Response to Mehdi's suggestion

- In \subsection{Thermal Management}, we need to move the below paragraph into introduction, or electrical grid section. This paragraph is not related to thermal management, but it regards the whole HPC/Grid integration problem.

This paper assumes that the given grid is a constant. However, it is expected that future grid infrastructures will evolve due to grid integration solutions \cite{he_architecture_2008}. This may make thermal management more challenging.