An ideal air-standard Brayton cycle has a compressor pressure ratio of 10. Air enters the compressor at P, = 14.7 psi, T, = 70°F, with a mass flow rate of 90,000 lb/hr. The inlet temperature is 2200 R. The ideal air-standard Brayton cycle analysis is now modified to include the compressor and turbine having isentropic efficiencies of 84% and 88%, respectively. Determine for the modified cycle analysis [a] the thermal efficiency. [n = 31.3%] the net power developed, in horsepower. [WNet 3253 hp] [a]

What is the thermodynamic system? Explain in detail taking two examples.

What is the difference between an open control volume system and a closed isolated system? Please explain in thermodynamics terms. Thank you!

5.7. For the "standard atmosphere" shown in Fig. 5.5, perform the following calculations= (a) Derive the pressure-height relation for the troposphere. (b) Calculate the pressure at the troposphere-stratosphere boundary. (c) Derive the pressure-height relation for the stratosphere.