%0 Journal Article
%T 不同浓度配比硼酸溶液比定压热容的实验测量<br>Experimental measurement of isobaric heat capacity of boric acid solutionat
%A 宋星佑
%A 苏超
%A 刘向阳
%A 何茂刚
%J 热科学与技术
%D 2015
%R 10.13738/j.issn.1671-8097.2015.03.012
%X 采用高精度的流动型量热法测量了温度在303~396K、压力在0.1~0.5MPa范围内,浓度分别为7000ppm、40000ppm(无杂质)和40000ppm(含杂质)三种配比硼酸溶液的比定压热容。实验系统的温度、压力、比定压热容的测量不确定度分别小于±0.05K、±18kPa、±0.28%。为了验证实验系统的测量精度和可靠性,测量了温度为296~396K、压力为0.1~6MPa范围内纯水的比定压热容,与NIST文献值相比的相对偏差绝对平均值为0.41%。<br>Isobaric heat capacities of boric acid solution at the concentrations of 0.648,3.700 (no impurities) and 3.700 mol/kg(containing impurities) were measured using high accuracy flow calorimeter at temperatures of 303~396 K and pressures of 0.1~0.5 MPa. The uncertainties of temperature, pressure, and isobaric haet capacity were less than ±0.05 K, ±18 kPa and ±0.28 %, respectively. In order to evaluate the reliability of the experimental system, isobaric heat capacities of pure water at temperatures of 296~396 K and pressures from atmosphere to 6 MPa were measured, and the measured average relative deviation from the NIST literature values is within 0.41%.
%K 比定压热容 量热法 硼酸溶液&lt
%K br&gt
%K isobaric heat capacity
%K calorimeter
%K boric acid solution
%U http://rkxyjs.ijournals.cn/ch/reader/view_abstract.aspx?file_no=Z-14107&flag=1