Engineering, 18.07.2019 22:30 lanakay2006
The compressor inlet temperature of an ideal air-standard brayton cycle is 520°r and the maximum allowable turbine inlet temperature is 2600ºr. plot the net work developed per unit mass of air flow, in btu/lb, and the thermal efficiency versus compressor pressure ratio for pressure ratios ranging from 12 to 24. using your plots, estimate the pressure ratio for maximum net work and the corresponding value of thermal efficiency. compare the results to those obtained in analyzing the cycle on a cold air-standard basis.
Answers: 3
Engineering, 04.07.2019 18:10
Atmospheric air has a temperature (dry bulb) of 80° f and a wet bulb temperature of 60° f when the barometric pressure is 14.696 psia. determine the specific humidity, grains/lb dry air. a. 11.4 c. 55.8 d. 22.5 b. 44.1
Answers: 1
Engineering, 04.07.2019 18:20
Steam enters a converging nozzle at 3.0 mpa and 500°c with a at 1.8 mpa. for a nozzle exit area of 32 cm2, determine the exit velocity, mass flow rate, and exit mach number if the nozzle: negligible velocity, and it exits (a) is isentropic (b) has an efficiency of 94 percent
Answers: 2
Engineering, 04.07.2019 18:20
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Engineering, 04.07.2019 19:20
In the winter, in order to keep the classroom steadily at 68 f before 10 pm, heating with an average rate of 42,000 btu/hr is provided. assume the outdoor temperature maintains at 32°f, determine the electrical power (kw) required to (a) operate a reversible heat pump (b) operate a real heat pump with a cop (7) of 4.5 and (c) operate an electrical-resistance heater.
Answers: 3
The compressor inlet temperature of an ideal air-standard brayton cycle is 520°r and the maximum all...
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