In this work, the evaluated performance of thermal station is mechanically studied by determining the performance parameters for generative unit, which it is given the calculation model by doing heat balance for each one of its principal parts. A comparison is done between the particle results, which are obtained from the station and the theoretical results which its calculated from the basic first law thermodynamics, The different working loads (40%, 70%, 100%) of its completes load have been considered in order to determine the optimum working circumstances, in addition to demonstrate the effect of some working and environmental circumstances on unit performance