基于IAPWS-IF97的分区判断方法研究  

Research on subregion judgment based on IAPWS-IF97

作　　者：万金雄 郑志秀 陈尼青 阮徐均 WAN Jinxiong;ZHENG Zhixiu;CHEN Niqing;RUAN Xujun(Zhejiang Qianyao Environmental Engineering Co.,Ltd.,Hangzhou 311200,China)

机构地区：[1]浙江千尧环境工程有限公司,浙江杭州311200

出　　处：《能源环境保护》2020年第6期55-60,共6页Energy Environmental Protection

摘　　要：基于IAPWS-IF97计算模型及其补充方程,提出了一种在p-T热力学面上4区紧邻区域分区方法,通过VBA编制了相应的计算函数。结果表明:新函数具有较简单的结构形式及较高的准确性,保留了人工调整接口并提高了应用过程中的灵活性;新函数在临界点附近根据参数δ确定迭代算法范围,提高了临界点附近的计算精度并控制了计算量;在Excel中计算新函数可减少了人工查询时间,提高应用优势。Based on the IAPWS-IF97 and its supplementary equations,a method is proposed to partition 4 regions adjacent to each other on thep-Tthermodynamic surface.The corresponding calculation function is programmed by VBA.The results show that the new function has a simpler structure and higher accuracy.It retains the manual adjustment interface and improves the flexibility in the application process.The new function determines the range of iterative algorithm according to the parameterδnear the critical point,which improves the calculation accuracy near the critical point and controls the amount of calculation.Calculating new functions in Excel can reduce the time of manual query and improve the application advantages.

关 键 词：水和水蒸气 IAPWS EXCEL VBA 热力性质 

分 类 号：X383[环境科学与工程—环境工程]