Consider an ideal air-standard Brayton cycle operating with inlet temperature (T₁) and pressure (P₁) of 300 K and 100 kPa, respectively. The heat added per unit mass, q₂–₃, is 1050 kJ/kg. Assume the following constant values of the specific heats: c_p = 1.005 kJ/kgK and c_v = 0.718 kJ/kgK. Investigate the effects of the compressor pressure ratio (P₂/P₁) by performing the tasks listed. Use a spreadsheet to perform all repetitive calculations; however, make sure that you check at least one calculation by hand.

A. Sketch the cycle on T–s and P–v diagrams indicating the key state points with bold dots.

B. Calculate the turbine inlet temperature (T₃), the net work per unit mass, and the thermal efficiency as functions of the compressor pressure ratio for a range from 10 to 25. Create a single computer-generated plot of your results.

C. Discuss your results.

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P₂ varied 2. P₁ = 100 kPa T₁ = 300 K 92-3 fixed HX HX 94-1 3 T3 = ? Wnet = ?