Question

Air enters the compressor of an ideal brayton refrigeration cycle at 100 kPa, 300K. The compressor...

Air enters the compressor of an ideal brayton refrigeration cycle at 100 kPa, 300K. The compressor presure ratio is 3.75, and the temperature at the turbine inlet is 350 K. The Brayton cycle is then modified by the introduction of a regenerative heat exchanger. In the modified cycle, compressed air enters the regenerative heat exchanger at 350 K and is cooled to 320 K before enetering the turbine. Determine, for the modified cycle, (A) the lowest temperature, in K. (B) the net work input per unit mass of air flow, inkJ/kg (C) the refrigeration capacity, per unit mass of air flow, in kJ.kg (D) the coefficient of performance.

Science   Advanced-Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Air enters the compressor of an ideal gas refrigeration cycle at 7oC and 40 kPa and...
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.   
n ideal air-standard Brayton cycle operates at steady state with compressor inlet conditions of 290 K...
n ideal air-standard Brayton cycle operates at steady state with compressor inlet conditions of 290 K and 95 kPa and a fixed turbine inlet temperature of 1650 K. For a compressor pressure ratio of 10, determine: (a) the exhaust temperature of the cycle, in K. (b) the back work ratio. (c) the net work developed per unit mass flowing, in kJ/kg. (d) the heat addition per unit mass flowing, in kJ/kg. (e) the thermal efficiency for the cycle.
An air-standard Brayton cycle has a compressor pressure ratio of 10. Air enters the compressor at...
An air-standard Brayton cycle has a compressor pressure ratio of 10. Air enters the compressor at p1 = 14.7 lbf/in.2, T1 = 70°F, with a mass flow rate of 90,000 lb/h. The turbine inlet temperature is 1800°R. Calculate the thermal efficiency and the net power developed, in horsepower, if (a) the turbine and compressor isentropic efficiencies are each 100%. % hp (b) the turbine and compressor isentropic efficiencies are 88 and 84%, respectively. % hp (c) the turbine and compressor...
Consider an ideal gas refrigeration cycle using helium as the working fluid. Helium enters the compressor...
Consider an ideal gas refrigeration cycle using helium as the working fluid. Helium enters the compressor at 105 kPa and 18°C and compressed to 410 kPa. Helium is then cooled to 19°C before it enters the turbine. Assume constant heat capacity of helium. For a mass flow rate of 0.21 kg/s, the net power input required is a. 96.1652 kW b. 63.0826 kW c. 48.0826 kW d. 81.1652 kW
Air enters the compressor of an air-standard Brayton cycle with a volumetric flow rate of 60...
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 at 100 kPa and 10°C enters a compressor and is brought to 1000 kPa and...
Air at 100 kPa and 10°C enters a compressor and is brought to 1000 kPa and 50°C. The constant pressure heat capacity of air is 1.01 kJ/kg K. If 15 kg/min of air are to be compressed, determine the power require- ment of the compressor. State your assumptions. (12.625 kW)
Consider a combined gas-steam power cycle. The topping cycle is a simple Brayton cycle that has...
Consider a combined gas-steam power cycle. The topping cycle is a simple Brayton cycle that has a pressure ratio of 7. Air enters the compressor at 15 ºC at a rate of 10 kg/s and the gas turbine at 950 ºC. The bottoming cycle is a reheat Rankine cycle between the pressure limits of 6 MPa and 10 kPa. Steam is heated in a heat exchanger at a rate of 1.15 kg/s by the exhaust gases leaving the gas turbine,...
Air enters the compressor of a gas-turbine plant at ambient conditions of 100 kPa and 25°C...
Air enters the compressor of a gas-turbine plant at ambient conditions of 100 kPa and 25°C with a low velocity and exits at 1 MPa and 347°C with a velocity of 90 m/s. The compressor is cooled at a rate of 1500 kJ/min, and the power input to the compressor is 250 kW. Determine (a) temperature at the compressor exit Investigate the effect of cooling rate from 1300 kJ/min to 1600 kJ/min in steps of 50 kJ/min on the mass...
Incorrect answer. Your answer is incorrect. Try again. An air-standard Brayton cycle has a compressor pressure...
Incorrect answer. Your answer is incorrect. Try again. An air-standard Brayton cycle has a compressor pressure ratio of 10. Air enters the compressor at p1 = 14.7 lbf/in.2, T1 = 70°F, with a mass flow rate of 90,000 lb/h. The turbine inlet temperature is 1900°R. Calculate the thermal efficiency and the net power developed, in horsepower, if (a) the turbine and compressor isentropic efficiencies are each 100%. Entry field with incorrect answer 47.56 % Entry field with incorrect answer 5468.73...
An open cycle gas turbine using a regenration arrangement. The air enters the compressor at 1...
An open cycle gas turbine using a regenration arrangement. The air enters the compressor at 1 bar 288 K and is compressed to 10 bar with compressor effieciency= 0.85. The air is heated in regenerator and then enter in combustion chamber its temperature is raised ny 1700 k and during the process the pressure falls by 0.2 bar. The air is then expanded in the turbine and passes to regenerator which has 0.75 effectiveness and cause a pressure drop of...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT