Thermal performance evaluation system and method for vertical steam generator

Abstract

The invention provides a thermal performance evaluation system and method for a vertical steam generator. The thermal performance evaluation system comprises a thermal hydraulic modeling module, a detection module and a calculation and analysis module, wherein the thermal hydraulic modeling module is used for dividing a plurality of different areas according to the tube side and housing side structures of the steam generator and the single-phase or double-phase characteristics of fluid flow so as to establish corresponding entropy production calculation models; the detection module is used fordetecting temperature, pressure and flow signals corresponding to the tube side and the housing side in the operation process of the steam generator; and the calculation and analysis module is used for calling the corresponding entropy production calculation models according to the processed temperature, pressure and flow signals, calculating corresponding entropy productions according to the tube side and the housing side, and calculating the total entropy production of a heat exchange system of the steam generator so as to carry out overall evaluation on the thermal performance of the steamgenerator. According to the thermal performance evaluation system and method, the irreversible entropy productions of the tube side and the housing side are considered at the same time, all the areasof the steam generator are covered, and the whole heat exchange process of the steam generator is completely fed back; and valuable reference is provided for the design and thermodynamic analysis ofthe steam generator.

Description

technical field [0001] The invention relates to the technical field of nuclear power plants, in particular to a thermal performance evaluation system and method for a vertical U-shaped natural steam generator of a nuclear power plant. Background technique [0002] Entropy is one of the parameters of the standard state of matter in thermodynamics, and its physical meaning is the degree of disorder of the system. In a nuclear power plant, besides the reactor, the most important equipment is the steam generator, which takes the energy generated by nuclear fission of the core out of the primary circuit coolant, transfers the heat to the feed water of the secondary circuit, and generates steam with a certain pressure and temperature. The steam is sent to the steam turbine to do work, which is the hub connecting the reactor and the steam turbine, so the working state of the steam generator affects the dynamic characteristics of the entire PWR equipment. [0003] The steam generat...

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Problems solved by technology

[0005] The present invention aims at the technical problems existing in the prior art that the deviation of the analysis result is relatively large, the analysis area is incomplete, and the entire working process of the heat exchange of the steam generator cannot be effectively covered. Vertical steam generator thermal performance evaluation system and evaluation method for establishing a complete analysis and evaluation system

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