In: Mechanical Engineering

Air enters the compressor of an ideal cold air-standard Brayton
cycle at 100 kPa, 300 K, with a mass flow rate of 6 kg/s. The
compressor pressure ratio is 10, and the turbine inlet temperature
is 1400 K.

For *k* = 1.4 and *C*_{p} = 1.005 kJ/kg,
calculate:

(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 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 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...

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 at 100 kPa, 300 K and is compressed to
1000 kPa. The temperature at the inlet to the first turbine stage
is 1400 K. The expansion takes place isentropically in two stages,
with reheat to 1400 K between the stages at a constant pressure of
300 kPa. A regenerator having an effectiveness of 100% is also
incorporated into the cycle. The turbine and the compressor each
have am isentropic efficiency of 80%. Determine the following:
(a.)...

9.43 An ideal air-standard
state with compressor inlet conditions of 300 K and 100 kPa and a
fixed turbine inlet temperature of 1700 K. For the cycle,
Plot the net work developed per unit mass flowing, in kJ/kg, and
the thermal efficiency, each versus compressor pressure ratio
ranging from 2 to 50.
I need the IT Thermodynamics software code, or at least
I need to know how to set the code up. Also, please note that this
is an air-standard...

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 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 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 a regenerative air-standard Brayton
cycle with a volumetric flow rate of 20 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 ideal gas refrigeration cycle
at 7oC and 40 kPa and the turbine at 37oC and 170 kPa. The mass
flow rate of air through the cycle is 0.3 kg/sec. Assuming variable
specific heats for air, determine (a) the rate of refrigeration,
(b) the net power input, and (c) the coefficient of performance.
Also, draw the T-s diagram of the gas refrigeration cycle.

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