A Study of Thermophysical Properties of New Working Medium for Compression-Absorption Combined Cycle

本研究的结果涵盖了以下三个项目：1） Evaluation of the thermophysical properties of ammonia + water mixtures， 2） development of the experimental apparatus for measuring the thermodynamic properties of aqueous mixtures， 3） measurements of the thermodynamic properties of component substance of trifluoroethanol + water mixtures，As for the thermophysical properties of the amonia + water mixtures，文学已经被仔细调查过，而且文学也被汇编成了一个数据基础的实验数据。基于数据-基于构建的，与混合规则报告了与实验数据进行比较的可用状态等效。它包括了Ziegler和Trepp应该使用用于绘制enthalpy-centration diagram，而Soave应该使用用于绘制当前条件下的气相色谱的等同图。It（IT） ... More 它指出了PVTX属性、饱和的液体密度和良好的传输属性应该被测量为实验数据的不足，并且如果关键曲线应该被测量为在实验数据可用之间的干扰量的可测量为测量PVT属性、VLE属性、饱和的液体和蒸发密度、关键属性，优异的体积和各种衍生物，具有高准确性，已被构造，其性能已被确认在温度和压力范围内达到520 K和200 MPa。有可能在高温地区使用这种设备到700 K的温度范围内使用作为热转移介质的加热盐。2，2-三氟乙醇的压力在温度范围内测量到320 - 400 K的对应压力范围内的30 - 589千帕，每5 K的压力范围内测量到86个。根据这些实验数据，正常的沸腾点已经确定为（347.03+0.10） K. PVT性质和2， 2，2-三氟乙醇的饱和液体密度在313至413 K至200兆帕的温度范围内测量。trifluoroethanol + water mix\are undertaken的各种thermodynamic properties的度量。Less（低）

The results of this research cover the following three items : 1) Evaluation of the thermophysical properties of ammonia + water mixtures, 2) development of the experimental apparatus for measuring the thermodynamic properties of aqueous mixtures, 3) measurements of the thermodynamic properties of component substance of trifluoroethanol + water mixtures.As for the thermophysical properties of the ammonia + water mixtures, the literatures have been surveyed thoroughly, and the experimental data in the literatures have been compiled as a data-base. Based on the dataーbase constructed, the available equations of state with the mixing rules reported have been compared with the experimental data carefully. It is concluded that the equation of state proposed by Ziegler and Trepp should be used for drawing the enthalpy-concentration diagram, and that the equation of state proposed by Soave should be used for drawing the diagrams of the vapor-liquid equilibrium under the present conditions. It … More is pointed out that the PVTX properties, saturated liquid density, enthalpy as well as the transport properties should be measured because of a lack of the experimental data, and that the critical curve should be measured because of a considerable amount of discrepancy between the experimental data available.The experimental apparatus for measuring PVT properties, VLE properties, saturated liquid and vapor densities, critical properties, excess volume and various derivatives with high accuracy has been constructed, and its performance has been confirmed in the range of temperatures and pressures up to 520 K and 200 MPa. It is possible to use this apparatus in high temperature region to 700 K by using molten salt as heat-transfer medium.The vapor pressures of 2, 2, 2-trifluoroethanol have been measured in the temperature range from 320 to 400 K corresponding to the pressure range from 30 to 589 kPa, and 86 measurements at every 5 K have been obtained. Based on these experimental data, the normal boiling point has been determined to be (347.03+0.10) K. The PVT properties and saturated liquid densities of 2, 2, 2-trifluoroethanol have been measured in the range of temperatures from 313 to 413 K up to 200 MPa. The measurements of various thermodynamic properties of trifluoroethanol + water mixtures are undertaken. Less