火电厂辅助汽水系统定量分析计算通用模型的研究与应用

Study and Application of Universal Model for Quantitative Exergy Analysis of Auxiliary Steam and Water for the Coal-fired Power Unit

根据平衡方程,利用效率的概念对火电厂各回热加热器进行了分析,通过论证推导,提出了火电机组辅助汽水系统定量分析计算的通用模型。运用此模型定量计算某电厂328.5MW机组高压缸轴封漏汽利用对汽轮机装置系统效率的影响;为辅助系统局部定量分析提供了便利方法。

Based on exergy balanced equation, with the concept of exergy efficiency the exergy analysis of heaters is worked. Based on strict deduction and demonstration, the general quantitative exergy calculation model of auxiliary steam and water for the coal-fired power unit is given. With this model, take the utilization of shaft-packing leakage in HP cylinder of a 328. 5MW unit to define its effect on steam turbine thermal system. What is more, it provides new theoretic base for coal-fired power unit＇ s thermal exergy analysis especially for partial qualitative exergy analysis.