基于磁悬浮密度计的高精度流体PVT测量系统
发布时间：2018-08-22 19:29
【摘要】：建立了一套基于磁悬浮密度计的流体PVT测量系统,其温度测量范围203.15~423.15 K,标准不确定度为0.005 K,压力测量范围0~7 MPa,标准不确定度为700 Pa.通过对恒温系统的改进,缩短了实验本体达到热平衡的时间,提高了温度稳定性.利用该系统对高纯氮气在271~345 K,0~6 MPa范围内进行了密度测量,实验结果与NIST REFPROP9.0数据相比偏差在0.1%以内,并对由于拟合维里方程的不确定度、温度测量和压力测量不确定度引起的密度结果的不确定进行了分析.
[Abstract]:A fluid PVT measurement system based on maglev densitometer has been established. The temperature measurement range is 203.15423.15K, the standard uncertainty is 0.005 K, the pressure measurement range is 0 ~ 7 MPa, and the standard uncertainty is 700Pa. Through the improvement of the constant temperature system, the time to achieve the thermal equilibrium of the experimental body is shortened and the temperature stability is improved. The density of high purity nitrogen was measured in the range of 271 ~ 345KN ~ 0 ~ 6 MPa by using this system. The experimental results were less than 0.1% compared with the NIST REFPROP9.0 data, and the uncertainty of fitting the virial equation was analyzed. The uncertainty of the density result caused by the uncertainty of temperature measurement and pressure measurement is analyzed.
【作者单位】： 中国科学技术大学热科学和能源工程系;中国科学技术大学工程与材料科学实验中心;
【基金】：国家自然科学基金(50976113) 安徽省自然科学基金(1408085ME108)资助
【分类号】：TH715.2
本文编号：2198087
[Abstract]:A fluid PVT measurement system based on maglev densitometer has been established. The temperature measurement range is 203.15423.15K, the standard uncertainty is 0.005 K, the pressure measurement range is 0 ~ 7 MPa, and the standard uncertainty is 700Pa. Through the improvement of the constant temperature system, the time to achieve the thermal equilibrium of the experimental body is shortened and the temperature stability is improved. The density of high purity nitrogen was measured in the range of 271 ~ 345KN ~ 0 ~ 6 MPa by using this system. The experimental results were less than 0.1% compared with the NIST REFPROP9.0 data, and the uncertainty of fitting the virial equation was analyzed. The uncertainty of the density result caused by the uncertainty of temperature measurement and pressure measurement is analyzed.
【作者单位】： 中国科学技术大学热科学和能源工程系;中国科学技术大学工程与材料科学实验中心;
【基金】：国家自然科学基金(50976113) 安徽省自然科学基金(1408085ME108)资助
【分类号】：TH715.2
【参考文献】
相关期刊论文 前1条
1 李会亚;公茂琼;郭浩;董学强;吴剑峰;;高精度单浮子磁悬浮密度测量系统研制[J];低温工程;2012年03期
【共引文献】
相关硕士学位论文 前1条
1 于琦;空分流体低温下密度测量及临界特性研究[D];上海交通大学;2013年
，本文编号：2198087
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