  By considering AdS charged black hole in the context of extended
thermodynamic as the working substance we use it as a heat engine. We
investigate the effect of hairy charge on the evolution of efficiency and
Carnot efficiency along with electric charge. Because of interesting
thermodynamic behavior of hairy black holes it would be natural to know their
effects when we use black hole as a heat engine. We show that the hairy charge
increases the efficiency, and so maximum temperature would be happened for
bigger Maxwell charge when this hairy charge grows. For the fixed electric
charges, the efficiency has a minimum value. In fact all critical points
describe physical states except when the charge removed. If the electric charge
takes a zero value then the hairy charge must be negative. We also seek
behavior of the system for large charges which is provided a model with
low-temperature thermodynamics.
