Optimal performance analysis of irreversible regenerative MHD power cycles

A performance analysis of an irreversible regenerative magnetohydrodynamic (MHD) power cycle operating at maximum power for a constant-velocity and a constant-Mach-number type of MHD generator has been carried out. The obtain ed results are evaluated together with the results of performance analysis at maximum thermal efficiency, and thus the upper and lower bounds of the o ptimal operating region in terms of power and thermal efficiency are determ ined. The considered MHD power cycle model includes irreversibilities comin g from the electrical losses at the MHD generator, frictions at the compres sor and pressure losses in the heater, the cooler and the regenerator. The effects of these major irreversibilities and regeneration application on th e general and optimal performance are investigated. The analysis presented in this study may provide a theoretical basis for the optimal design and op erating conditions for regenerative MHD power cycles.