液体比热容实验系统的研制

基于流动型绝热量热法搭建了一套高温高压液体比热容实验系统,系统主要包括:流动型量热器、电加热控温系统以及内外绝热屏。该实验系统的温度范围为293~453 K,压力范围为0.1~20 MPa。为了检验实验系统的漏热损失,采用纯水在不同温度下进行标定;为了进一步检验实验系统的准确性,测量了甲苯和环己烷2种参考物质在不同温度和不同压力下的比定压热容,新实验系统的不确定性评定结果,比定压热容的扩展不确定度为1.41%（k=2）。

The Development of the Flow Liquid Heat Capacity Experiment System

The flow liquid heat capacity experiment system was developed to measure heat capacity in the high temperature and high pressure range. The experiment system contained flow calorimeter, the electric heating system, the inside and outside two adiabatic shields. The temperature range of the apparatus was from 293 K to 453 K, and the pressure range was 0.1~20 MPa. Firstly, the pure water was adopted to calibrate coefficient of heat leakage, then, the toluene and cyclohexane were used to test the accuracy and reliability of the system at different temperatures and pressures. Through the uncertainty analysis, the expanded uncertainty of the experimental apparatus was less than 1.41%( k=2).