1) Steam at 200 psia and 600 F is supplied to a turbine and exhausted at 14.7 psia. The flow is adiabatic, the power output of the turbine is 10000 kW and it's isentropic efficiency is 65 %. Determine the steam rate in lbm/h.
11) An adiabatic compressor is to be powered by a direct-coupled adiabatic turbine that is also...
11) An adiabatic compressor is to be powered by a direct-coupled adiabatic turbine that is also driving a generator. Steam enters the turbine at 10 MPa and 500 °C at a rate of 15 kgs and exits at 20 kPa. The turbine isentropic efficiency is 85% Air enters the compressor at 98 kPa and 230C at a rate of 10 kg/s, and exits the compressor at 1.2 MPa. The compressor efficiency is 75 %. Determine: a) the power requirement of...
1. A combined gas-steam power cycle uses a single gas turbine cycle for the air cycle...
1. A combined gas-steam power cycle uses a single gas turbine
cycle for the air cycle and a simple Rankine cycle for the water
vapor cycle. Atmospheric air enters the compressor at a rate of
88.2 lbm / s, at 14.7 psia and 59 ° F, and the maximum gas cycle
temperature is 1,742 ° F. The pressure ratio in the compressor is
7. The isentropic efficiency of both the compressor and the turbine
is 80%. Gas exits the heat...
NGINEERI 13. A centrifugal compressor (not a piston type) compresses the air from the ambient condition at T, 300K and Pi 1 bar to P 10 bar following three different, standalone paths: isentropic,...
NGINEERI 13. A centrifugal compressor (not a piston type) compresses the air from the ambient condition at T, 300K and Pi 1 bar to P 10 bar following three different, standalone paths: isentropic, reversible isothermal, and an irreversible adiabatic process, respectively. (Note: These processes are not sequential processes; rather each of them is an independent, standalone p They all start at the same initial condition at state 1, but they end at different state 2.) The mass flow rate is...
Air is the working fluid in a gas-turbine power system which rotates an electric generator. The...
Air is the working fluid in a gas-turbine power system which rotates an electric generator. The system includes a compressor, a two-stage turbine and a regenerator. Air enters a compressor with a compression ratio of 16 at 14 lbf/in2 and 70°F. For each stage of the turbine, compression ratio is 8 and temperature of air entering is 2000°F. The reported isentropic efficiency for each turbine and the compressor is 85%. Regeneration system is 70% efficient. Considering specific heat capacities varying...
3a. A gas-turbine power plant operates on the simple Brayton cycle between the pressure limits of...
3a. A gas-turbine power plant operates on the simple Brayton cycle between the pressure limits of 14.7 and 200 psia. Air enters the compressor at 77°F at a rate of 28 lbm/s and leaves at 750°F. Fuel is burned in the combustion chamber and the combustion gases enter the turbine at 2000°F. Combustion gases leave the turbine whose isentropic efficiency is 85 percent. Treating the combustion gases as air and using constant specific heats evaluated at 900°F, determine (a) the...
An adiabatic turbine operates at steady state. Air enters the turbine at a pressure and temperature...
An adiabatic turbine operates at steady state. Air enters the turbine at a pressure and temperature of 800 kPa and 1100 K, respectively, and exits at 100 kPa. A temperature sensor at the turbine exit indicates that the exit air temperature is 700 K. Kinetic and potential energy effects are negligible, and the air can be treated as an ideal gas. Determine if the exit temperature reading can be correct. If yes, determine the turbine isentropic efficiency.
NO INTERPOLATION REQUIRED Air enters an adiabatic turbine at 1000 kPa and 1625 degrees C (state...
NO INTERPOLATION REQUIRED Air enters an adiabatic turbine at 1000 kPa and 1625 degrees C (state 1) with a mass flow rate of 5 kg/s and leaves at 100 kPa the isentropic efficiency of the turbine is 85%. Neglecting the kinetic energy change of the steam, and considering variable specific heats, determine: a. the isentropic power of the turbine Isentropic power in kW b. the temperature at the turbine exit temperature at exit in degrees C c. the actual power...
