# The thermal efficiency of a Brayton cycle can be increased by adding a regenerator as shown in the schematic below.

## Question:

The thermal efficiency of a Brayton cycle can be increased by adding a regenerator as shown in the schematic below. Consider a Brayton cycle using air under the following conditions: T_{A} = 298 K, P_{A} = P_{E} = P_{F} = 0.1 MPa, P_{B} = 0.6 MPa, T_{D} = 973 K, T_{F} = 563 K. The efficiency of the turbine and compressor are to be 85%. Consider air as an ideal gas stream with C_{P} = 0.79·C_{P,N2} + 0.21·C_{P,O2}, and assume the molar flows of B and E are equal. Determine the thermal efficiency, heat required, and net work output per mole of air, assuming

(a) The heat capacities are temperature-independent at the values at 298 K.

(b) The heat capacities are given by the polynomials in Appendix E.

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**Related Book For**

## Introductory Chemical Engineering Thermodynamics

**ISBN:** 9780136068549

2nd Edition

**Authors:** J. Elliott, Carl Lira

**Question Details**

**5**- THERMODYNAMICS OF PROCESSES

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