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本文基于流动型量热法建立了一套适用于测量高温高压下比定压热容的实验系统,通过改进传统流动型量热器的管路布置及合理的系统结构设计,使该系统温度、压力适用范围为:293~673 K、0.1~30 MPa。该实验系统温度、压力、比定压热容的测量不确定度分别小于土0.05 K、士13 kPa、:±0.98%。为了验证实验系统的测量精度和可靠性,测量了温度为296~313 K、压力为0.1~6 MPa范围内纯水的比定压热容,与文献值的相对偏差小于1%。本文还对温度在355~666K、压力在1~23 MPa范围内的高温高压水的比定压热容进行了测量。
Based on the flow-type calorimetry, a set of experimental system suitable for measuring specific heat capacity under high temperature and high pressure was established. By improving the pipeline layout and reasonable system structure design of traditional flow-type calorimeter, the temperature, The applicable range of pressure is: 293 ~ 673 K, 0.1 ~ 30 MPa. The experimental system temperature, pressure, constant pressure heat capacity than the measured uncertainty of 0.05 K, ± 13 kPa, ± 0.98%. In order to verify the measurement accuracy and reliability of the experimental system, specific constant pressure heat capacity of pure water in the temperature range of 296 ~ 313 K and pressure in the range of 0.1 ~ 6 MPa was measured. The relative deviation from the literatures was less than 1%. The specific heat capacity of high temperature and high pressure water with temperature between 355 ~ 666K and pressure between 1 ~ 23 MPa was also measured.