The optimum performance of a regenerative Brayton cycle was analyzed. The model
includes external and internal irreversibilities coming from four main sources: coupling to
external heat reservoirs, turbine and compressor nonisentropic processes, pressure losses
in the heater and the cooler, and the regenerator. In terms of the parameters accounting for
each type of irreversibility, explicit numerical results are presented for the maximum
efficiency, maximum power output, efficiency at maximum power output, power output at …