有机工质向心透平数值计算及性能分析  

Numerical Calculation and Performance Analysis of Radial-inflow Turbine

作　　者：韩中合[1] 赵若丞 范伟[1] 许鸿胜 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：《汽轮机技术》2017年第6期409-412,458,共5页Turbine Technology

基　　金：国家科技支撑计划(2014BAA06B01);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：有机朗肯循环发电技术在回收低品位热源方面具有明显优势。以150℃的低温烟气为热源,选用R245fa和R600为工质,在相同热源参数下,确定透平设计条件,采用筛选法对透平进行热力设计,根据设计参数对透平进行三维造型及数值模拟研究,分析各工质透平通流部分的流场,并结合系统热力性能参数,对透平整体性能进行分析。由计算结果可知,与R245fa透平相比,R600透平的通流部分流场分布较合理,且透平相对内效率和系统输出功率均较大,分别达到了75.13%和75.34k W,与给定热源条件具有较好的匹配性。The organic rankine cycle power generation technology has significant advantages in recovering low-grade heat sources. Based on the same parameters with flue gas of 150℃ as heat source, this paper determines design conditions of radial-inflow turbines with R245fa and R600 as working fluids. It performs thermodynamic design for the turbines with the screening method. On the basis of the design parameters, three-dimensional modeling and numerical simulation were carried out, analyzing flow fields of flow path and overall performance of the turbines combined system thermal performance parameters. According to the analysis and comparison of the CFD simulation results, compared with the radial-inflow turbine using R245fa as working fluid, the flow field distribution of through flow part for R600 turbine is reasonable relatively. The result shows that the radial-inflow turbine using R600 as working fluid has the advantages of high relative internal effficiency,high system output and good thermal matching with specific low grade heat source, respectively reaching 75.13% and 75.43kW.

关 键 词：有机工质 向心透平 数值计算 性能分析 

分 类 号：TK14[动力工程及工程热物理—热能工程]