Politecnico di Milano is a public technical university established in 1863, nowadays organised in 12 departments and a network of 6 Schools of Engineering, Architecture and Industrial Design. The number of students enrolled in all campuses is approximately 40,000, which makes the Politecnico di Milano the largest Engineering School in Italy. The research activity pursued at the Department of Energy spans a wide range of thermo-fluid-dynamic and chemical processes required to convert primary energy sources (including fossil, renewable and wastes) into useful forms of energy (electricity, heat, synthetic fuels) in stationary and mobile plants. The participation to the CO2OLHEAT will be assured by two research groups: LFM (Laboratory of Fluid-Machines) will support the design of the turbo-expander by applying a hierarchy of tools for the design and optimization of sCO2 turbomachinery, from mean-line models to high-fidelity CFD; GECOS (Group of Energy COnversion Systems) will provide support to system optimization, cycle configuration definition and off-design analysis.