In: Mechanical Engineering

Air enters the compressor of a regenerative air-standard Brayton
cycle with a volumetric flow rate of 20 m^{3}/s at 0.8 bar,
280 K. The compressor pressure ratio is 20, and the maximum cycle
temperature is 1950 K. For the compressor, the isentropic
efficiency is 92% and for the turbine the isentropic efficiency is
95%.

For a regenerator effectiveness of 86%, determine:

(a) the net power developed, in MW.

(b) the rate of heat addition in the combustor, in MW.

(c) the percent thermal efficiency of the cycle.

Air enters the compressor of a regenerative air-standard Brayton
cycle with a volumetric flow rate of 100 m3/s at 0.8 bar, 280 K.
The compressor pressure ratio is 20, and the maximum cycle
temperature is 1800 K. For the compressor, the isentropic
efficiency is 92% and for the turbine the isentropic efficiency is
95%. For a regenerator effectiveness of 86%, determine: (a) the net
power developed, in MW. (b) the rate of heat addition in the
combustor, in MW. (c)...

Air enters the compressor of a regenerative air-standard Brayton
cycle with a volumetric flow rate of 60 m3/s at 0.8 bar,
280 K. The compressor pressure ratio is 20, and the maximum cycle
temperature is 1950 K. For the compressor, the isentropic
efficiency is 92% and for the turbine the isentropic efficiency is
95%.
For a regenerator effectiveness of 86%, determine:
(a) the net power developed, in MW.
(b) the rate of heat addition in the combustor, in MW.
(c)...

Air enters the compressor of an air-standard Brayton cycle with
a volumetric flow rate of 60 m3/s at 0.8 bar, 280 K. The
compressor pressure ratio is 17.5, and the maximum cycle
temperature is 1950 K. For the compressor, the isentropic
efficiency is 92% and for the turbine the isentropic efficiency is
95%.
Determine:
(a) the net power developed, in kW.
(b) the rate of heat addition in the combustor, in kW.
(c) the percent thermal efficiency of the cycle....

Air enters the compressor of an ideal air standard Brayton cycle
at 100 kPa and 290 K with a mass flow rate (m⋅)
of 6 kg/s. The compressor pressure ratio is 10. The turbine inlet
temperature is 1500 K. If a regenerator with an effectiveness of
70% is incorporated in the cycle, determine (a) the thermal
efficiency (ηth,Brayton) of the cycle. Use the
PG model for air. (b) What-if Scenario: What would
the thermal efficiency be if the regenerator effectiveness...

1) In an air-standard Brayton cycle, the air enters the
compressor at 0.1 MPa and 15?C. The pressure leaving the compressor
is 1.0 MPa, and the maximum temperature in the cycle is 1100?C.
Determine The pressure and temperature at each point in the cycle.
The compressor work, turbine work, and cycle efficiency. For each
control volume analysed, the model is ideal gas with constant
specific heat at 300 K, and each process is steady state with no
kinetic or potential...

Air enters the compressor of an ideal air-standard Brayton cycle
at 100 kPa, 300 K, with a volumetric flow rate of 5 m3/s. The
turbine inlet temperature is 1800 K. For a compressor pressure
ratio of 9, determine: (a) the percent thermal efficiency of the
cycle. (b) the back work ratio. (c) the net power developed, in
kW.

Air enters the compressor of an ideal Brayton refrigeration
cycle at 140 kPa, 270K and is compressed to 420 kPa. At the turbine
inlet, the temperature is 320K and the volumetric flow rate is 0.4
m3/s. Determine (i) the mass flow rate, in kg/s; (ii) the net power
input, in kW; (iii) the refrigerating capacity, in kW; and (iv) the
coefficient of performance.

. Air enters the compressor of a gas turbine power plant
operating on Brayton cycle at 14.5 psia and 540° R. The pressure
ratio across the turbine and compressor is same, which is equal to
6. Assume that the compressor work as 0.4 times the turbine work.
Take K=1.4 a) Draw the T-S diagram of the cycle. [2] b) Calculate
the maximum temperature in the cycle. [3] c) Calculate the cycle
efficiency

An air compressor is operating at a steady state. The air enters
at with a volumetric flow rate 1.2 m^3/s at 170 kPa and 22 degrees
celsius with negligible velocity and leaves at 1500 kPa with
velocity of 200 m/s. The power to the compressor is 60 kW and the
compressor is cooled at a rate of 15 kJ/kg. Determine the exit
area.

A gas turbine operates as a cold-air standard Brayton cycle. Air
enetrs the compressor at 300K and 100kPa and is compressed to
700kPa. During the heat addition process in the combustor, the
temperature of the air increases to 1000K. The turbine and
compressor can be assumed to be operating isentropically. Evaluate
specific heat at 300K.
a. thermal efficiency of the cycle?
b. net work of the cycle (kj/kg)?
c. Back work ratio?

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