提出了一种燃气管网压力能耦合蒸汽联合发电系统,采用Aspen Plus软件对该流程进行了模拟和热力学分析,并与常规燃气蒸汽联合发电系统进行了对比。考察了燃气入口压力和组成对系统能源利用效率和 GFDA3 效率的影响。研究结果表明,该系统能源利用效率和 GFDA3 效率分别达到57.48%和54.68%,高于常规参比系统0.23%和0.15%。系统最大 GFDA3 损发生在燃烧室,占总 GFDA3 损的63.5%。燃气入口压力增加,有利于系统整体效率的提升,但不同组分的燃气对系统的效率影响较小。

A gas pipeline network pressure energy coupled with steam combined power generation system is proposed,and compared with the conventional gas steam combined power generation system.Simulation and thermodynamic analysis are performed on this process by means of ASPEN PLUS software.The effects of inlet pressure and composition of gas on the energy efficiency and exergy efficiency of the system are investigated.Study results show that the energy efficiency and the exergy efficiency reach 57.48% and 54.68%,respectively,which are higher than that of the conventional reference system by 0.23% and 0.15%.The biggest exergy loss of the system occurs in the combustion chamber,accounting for 63.5% of the total loss.Higher gas inlet pressure is conducive to the improvement of the overall efficiency of the system,but gas composition has little impact on the efficiency of the system.

韩金珂(1993-),女,硕士,工程师,研究方向为天然气管道输送、能源高效利用、氢能等新能源应用,hanjk@szgas.com.cn;刘建辉(1967-),男,博士,教授级高级工程师,研究方向为城市燃气管网输配、能源转化及高效利用,通讯联系人,liujh@szgas.com.cn。