  In this paper, we study Joule-Thomson expansion for Hayward-AdS black hole in
the extended phase space, and obtain a Joule-Thomson expansion formula for the
black hole. We plot the inversion and isenthalpic curves in the T-P plane, and
determine the cooling-heating regions. The intersection points of the
isenthalpic and inversion curves are exactly the inversion points
discriminating the heating process from the cooling one.
