In this thesis we will analyze the working principles of the NIBE F1155 geothermal heat pump which is installed in energy center of Polito. we will collect data of the system during one week and we build model of the mump in Coolpack sofware. then we will compare both results which are taken directly from system display and from coolpack. Finally we will check regularity of the system, if ant strange problems or unreal results are detected, we will try to solve them and we will give some suggestions to optimize the Geothermal system