Evaluation of the Effectiveness of Using Various Methods for Calculating Steam Turbine Condensers Equipped with Built-In Bundles

In this paper, a comparative analysis of the parameters of water steam condensation was performed in the calculations of the built-in bundle of the condenser of a cogeneration steam turbine using the Metro-Vickers method and the refined method of the All-Russian Thermal Engineering Institute. A computational analysis of the operating modes of the condenser was also performed using various calculation methods with the joint cooling of the main bundles of the condenser with circulating water, as well as that of the built-in bundles with raw water with a wide variation of the main parameters. The results established that the values of the heat transfer coefficients for the built-in bundle, determined using various methods, differed significantly from each other, especially at low values of the specific heat load of the condenser, limiting the use of the Metro-Vickers method under these conditions. In the calculation analysis of the condenser operating modes, several dependencies obtained using the Metro-Vickers method demonstrated significantly greater differences from the experimental data than when using the refined method of the All-Russian Thermal Engineering Institute, especially at reduced condenser steam loads. The study also identified several features of the joint operation of the main and built-in condenser bundles in the cogeneration modes of the turbine unit.