To overcome reported failure problems of the turbomachinery for the supercritical carbon dioxide power cycle induced by the high rotational speed and the axial force, an axial impulse type turbo-generator with a partial admission nozzle was designed and manufactured to reduce the rotational speed as well as the axial force. Then, a turbine wheel part was separated by the carbon ring type mechanical seals to use the conventional oil-lubricated tilting-pad bearings. To drive the turbo-generator, a simple transcritical cycle using a liquid CO2 pump was constructed. A 600,000 kcal/h LNG fired thermal oil boiler and a 200 RT chiller were used as a heat source and heat sink. A target turbine inlet temperature and pressure were 200 °C and 130 bar, respectively. Two printed circuit heat exchangers were manufactured for both sides of the heater and cooler. A leakage make-up system by using a reciprocating CO2 compressor, a CO2 supply valve-train to the main loop and the mechanical seal, an oil cooler for the bearings, a load bank and control systems were installed. Before turbine power generating operation, a turbine bypass loop was operated by using an air-driven control valve to determine the system mass flow rate and to make turbine inlet conditions. Then, a 10 kW electric power was obtained under 205 °C and 100 bar of turbine inlet conditions and a continuous operating time was 45 minutes.