燃气-蒸汽联合循环机组性能分析算法的研究

Study on the Performance Analysis Algorithm of the Gas-steam Combined Cycle Power Unit

从工程热力学出发,建立了大容量燃气-蒸汽联合循环机组热力学理论模型。以此为基础,提出了运用线性小偏差法与机组运行数据相结合的方法研究联合循环机组特性,并开发了通用型联合循环机组性能分析算法。以实际机组为例,计算了各参数变化对机组性能的影响系数,定量分析了机组性能与热力参数的依变关系,为联合循环机组出力和热效率的提高提供了理论依据,为机组变工况特性研究提供了详实的计算数据。

From the view of engineering thermodynamics theory, the thermodynamic model for the large capacity Gas-Steam Combined Cycle power units （GSCC） is built. Based on the theory model, the method to research the GSCC performance is put forward by combining the linear small deviation approach and operation data, and the general GSCC performance analysis algorithm is developed. Using the real power unit as an example, the impact coefficients on the GSCC performance are calculated when the primary parameters vary. The variational relation between the GSCC performance and thermodynamic parameters are quantitatively analyzed. The theory basis is provided for increasing the output and thermal efficiency of GSCC, and the valuable calculation data are provided for the research of the GSCC off-design performance.