On optimizing maximum‐power heat engines

摘要: For a general class of heat engines operating at maximum power, in which the generic sources irreversibility are finite‐rate transfer and friction only, we investigate (1) time‐dependent driving functions that maximize power when input rejection constrained to be nonisothermal, as is case many conventional engines, (2) specific impact on nature engine cycle maximizes engine’s power‐efficiency characteristic. The extent affected by constraints function evaluated, well time divisions different branches optimal cycle. fundamental differences performance arise from frictional losses being internally dissipative, opposed externally derived, illustrative examples presented.