  In this paper, we explore the Joule-Thomson expansion (JTE) process for the
Einstein-Power-Young-Mills (EPYM) and the AdS Kerr Sen (AKS) black holes. We
study the effect of free parameters on the Joule-Thomson coefficient (JTC), the
inversion curve, and the $T_i^{min}/T_{c}$. The isenthalpic curves of the AKS
black hole show cooling or heating behavior depending on the inversion curve,
which is affected by the mass and the parameters $b$ and $a$ of the black hole.
If we assume the parameter $b$ to be zero, the results reduce to the Kerr-AdS
black holes[1]. In [2,3], for the Einstein-Power-Yang-Mills AdS black hole with
$q>1$ and $n=2$, the $T_i^{min}/T_{c}$ is $1/2$. But in this paper, for the
AdS-Maxwell-power-Yang-Mills black hole, when $q>1$, the $T_i^{min}/T_{c}$ is
almost equal to $1/2$ for the increase of Maxwell's charge $C$, and when
$q=1/2$, the $T_i^{min}/T_{c}$ is equal to $1/2$ for all values of $C$. Also,
when $1/2<q<1$, the $T_i^{min}/T_{c}$ is close to the value of $1/2$, and
finally when $0<q<1/2$, the values of $T_i^{min}/T_{c}$ move away from the
value of $1/2$, that is, they become smaller. For the AKS black hole, we found
that for free parameters $a=0.00951$ and $b=0.00475$, the $T_i^{min}/T_{c}$ is
almost $1/2$. Finally, we compare our findings with others in the literature
and summarize our results in Tables 1-5.
