适用于超临界CO2管道输送的水力模型及特性研究

摘要

Basing on the stabilized flow equation of continuity equation, motion equation and the energy equation and using density equation established the hydraulic models of super-critical carbon dioxide (CO2). Compared with the accuracy of the equations recommended with established, as a result, the established equation is the better one. Based on the analysis on this model, the conclusions can be drawn:the flow rate is increasing with increase of the pipeline size;under same length, each twofold increase of compressor station will cause flow rate increase by 41.4%;the cold temperature can enhance transportation capacity and the in-crease of initial pressures compared with drop of terminal pressure has greater impacts on trans-portation capacity.%以稳定流的连续性方程、运动方程及能量方程为基础，结合PR方程拟合得到的密度表达式建立了超临界二氧化碳（CO2）的水力计算模型。对国内外推荐模型及本文建立的模型进行计算比较，优选出适合于超临界二氧化碳的水力计算模型。通过对该水力模型进行分析得出结论：增大管径可以增加输量；同等管长下压气站数量增加1倍，输量可以增加41.4%；输送温度越低，管道输送能力越大；提高起点压力对流量的影响大于降低终点压力对流量的影响。