环保混合工质R290+R1234ze(E)/R1234yf的亥姆霍兹模型  

Helmholtz Free Energy Models for the Environment Friendly Refrigerant R290+R1234ze(E)/R1234yf

作　　者：钟权 董学强[1,2] 张海洋 李会亚 赵延兴[1] 沈俊 公茂琼[1,2] ZHONG Quan;DONG Xue-Qiang;ZHANG Hai-Yang;LI Hui-Ya;ZHAO Yan-Xing;SHEN Jun;GONG Mao-Qiong(State Key Laboratory of Technologies in Space Cryogenic Propellants,Technical Institute of Physics and Chemistry,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]航天低温推进剂技术国家重点实验室,中国科学院理化技术研究所,北京100190 [2]中国科学院大学,北京100049

出　　处：《工程热物理学报》2019年第4期737-743,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51676200);航天低温推进剂技术国家重点实验室开放课题(No.SKLTSCP1503);中国博士后科学基金资助项目(No.2017LH031)

摘　　要：本文建立了R290+R1234ze(E)和R290+R1234yf两种混合物的亥姆霍兹型状态方程,混合物的亥姆霍兹自由能α包括理想气体混合物自由能α_0和考虑实际流体混合行为的剩余自由能α_r两部分,表示为温度、摩尔体积和组分的函数,其中,理想部分α_0由相关纯质的最精确的状态方程推导,剩余部分α_r通过混合物的相平衡、气相密度和饱和液密度实验数据拟合得到。本文采用11种混合规则进行了回归计算,分别建立了两种混合物的最优亥姆霍兹型状态方程,拟合数据的平均绝对相对压力偏差均在0.5%以内,平均绝对相对密度偏差均在0.3%以内。Helmholtz free energy equations of state for R290 + R1234 ze(E) and R290 + R1234 yf mixtures are presented in this work. The equations of state are based on the multi-fluid approximations model, where Helmholtz energy of the mixture a is expressed as a function of density,temperature and composition. It consists of two parts a0 and αr,which represent the properties of ideal-gas mixtures and the residual mixture behavior, respectively. The first part α0 can be determined from the most accurate equations of state for each pure fluid, while the second part αr are determined by fitting the available experimental vapour-liquid phase equilibrium data, gaseous ppTx data and saturated liquid ppTx data. In this work, 11 mixture rules(combinations of reducing functions and departure functions) are employed to describe the thermophysical properties of the considered binary mixtures and optimal Helmholtz free energy equations of state are established. The calculated average absolute relative deviations are within 0.5% for pressure and 0.3% for density.

关 键 词：状态方程 亥姆霍兹自由能 R290 R1234ze(E) R1234yf 

分 类 号：O414.12[理学—理论物理]