Partitioned simulation method for nuclear power unit condenser

Abstract

The invention provides a partitioned simulation method for a nuclear power unit condenser. The method comprises the steps of (1), partitioning simulation objects, wherein the simulation objects comprise general condensers and shared condensers, and partitioning comprises uniform partitioning and non-uniform partitioning; (2), inputting structure sizes, physical properties, boundary parameters and calculation initial values of the condensers; (3), carrying out thermal-transfer calculation on one-to-one correspondence partitions at a shell side and a pipe side; (4), carrying out thermal parameter calculation; and (5), outputting a simulation result. Compared with an actual device, the simulation model established by the method has the advantages that the output data under steady state and transient state condition can satisfy a device simulation precision demand, and the operation characteristic research can be carried out through utilization of the simulation method.

Description

technical field [0001] The invention relates to a simulation method, in particular to a simulation method for a condenser of a nuclear power plant. Background technique [0002] The nuclear power plant condenser is one of the main equipment in the secondary circuit, responsible for condensing the wet steam that has done work in the steam turbine into condensed water, and transferring the heat released by the condensation to the circulating water. The condenser used in nuclear power plants is divided into two parts, the shell side and the tube side, which are physically separated by heat exchange tubes. The steam and other steam discharged from the steam turbine unit, because the temperature is higher than the temperature of the outer wall of the heat transfer tube, heat exchange occurs, and the latent heat of vaporization is released through liquefaction, and the heat is transferred to the outer wall of the heat exchange tube; because the temperature of the outer wall of the...

AI Technical Summary

Problems solved by technology

The condenser simulation method based on the lumped parameter method cannot take into account the small differences in the internal pressure of the equipment; the existing partition simulation method is partitioned for the axial direction, which can only reflect the flow sequence and cannot reflect the difference in thermal parameters at different positions

In the shared condenser, the pressure difference between different steam inlets and exhaust ports is a relatively important parameter, and the traditional calculation method cannot be used for different calculations.

Therefore, traditional simulation modeling methods can no longer meet the needs of high-precision real-time simulation

Images