Regeneration, Reheat, and Compression with Intercooling Reconsider Problem 9.55, but inclu...

Regeneration, Reheat, and Compression with Intercooling Reconsider Problem 9.55, but include a regenerator in the cycle. For regenerator effectiveness values ranging from 0 to 100%, plot

(a) the thermal efficiency.

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(b) the percent decrease in heat addition to the air.

Problem 9.55

Air enters the compressor of a simple gas turbine at p1 = 14 lbf/in.2, T1 = 520°R. The isentropic efficiencies of the compressor and turbine are 83 and 87%, respectively. The compressor pressure ratio is 14 and the temperature at the turbine inlet is 2500°R. The net power developed is 5 × 106 Btu/h. On the basis of an air-standard analysis, calculate

(a) the volumetric flow rate of the air entering the compressor, in ft3/min.

(b) the temperatures at the compressor and turbine exits, each in °R.

(c) the thermal efficiency of the cycle.