有机工质向心透平设计参数优选及热力设计  

OPTIMIZATION OF DESIGN PARAMETERS AND THERMODYNAMIC DESIGN FOR RADIAL FLOW TURBINE OF ORGANIC WORKING FLUID

作　　者：范伟[1] 赵若丞 韩中合[1] 王智[1] 

机构地区：[1]华北电力大学,电站设备状态监测与控制教育部重点实验室,保定071003

出　　处：《太阳能学报》2017年第8期2309-2316,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51306059);中央高校基本业务费专项资金(2014MS151)

摘　　要：选用6种干工质,在相同低温热源参数下,确定有机工质向心透平设计工况,采用筛选法对透平进行设计参数优选及热力设计,并分析不同工质透平的热力设计方案与热源的匹配性。在参数选取阶段,应结合工质物性避免加速因子过大,有机工质向心透平较为适用的设计参数选择区域与文献推荐的有所不同;由计算结果可知,采用R600a设计的透平相对内效率居中,但系统热效率最高,为9.96%,内功率最大,为80.69 k W,采用R123的系统热效率为8.44%,内功率最低,为68.54 k W;采用R600a和R600工质透平的系统热效率和内功率较高,几何尺寸相对较小,与给定热源条件具有较好的匹配性。Under same low temperature heat source parameters, six kinds of dry working fluids were chosen to confirm design condition of radial-inward-flow turbine of organic working fluids, the sieve method was used for parameter optimization and thermodynamic design of turbine design, and analyzing the matching of the thermodynamic design scheme of different working fluid turbines with heat source. Working fluid property should be considered adequately to prevent acceleration factor too large in the preliminary selection stage of parameters. The selection area of applicable design parameter for radial flow turbine of organic working fluids was a little different from that recommended in the literature. The calculation results show that the designed relative internal efficiency of turbine using R600a is mediacy, but the system has maximum thermal efficiency of 9.96% and the largest internal power of 80.69 kW, respectively. The system has thermal efficiency of 8.44% for using 123 and the lowest internal power of 68.54 kW. The thermal efficiency and internal power of radial-inflow turbines system using the R600a and R600 as working fluids are higher, the geometry size is relative smaller, and has better matching attribute with the given heat source condition.

关 键 词：有机工质 向心透平 设计参数预选 热力设计 热匹配 

分 类 号：TK14[动力工程及工程热物理—热能工程]