Why does the Brownian ratchet have Carnot cycle efficiency?

[rohitupreti]

In feynman's description for the ratchet pawl system he gets the efficiency for the system to be same as he efficiency in the carnot cycle. I am not able to understand or if its correct that the process could be visualized as carnot cycle. Pls explain.

 

[Simon Bridge]

Welcome to PF;
it is not the same process as a carnot cycle - it just has the same efficiency.