Wen Chenyang, Meng Xianyang, Huber Marcia L, Wu Jiangtao
Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, Xi'an Jiaotong University, Xi'an, 710049, China.
Applied Chemicals and Materials Division, National Institute of Standards and Technology, Boulder, CO 80305-3337, USA.
J Chem Eng Data. 2017 Oct 12;62(10):3603-3609. doi: 10.1021/acs.jced.7b00572. Epub 2017 Sep 6.
The Paris Agreement on climate change, in which many nations have agreed to limit greenhouse gas emissions, has spurred interest in developing working fluids with low global warming potential (GWP) that can satisfy environmental concerns and have thermophysical properties that can meet engineering performance requirements. One such fluid is 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone (also known as Novec-649 and Novec-1230), which has potential applications in organic Rankine cycles (ORC), electronics cooling, computer/data center cooling and fire extinguishing. In this work, viscosity measurements of 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone were reported. The measurements were performed over the temperature range of (243 to 373) K and at pressures up to 40 MPa using a vibrating-wire viscometer. The combined expanded uncertainty of the reported viscosity was 2 % with a confidence level of 0.95 ( = 2). These experimental data were used to develop a viscosity correlation that covers a wide temperature and pressure range, with an estimated uncertainty at a 95% confidence level of 2% for the liquid phase from (240 to 400) K at pressures up to 40 MPa.
《巴黎气候变化协定》中，许多国家已同意限制温室气体排放，这激发了人们对开发全球变暖潜能值（GWP）低的工作流体的兴趣，这类流体既能满足环境要求，又具备能满足工程性能需求的热物理性质。其中一种流体是1,1,1,2,2,4,5,5,5-九氟-4-（三氟甲基）-3-戊酮（也称为Novec-649和Novec-1230），它在有机朗肯循环（ORC）、电子设备冷却、计算机/数据中心冷却及灭火方面具有潜在应用。在这项工作中，报告了1,1,1,2,2,4,5,5,5-九氟-4-（三氟甲基）-3-戊酮的粘度测量结果。测量是使用振弦粘度计在（243至373）K的温度范围及高达40 MPa的压力下进行的。报告的粘度的合成扩展不确定度为2%，置信水平为0.95（k = 2）。这些实验数据用于建立一个涵盖宽温度和压力范围的粘度关联式，对于温度范围为（240至400）K、压力高达40 MPa的液相，在95%置信水平下估计不确定度为2%。
