Implementing Black Hole as Efficient Power Plant *

Shao-Wen Wei,Yu-Xiao Liu

Fig. 3 (Color online) Carnot engine with $\tilde{T}_{2}=0.1$. The work and heat for the engine are plotted in thin solid blue line and thin dashed blue line (left $y$-axis), respectively. The engine efficiency is plotted in thick solid red line (right $y$-axis).