The Rotor Design Solution Of Supercritical CO2 Turbine Unit

抄録

Compared with steam cycle systems, supercritical carbon dioxide(s-CO2) power cycle system, which is more compact and efficient, can achieve rapid response and multiple start and stop. A high-efficiency turbine, one of the key equipment of s-CO2 power cycle, is being developed by Shanghai Power Equipment Research Institute. Its rotor design is checked by finite element analysis results of rotor dynamics and strength during scheme optimization. By adjusting the flow path scheme, shaft seal scheme and balance piston scheme, the balance disk length and the length of the high temperature section of the rotor is reduced, the system efficiency and safety performance can be greatly improved. The improvement of turbine rotor layout and cooling gas system greatly shorten the overall span of the rotor.