核电厂重要厂用水系统换热器热力性能评价方法分析

The Thermodynamic Performance Evaluation Method Analysis of the Safety-related Service Water System Heat Exchanger in Nuclear Power Plant

为解决北方某核电厂重要厂用水系统冬季工况下换热器热力性能评价问题,结合换热器传热设计的基本理论及换热器热力评价相关文献,对比分析目前各核电厂对该换热器热力性能评价方法原理及适用范围,总结现有评价方法在冬季变工况运行下换热器热力性能评价中存在的不足,针对这些不足提出了冬季变工况下换热器热力性能评价适用性改进方案。

In order to solve the problem of evaluating the thermodynamic performance of the heat exchanger of the safety-related water system in the winter operation in a nuclear power plant located in northern part of China,comparative analysis is carried out for the foundation of the evaluating method and applicable range of the performance evaluation of the heat exchanger performed by different nuclear power station based on the basic theory that the heat exchanger design follows and the literature reviews on the evaluation of heat exchanger performance.The drawbacks of the existing evaluation methods of the thermal performance of the heat exchanger under various working conditions in winter are summarized.Based on the insight study on these problems,we proposed an improved scheme of thermal performance evaluation for the heat exchanger under winter condition.