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Information × Registration Number 0223U005481, 0122U002102 , R & D reports Title High-efficiency steam turbine with ultra-supercritical steam parameters for TPPs of Ukraine and the world popup.stage_title Head Rusanov Roman A., Кандидат технічних наук Registration Date 22-12-2023 Organization A. Podgorny Institute of Mechanical Engineering Problems of the National Academy of Sciences of Ukraine popup.description2 For the first time in the world, a loop scheme with two-tier blades of the steam turbine flow part for ultra-supercritical steam parameters is proposed. Using the example of the K-300 series steam turbine, it is shown that the implementation of this scheme allows solving a number of design and technological problems: preserving the axial dimensions and placing the new turbine in the existing machine rooms, compensating for axial loads and implementing cooling of the blades without heat loss in the thermal cycle. The turbine is designed to work with the next initial parameters of fresh steam: pressure - 35 MPa and temperature - 700°C with intermediate steam superheating to 700°C. The new turbine has 16 stages of a high-pressure cylinder (HPC) and 10 additional stages of a medium-pressure cylinder (MPC). The development was carried out using the in-house IPMFlow software complex. The obtained results show a high internal efficiency of the new flow parts of HPC - 94.18% and MPC - 94.5%. That made it possible to increase the efficiency of the power unit to 49.2%, and the increase in capacity amounted to 80.64 MW. At the next stage, calculations were made on the strength of the created flowing parts. The locations of the greatest stresses have been identified. They are located in the places where the blades are attached to the contours. The values of these stresses are permissible. The next step was to choose the type of blade locks, namely the “mushroom tail” lock. Calculations were also carried out on the strength of this type of locks, which showed their reliability and resistance to stresses in this design. Numerical modeling of the temperature state of the blades of the loop turbine was carried out, in which the cooling of the blades takes place by the selection of colder steam from the "lower" blade. It was determined that when using 2% mass flow of steam for cooling, a decrease in the average blade surface temperature up to 62.2°С for HPC and up to 40.4°С for MPC Product Description popup.authors popup.nrat_date 2023-12-22 Close