This thesis is a result of a partnership between Politecnico di Torino and Ethos Energy Group. The main project is based on the improvement of TG20 B7/8 (gas turbine produced by Ethos Energy Group) to a new upgrade called “TG20 B7/8 UG3”. The aims of this improvement are to increase efficiency and the net produced power and furthermore to decrease the NOx emission. This work is one of the parts of the entire project and it is regarding the analyses of the thermal and structural loads that are applied in the turbine. This is done to ensure that innovations appliedto the engine do not endanger the gas turbine’s life.