ANSWER PLEASE
PROBLEM #2 (68 pts.) Steam at 200 psia, 600°F (State 1) enters an adiabatic turbine cperating at steady state with a mass flow rate of 16.5 lbm/min and exits at 15 psia, 240°F (State 2), Neglecting the changes in kinetic and potential energies and assuming the surroundings to be at T.- 537 R. Determine: a) the actual power output, in Btu/min. b) the reversible (or maximum) power output, in Btu/min. c) the rate of exergy destruction, in Btu/min....
1) Steam at 200 psia and 600 F is supplied to a turbine and exhausted at 14.7 psia. The flow is adiabatic, the power output of the turbine is 10000 kW and it's isentropic efficiency is 65 %. Determine the steam rate in lbm/h.
11) An adiabatic compressor is to be powered by a direct-coupled adiabatic turbine that is also driving a generator. Steam enters the turbine at 10 MPa and 500 °C at a rate of 15 kgs and exits at 20 kPa. The turbine isentropic efficiency is 85% Air enters the compressor at 98 kPa and 230C at a rate of 10 kg/s, and exits the compressor at 1.2 MPa. The compressor efficiency is 75 %. Determine: a) the power requirement of...
1. A combined gas-steam power cycle uses a single gas turbine
cycle for the air cycle and a simple Rankine cycle for the water
vapor cycle. Atmospheric air enters the compressor at a rate of
88.2 lbm / s, at 14.7 psia and 59 ° F, and the maximum gas cycle
temperature is 1,742 ° F. The pressure ratio in the compressor is
7. The isentropic efficiency of both the compressor and the turbine
is 80%. Gas exits the heat...
NGINEERI 13. A centrifugal compressor (not a piston type) compresses the air from the ambient condition at T, 300K and Pi 1 bar to P 10 bar following three different, standalone paths: isentropic, reversible isothermal, and an irreversible adiabatic process, respectively. (Note: These processes are not sequential processes; rather each of them is an independent, standalone p They all start at the same initial condition at state 1, but they end at different state 2.) The mass flow rate is...
Air is the working fluid in a gas-turbine power system which rotates an electric generator. The system includes a compressor, a two-stage turbine and a regenerator. Air enters a compressor with a compression ratio of 16 at 14 lbf/in2 and 70°F. For each stage of the turbine, compression ratio is 8 and temperature of air entering is 2000°F. The reported isentropic efficiency for each turbine and the compressor is 85%. Regeneration system is 70% efficient. Considering specific heat capacities varying...
3a. A gas-turbine power plant operates on the simple Brayton cycle between the pressure limits of 14.7 and 200 psia. Air enters the compressor at 77°F at a rate of 28 lbm/s and leaves at 750°F. Fuel is burned in the combustion chamber and the combustion gases enter the turbine at 2000°F. Combustion gases leave the turbine whose isentropic efficiency is 85 percent. Treating the combustion gases as air and using constant specific heats evaluated at 900°F, determine (a) the...
Most questions answered within 3 hours.
-
a girl stands on the edge of a merry-go-round of radius 1.71m.
If the merry go...
asked 2 minutes ago -
A mechanic sells a brand of automobile tire that has a life
expectancy that is normally...
asked 16 minutes ago -
A new prototype of sunglasses are designed to help people with
colour blindness see with better...
asked 17 minutes ago -
The table to the right shows the results of a survey in which
26002600
adults from...
asked 22 minutes ago -
1. Draw the chemical structure of each target compound,
amitriptlyline, chlorpheniramine, doxepin, chlorpromazine and
papaverine. What...
asked 22 minutes ago -
Compare the concept between Function and
Process in an organization. Explain the
reasons why the concept of...
asked 23 minutes ago -
Temperament can play a role in parenting style and, sometimes, it
can be challenging for a...
asked 36 minutes ago -
Company XYZ uses a standard costing to evaluate operational
performance against budget.
The following budget and...
asked 38 minutes ago -
How does procurement play a role in the value chain process?
Give an example.
asked 48 minutes ago -
6.) A clay vase on a potter's wheel experiences an angular
acceleration of 7.90 rad/s2 due...
asked 48 minutes ago -
Question about JS form validation:
I want to check these two input (name, question) with
one...
asked 50 minutes ago -
Acetic acid, CH3COOH, Ka = 1.8 x 10-5 can be converted
into the acetate ion, CH3COO-2,...
asked 52 minutes ago